Try this options:
a. total - 6 digits, '6' - 1 digit, then probability of rolling a '6' is 1/6;
b. total - 6 digits, '6' - 1 digit, then probability of rolling 1,2,3,4,5 is 5/6;
c. if probability of rolling a '6' is p and not rolling a '6' is q, then p+q=1;
d. if expected probability of one rolling a '6' is 1/6, then numbers of times of rolling a '6' during 120 times is 120/6=20 times.
Can you please help me find the volume? The answer must also be rounded to the nearest tenth
Answer:
67.0 cm^3
Step-by-step explanation:
The volume of the cylinder is given by the formula ...
V = πr^2·h
The volume of the hemisphere is given by the formula ...
V = (2/3)πr^3
The volume of the two figures together will be ...
V = πr^2·h + (2/3)πr^3 = πr^2(h +2/3r)
V = π(2 cm)^2·(4 cm + 2/3·2 cm) = 64π/3 cm^3
V ≈ 67.0 cm^3
Solve the equation of exponential decay. The population of a city is expected to be 440,000 in 2020. This is a decline of 12% from 2010 to 2020. Assuming this continued what would the population of the city be in 2040? Round to the nearest ten thousand
Answer:
about 340,000
Step-by-step explanation:
In 10 years, the population dropped to 0.88 of what it was in 2010. At the same rate, in 20 more years, it will drop to 0.88² of what it was in 2020:
2040 population = 440,000·0.88² ≈ 340,000
Answer:
about 340,000
Step-by-step explanation:
In 10 years, the population dropped to 0.88 of what it was in 2010. At the same rate, in 20 more years, it will drop to 0.88² of what it was in 2020:
2040 population = 440,000·0.88² ≈ 340,000
There are 11 paintings at an art show. Three of them are chosen randomly to display in the gallery window. The order in which they are chosen does not matter. How many ways are there to choose the paintings?
Answer:
165 ways to choose the paintings
Step-by-step explanation:
This is clearly a Combination problem since we are selecting a few items from a group of items and the order in which we chosen the items does not matter.
The number of possible ways to choose the paintings is;
11C3 = C(11,3) = 165
C denotes the combination function. The above can be read as 11 choose 3 . The above can simply be evaluated using any modern calculator.
Answer:
165 ways
Step-by-step explanation:
Total number of painting, n = 11
Now, three of them are chosen randomly to display in the gallery window.
Hence, r = 3
Since, order doesn't matter, hence we apply the combination.
Therefore, number of ways in which 3 paintings are chosen from 11 paintings is given by
[tex]^{11}C_3[/tex]
Formula for combination is [tex]^nC_r=\frac{n!}{r!(n-r)!}[/tex]
Using this formula, we have
[tex]^{11}C_3\\\\=\frac{11!}{3!8!}\\\\=\frac{8!\times9\times10\times11}{3!8!}\\\\=\frac{9\times10\times11}{6}\\\\=165[/tex]
Therefore, total number of ways = 165
Corey bought 2 1/2 liters of paint for $60. What was the cost per liter of paint
Hello there!
Answer:
$24
Step-by-step explanation:
In order to find the answer to your problem, we're going to need to find out how much ONE liter of paint costs.
Lets gather the information of what we know:
2 1/2 liters of paint
↑ Cost $60.
With the information we know, we can solve to find the answer.
In order to get the answer, we would need to divide 60 by 2 1/2 (or 2.5). We would need to do this because when we divide it, it would allow us to get the cost for 1 liter.
Lets solve:
[tex]60 \div 2.5=24[/tex]
When you divide, you should get the answer of 24.
This means that one liter of paint cost $24.
$24 should be your FINAL answer.
Answer:
$24/liter
Step-by-step explanation:
Write the the dollar amount first and the paint volume second in this ratio:
$60.00
--------------- = $24/liter
2.5 liters
Write the product of the monomials (8x6y)2 and (x3y4).
Answer:
The product of the monomials is 2304 [tex]x^{5}[/tex][tex]y^{6}[/tex]
Step-by-step explanation:
* Lets explain how to solve the problem
- We need to find the product of the monomials (8x 6y)² and
[tex]x^{3}y^{4}[/tex]
- At first lets solve the power of the first monomial
- Because the power 2 is on the bracket then each element inside the
bracket will take power 2
∵ (8x 6y)² = (8)²(x)²(6)²(y)²
∵ (8)² = 64
∵ (x)² = x²
∵ (6)² = 36
∵ (y)² = y²
∴ (8x 6y)² = [64x² × 36y²]
∵ 64 × 36 = 2304 x²y²
∴ The first monomial is 2304 x²y²
∵ The first monomial is 2304 x²y²
∵ The second monomial is [tex]x^{3}y^{4}[/tex]
- Lets find their product
- Remember in multiplication if two terms have same bases then we
will add their powers
∵ [2304 x²y²] × [ [tex]x^{3}y^{4}[/tex] ] =
2304 [ [tex]x^{2}*x^{3}[/tex] ] [ [tex]y^{2}*y^{4}[/tex] ]
∵ [tex]x^{2}*x^{3}[/tex] = [tex]x^{2+3}[/tex] = [tex]x^{5}[/tex]
∵ [tex]y^{2}*y^{4}[/tex] = [tex]y^{2+4}[/tex] = [tex]y^{6}[/tex]
∴ [2304 x²y²] × [ [tex]x^{3}y^{4}[/tex] ] = 2304 [tex]x^{5}[/tex][tex]y^{6}[/tex]
The product of the monomials is 2304 [tex]x^{5}[/tex][tex]y^{6}[/tex]
How do you simplify this expression step by step using trigonometric identities?
[tex]\bf \textit{Pythagorean Identities}\\\\ 1+tan^2(\theta)=sec^2(\theta) \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ sec^2(\theta )cos^2(\theta )+tan^2(\theta )\implies \cfrac{1}{\begin{matrix} cos^2(\theta ) \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix} }\cdot \begin{matrix} cos^2(\theta ) \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix} +tan^2(\theta ) \\\\\\ 1+tan^2(\theta )\implies sec^2(\theta )[/tex]
What is the value of x?
Answer:
Step-by-step explanation:
When an angle is bisected the opposite sides and the sides of the bisected angle are in a set ratio.
That translates into
(x + 8)/10 = (2x - 5)/14 Cross multiply
14* (x + 8) = 10* (2x - 5) Remove the brackets on both sides.
14x + 112 = 20x - 50 Subtract 14x from both sides.
112 = 20x - 14x - 50 Combine
112 = 6x - 50 Add 50 to both sides.
112+50 = 6x - 50 + 50 Combine
162 = 6x Switch
6x = 162 Divide by 6
x = 27
License plate numbers in a certain state consists of seven characters. The first character is a non-zero digit (1 through 9). The next four characters are capital letters (A through Z) and the last two characters are non-zero digits. Therefore, a license plate number in this state can be any string of the form:
Digit-Letter-Letter-Letter-Letter-Digit-Digit
(a) How many different liscence plate numbers are possible?
(b) How man licence plate numbers are possible if no digit appears more than once?
(c) How man licence plate numbers are possible if no digit or letter appears more than once?
Answer:
a) 333,135,504 different plates
b) 230,315,904 different plates
c) 180,835,200 different plates
Step-by-step explanation:
Pattern: Digit(1-9)-Letter-Letter-Letter-Letter-Digit(1-9)-Digit (1-9)
We will calculate the number of possibilities for the digits part, then for the letters part, then we'll multiply them together.
For the digits, we have 3 numbers, first and last 2 positions. We can consider this is a single 3-digit number, where n = 9 (since they are non-zero digits) and r = 3.
For the letters part, it's basically a 4-letter word, where n = 26 (A through Z) and r = 4.
(a) How many different license plate numbers are possible?
No limitation on repeats for this question:
For the digits, we have 9 * 9 * 9 = 729 (since repetition is allowed, and we can pick any digit from 0 to 9 for each position)
For the letters we have: 26 * 26 * 26 * 26 = 456,976
Because the digits and letters arrangements are independent from each other, we multiply the two numbers of possibilities to have the global number of possibilities:
P = 729 * 456976 = 333,135,504 different plates, when there's no repeat limitation.
(b) How man license plate numbers are possible if no digit appears more than once?
Repeats limitation on digits:
For the digits, we have 9 * 8 * 7 = 504 (since repetition is NOT allowed, we can pick any of 9 digits for first position, then any 8 remaining and finally any 7 remaining at the end)
For the letters we still have: 26 * 26 * 26 * 26 = 456,976
Because the digits and letters arrangements are independent from each other, we multiply the two numbers of possibilities to have the global number of possibilities:
P = 504 * 456976 = 230,315,904 different plates, when there's no repeat on the digits.
(c) How man license plate numbers are possible if no digit or letter appears more than once?
Repeats limitation on both digits and letters:
For the digits, we have 9 * 8 * 7 = 504 (
For the letters we still have: 26 * 25 * 24 * 23 = 358,800
Because the digits and letters arrangements are independent from each other, we multiply the two numbers of possibilities to have the global number of possibilities:
P = 504 * 358800 = 180,835,200 different plates, when there's no repeat on the digits AND on the letters.
If f (x) = – 4x3 + 2x2 – 1, find f (– 1)
Answer:
[tex]f(-1)=5[/tex]
Step-by-step explanation:
We know that the equation is
[tex]f(x)=-4x^3+2x^2-1[/tex]
We can then plug -1 in for x
[tex]f(-1)=-4(-1)^3+2(-1)^2-1\\\\f(-1)=-4(-1)+2(1)-1\\\\f(-1)=4+2-1\\\\f(-1)=5[/tex]
ANSWER
[tex]f( - 1) = 5[/tex]
EXPLANATION
The given function is
[tex]f(x) = - 4 {x}^{3} + 2 {x}^{2} - 1[/tex]
We substitute x=-1 to obtain:
[tex]f( - 1) = - 4 {( - 1)}^{3} + 2 {( - 1)}^{2} - 1[/tex]
We simplify to obtain;
[tex]f( - 1) = 4 + 2 - 1[/tex]
.
This evaluates to
[tex]f( - 1) = 5[/tex]
8) Factor each sum or difference of cubes completely.
a. 8x3 + 27
Answer:
[tex]\large\boxed{(2x+3)(4x^2-6x+9)}[/tex]
Step-by-step explanation:
[tex]8=2^3\\\\8x^3=2^3x^3=(2x)^3\\\\27=3^3\\\\8x^3+27=(2x)^3+3^3\qquad\text{use}\ a^3+b^3=(a+b)(a^2-ab+b^2)\\\\=(2x+3)\bigg((2x)^2-(2x)(3)+3^2\bigg)=(2x+3)(4x^2-6x+9)[/tex]
Write these expressions in exponential form:
1. 10 * 10 * 10 * 10 *10
2. y * y * x * x * x * z * z * z * z *z
3. What is 14 to the zero power?
1. 10^5
2. z^5*x^3*y^2
3. 1
Which could be the area of one face of the rectangular prism?Check all that apply
Answer:
24 cm², 44 cm², and 66 cm²
Step-by-step explanation:
The rectangular prism has six faces. The opposite faces have the same area, so we can say there are three faces with unique areas.
The face on the bottom of the rectangular prism has an area of:
A = 11 cm * 4 cm = 44 cm²
The face on the side of the rectangular prism has an area of:
A = 4 cm * 6 cm = 24 cm²
And the face on the front of the rectangular prism has an area of:
A = 11 cm * 6 cm = 66 cm²
So 24 cm², 44 cm², and 66 cm² are all answers that apply.
Joan Arlington has twice as much money invested at 5% simple annual interest as
she does at 4%. If her yearly income from the two investments is $399, how much
does she have at each rate?
at each rate?
Please Help me
[tex]5 \div 100 \times 399 \times 1 = 19.95 \: and \: 4 \div 100 \times 399 \times 1 = 15.96[/tex]
Alice has a total of 12 dimes and nickels. She has 2 more nickels than dimes. Which equation represents the given problem situation?
A. c + (c + 2) = 12, where c is the number of dimes
B. c + 2c = 12, where c is the number of nickels
C. c + (c + 2) = 12, where c is the number of nickels
D. c + 2c = 12, where c is the number of dimes
Answer: The correct option is
(A) [tex]c+(c+2)=12,[/tex] where c is the number of dimes.
Step-by-step explanation: Given that Alice has a total of 12 dimes and nickels and she has 2 more nickels than dimes.
We are to select the correct equation that represents the given problem situation.
Let c represents the number of dimes. Then, the number of nickels will be (c + 2).
Since there are total 12 coins, so the required equation is given by
[tex]c+(c+2)=12.[/tex]
Thus, the required equation is
[tex]c+(c+2)=12,[/tex] where c is the number of dimes.
Option (A) is CORRECT.
The expression for the total number of dimes and nickels is c+(c+2)=12. Option A is the correct answer.
How do you express the number of dimes and nickels?Given that Alice has a total of 12 dimes and nickels.
Also given that she has 2 more nickels than dimes.
Let us consider that c is the number of dimes. Then the number of nickels is given as,
Number of nickels = c+2
The total sum of dimes and nickels is 12, then,
Number of dimes + Number of nickels = 12
c + (c+2) = 12
Hence the expression for the total number of dimes and nickels is c+(c+2)=12. Option A is the correct answer.
To know more about the sum, follow the link given below.
https://brainly.com/question/24412452.
Given the system of equations:
2x – y = –2
x = 14 + 2y
Answer the following:
A) What is the value of the system determinant?
B) What is the value of the y−determinant?
C) What is the value of the x−determinant?
D) What is the solution to the system of equations?
My mind is blank when I look at this, any help will be appreciated.
Answer:
The determinant of A (the main matrix) is -3; the determinant of y is 30; the determinant of x is 18; the solution to the system is (-6, -10)
Step-by-step explanation:
Set up the matrix to find the determinant of the main matrix. Find the determinant by multiplying the numbers on the major axis and subtract from that the multiplication of the numbers on the minor axis:
[tex]\left[\begin{array}{ccc}2&-1&\\1&-2\\\end{array}\right][/tex]
Find the determinant by multiplication:
(2×-2)-(1×-1)= -3
To find the determinant of y, replace the second column with the solutions to have a matrix that looks like this:
[tex]\left[\begin{array}{ccc}2&-2\\1&14\\\end{array}\right][/tex]
To find the determinant of that matrix by multiplication:
(2×14)- (1× -2) = 30
Lastly, find the determinant of x by replacing the first column with the solutions. That matrix will look like this:
[tex]\left[\begin{array}{ccc}-2&-1\\14&-2\\\end{array}\right][/tex]
Find the determinant of x by multiplication:
(-2 × -2) - (14 × -1) = 18
Now we want Cramer's Rule that tells us if we divide the determinant of [tex]A_{x}[/tex]
by the determinant of A, we will find the value of x:
[tex]\frac{A_{x} }{A}=\frac{18}{-3} =-6[/tex]
and the same for y:
[tex]\frac{A_{y} }{A}=\frac{30}{-3}=-10[/tex]
So the solution to the system is (-6, -10)
2x - y = -2
x = 14 + 2y
2x - y = -2
x - 2y = 14
The system determinant = -3
2 (-2) - 1 (-1)
-4 + 1
-3
The y-determinant = 30
(14) - 1 (-2)
28 + 2
30
The x-determinant = 18
-2 (-2) - 14 (-1)
4 + 14
18
The solution is x = -6 and y = -10 or (-6,-10)
x = 18/-3
x = -6
y = 30/-3
y = -10
Subtract.
(4x^2 + 8x - 2) - (2x^2 - 4x + 3)
Enter your answer, in standard form.
Answer:
[tex]\large\boxed{(4x^2 + 8x - 2) - (2x^2 - 4x + 3)=2x^2+12x-5}[/tex]
Step-by-step explanation:
[tex](4x^2 + 8x - 2) - (2x^2 - 4x + 3)\\\\=4x^2 + 8x - 2 -2x^2 -(- 4x)- 3\\\\=4x^2+8x-2-2x^2+4x-3\qquad\text{combine like terms}\\\\=(4x^2-2x^2)+(8x+4x)+(-2-3)\\\\=2x^2+12x-5[/tex]
please help and thank you.
Answer:
Step-by-step explanation:
This is a negative x^2 quadratic. I'm not sure if there's anything else you need.
The angles of elevation of a hot air balloon from the two points on level ground are 20° and 42° respectively. If the points are 4.8 miles apart and the balloon is between the points, approximate, to the nearest tenth of a mile, the height of the balloon above the ground.
Answer:
To the nearest tenth, the height of the balloon is 2.9 miles
Step-by-step explanation:
The nearer point takes the greater angle of elevation.
The diagram is shown in the attachment.
The height of the balloon above the ground is c unit.
From triangle ABD,
[tex]\tan 42\degree=\frac{c}{x}[/tex]
[tex]\implies x=\frac{c}{\tan 42\degree}[/tex]...eqn1
From triangle ABC,
[tex]\tan 20\degree=\frac{c}{x+4.8}[/tex]
[tex]\implies x+4.8=\frac{c}{\tan 20\degree}[/tex]
[tex]\implies x=\frac{c}{\tan 20\degree}-4.8[/tex]..eqn2
We equate both equations and solve for c.
[tex]\frac{c}{\tan 42\degree}=\frac{c}{\tan 20\degree}-4.8[/tex]
[tex]\frac{c}{\tan 42\degree}-\frac{c}{\tan 20\degree}=-4.8[/tex]
[tex]\implies (\frac{1}{\tan 42\degree}-\frac{1}{\tan 20\degree})c=-4.8[/tex]
[tex]\implies -1.636864905c=-4.8[/tex]
[tex]\implies c=\frac{-4.8}{-1.636864905}[/tex]
[tex]c=2.932435039[/tex]
To the nearest tenth, the height of the balloon is 2.9 miles
Answer:
on usatestprep its 1.2
Step-by-step explanation:
what is the solution in this equation -8x+4=36
Answer:
X=-4
Step-by-step explanation:
Answer:
x = -4
Step-by-step explanation:
-8x+4=36
-4
-8x =32
/-8 /-8
x = -4
What is the value of x? Enter your answer in the box
Answer:
x = 20
Step-by-step explanation:
Formula
x1/x2 = x3/x4
Givens
x = 11
x2 = 11 + 121 = 132
x3 = 10
x4 = 10 + 5x + 10
Solution
11/132 = 10 / (5x + 10 + 10) Combine
11/132 = 10/(5x + 20) Cross multiply
11*(5x + 20) = 132 * 10 Combine on the right.
11(5x + 20 ) = 1320 Divide by 11. (You could remove the brackets, but this is easier.
11(5x + 20)/11 = 1320/11 Do the division
5x + 20 = 120 Subtract 20 from both sides
5x + 20-20 = 120 - 20 Combine
5x = 100 Divide by 5
5x/5 = 100/5
x = 20
A ball is thrown vertically upward. After t seconds, its height h (in feet) is given by the function h(t)=72t-16t^2. What is the maximum height that the ball will reach?
Do not round your answer
Answer:
The maximum height that the ball will reach is 81 ft
Step-by-step explanation:
Note that the tray of the ball is given by the equation of a parabola of negative main coefficient. Then, the maximum value for a parabola is at its vertex.
For an equation of the form
[tex]at ^ 2 + bt + c[/tex]
So
the t coordinate of the vertice is:
[tex]t =-\frac{b}{2a}[/tex]
In this case the equation is:
[tex]h(t)=72t-16t^2[/tex]
So
[tex]a=-16\\b=72\\c=0[/tex]
Therefore
[tex]t =-\frac{72}{2(-16)}[/tex]
[tex]t=2.25\ s[/tex]
Finally the maximum height that the ball will reach is
[tex]h(2.25)=72(2.25)-16(2.25)^2[/tex]
[tex]h=81\ ft[/tex]
The ball thrown vertically upwards will reach the maximum height of 81 feet after 2.25 seconds.
Explanation:To find the maximum height the ball will reach, first, we need to recognize that the equation 'h(t)=72t-16t^2' is a quadratic function in the form of 'f(t)=at^2+bt+c'. The maximum point of a quadratic function, also known as the vertex, happens at 't=-b/2a'. In this case, 'a' is -16 and 'b' is 72.
So the maximum height is achieved at 't=-72/(2*-16)' or 't=72/32 = 2.25' seconds.
To find out the maximum height, we just need to substitute this value of t into the equation for h(t):
h(2.25)=72*2.25-16*2.25^2
The above calculation gives a maximum height of 81 feet.
Learn more about Maximum height here:https://brainly.com/question/29081143
#SPJ3
HELP! (37PTS)
the graph of the of the quadratic function f is shown on the grid.Which of these best represents the domain of f ?
a. -3 ≤ х ≤ 2
b. all real numbers
c. y ≥ 5.5
d. All real numbers less than -3 or grater than 2
Domain:set of all possible x values,independent variable.
Range:Set of all possible y values, dependent variable.
Marissa reviews the graph and remembers
to look at how far the graph goes from the right to the left.She choses A for the correct domain
Error:
Solution:
Answer:
b. all real numbers
Step-by-step explanation:
The graphs of positive and negative x^2 parabolas will always have a domain of all real numbers. Even though you only have a portion of the graph and see a "restriction" on your domain values, it is incorrect to assume that the domain is limited to what you can see. As the branches of the parabola keep going up and up and up, the values of x keep getting bigger and bigger and bigger. Again, this is true for all + or - parabolas.
Answer:
The error is C and the solution is B
Step-by-step explanation:
C is because she didn't look left to right to see that is goes on forever
B because you look left and right to see
help please
greatest common factor find the GCF of each
must show work
11) Factors of 55 are 1,5,11,55 Factors of 75 are 1,3,5,15,25,75
The greatest common factor is 5.
12) With algebraic expressions you just simplify and multiplier in the simplification is the greatest common factor.
66yx + 30x^2y --) 6yx( 11 + 5x ) so the greatest common factor is 6yx.
13) 60y + 56x^2 --) 4( 15y + 14x^2 ) so the greatest common factor is 4.
14) 36xy^3 + 24y^2 --) 12y^2( 3xy + 2 ) so the greatest common factor is 12y^2.
15) 18y^2 + 54y^2 --) 18y^2( 1 + 3 ) so the greatest common factor is 18y^2.
16) 80x^3 + 30yx^2 --) 10x^2( 8x + 3y ) so the greatest common factor is 10x^2.
17) 105x + 30yx + 75x --) 15x( 7 + 2y + 5 ) so the greatest common factor is 15x.
18) 140n + 140m^2 + 80m --) 20( 7n + 7m^2 + 4m ) so the greatest common factor is 20.
If you want a further explanation step by step just ask :)
how much string is left when 1 and 3/4 in are cut from a piece measuring 3 and 1 /6 inches
Answer:
1 5/12 inches.
Step-by-step explanation:
That is 3 1/6 - 1 3/4
= 19/6 - 7/4
The lowest common denominator of 4 and 6 is 12, so we have:
38/12 - 21/12
= 17 /12
= 1 5/12 inches (answer).
The remaining string length after cutting [tex]\(1 \frac{3}{4}\)[/tex] inches is [tex](1 \frac{5}{16}\)[/tex]inches.
The correct option is (a).
find out how much string is left when [tex]\(1 \frac{3}{4}\)[/tex] inches are cut from a piece initially measuring[tex]\(3 \frac{1}{16}\)[/tex]inches.
1. Convert the mixed numbers to improper fractions:
[tex]- \(1 \frac{3}{4}\) inches = \(\frac{7}{4}\) inches[/tex]
[tex]- \(3 \frac{1}{16}\) inches = \(\frac{49}{16}\) inches[/tex]
2. Make the denominators equal:
- Multiply the numerator and denominator of [tex]\(\frac{7}{4}\)[/tex]by 16 to make the denominators equal:
[tex]\(\frac{7}{4} = \frac{112}{64}\)[/tex]
- Now we have:
- Initial length = [tex]\(\frac{49}{16}\)[/tex] inches
- Cut length = [tex]\(\frac{112}{64}\)[/tex] inches
3. Subtract the two fractions:
- Subtract the cut length from the initial length:
[tex]\(\frac{49}{16} - \frac{112}{64}\)[/tex]
- To subtract, we need a common denominator. The least common multiple (LCM) of 16 and 64 is 64.
- Convert both fractions to have a denominator of 64:
[tex]\(\frac{49}{16} = \frac{196}{64}\)[/tex]
[tex]\(\frac{112}{64}\) remains the same.[/tex]
- Subtract the numerators:
[tex]\(\frac{196}{64} - \frac{112}{64} = \frac{84}{64}\)[/tex]
4. Simplify the result:
- Divide both the numerator and denominator by their greatest common factor (GCF), which is 4:
[tex]\(\frac{84}{64} = \frac{21}{16}\)[/tex]
5. Convert back to a mixed number:
- Divide the numerator by the denominator:
[tex]\(\frac{21}{16} = 1 \frac{5}{16}\)[/tex]
Therefore, the remaining string length after cutting [tex]\(1 \frac{3}{4}\)[/tex] inches is [tex](1 \frac{5}{16}\)[/tex]inches.
The recursive rule for a geometric sequence is given. a1=2; an=1/3a subscript (n−1) Enter the explicit rule for the sequence. an=
ANSWER
[tex]a_n=2{( \frac{1}{3}) }^{n-1}[/tex]
EXPLANATION
The recursive formula is given as:
[tex]a_n= \frac{1}{3} a_{n-1}[/tex]
where
[tex]a_1=2[/tex]
The explicit rule is given by:
[tex]a_n=a_1 {r}^{n-1}[/tex]
From the recursive rule , we have
[tex]r = \frac{1}{3} [/tex]
We substitute the known values into the formula to get;
[tex]a_n=2{( \frac{1}{3}) }^{n-1}[/tex]
Therefore, the explicit rule is:
[tex]a_n=2{( \frac{1}{3}) }^{n-1}[/tex]
what is the sum of the fractions
Answer:
[tex]6\frac{7}{9}[/tex]
Step-by-step explanation:
[tex]6\frac{2}{3}+\frac{1}{9} = 6\frac{6}{9}+\frac{1}{9}=6 \frac{7}{9}[/tex]
Answer:
Step-by-step explanation:
its D
Jana is decorating 6 picture frames by gluing straws around the borders and adding wooden stars at the corners. Each picture frame measures 20 centimeters by 120 millimeters. How many straws does she need if she uses all of each straw? Each straw is 80 millimeters long. A. 21 straws B. 24 straws C. 48 straws D. 50 straws
Answer:
C: 48 straws
Step-by-step explanation:
First, find the perimeter of one picture frame: (2 x length) + (2 x width). Convert 20 centimeters to millimeters so that you are working in the same units; there are 10 millimeters in 1 centimeter, so 20 centimeters = 200 millimeters.
(2 x 200) + (2 x 120) = 400 + 240 = 640
Each picture frame has a perimeter of 640 millimeters.
Next, figure out how many straws are needed for one picture frame:
640/80 = 8
Jana uses 8 straws for each picture frame. Since she is decorating 6 picture frames, solve 6 x 8 = 48.
Jana needs 48 straws to complete her project.
A mother who is 40 years old has a daughter and a son. The son is twice as old as the daugther. In 15 years the sum of all their ages will be 100 years. How old are the siblings now?
Answer:
The son's age is 10 and the daughter's age is 5 now
Step-by-step explanation:
Let
x-----> the son's age now
y----> the daughter's age now
we know that
x=2y ----> equation A
(x+15)+(y+15)+(40+15)=100
x+y+85=100
x+y=15 -----> equation B
Substitute equation A in equation B and solve for y
2y+y=15
3y=15
y=5 years
Find the value of x
x=2(5)=10 years
therefore
The son's age is 10.
The daughter's age is 5
Danny is a drummer who purchases his drumsticks online. When practicing with the newest pair, he notices they feel heavier than usual. When he weighs one of the sticks, he finds that it is 2.44 oz. The manufacturer's website states that the average weight of each stick is 2.00 oz with a standard deviation of 0.19 oz. Assume that the weight of the drumsticks is normally distributed. What is the probability of the sticks weight being 2.44 oz or greater?
Answer:
Probability of the sticks weight being 2.44 oz or greater is 0.01017 .
Step-by-step explanation:
We are given that the manufacturer's website states that the average weight of each stick is 2.00 oz with a standard deviation of 0.19 oz.
Also, it is given that the weight of the drumsticks is normally distributed.
Let X = weight of the drumsticks, so X ~ N([tex]\mu = 2,\sigma^{2} = 0.19^{2}[/tex])
The standard normal z distribution is given by;
Z = [tex]\frac{X-\mu}{\sigma}[/tex] ~ N(0,1)
Now, probability of the sticks weight being 2.44 oz or greater = P(X >= 2.44)
P(X >= 2.44) = P( [tex]\frac{X-\mu}{\sigma}[/tex] >= [tex]\frac{2.44-2}{0.19}[/tex] ) = P(Z >= 2.32) = 1 - P(Z < 2.32)
= 1 - 0.98983 = 0.01017
Therefore, the probability of the sticks weight being 2.44 oz or greater is 0.01017 .
Final answer:
The probability of the sticks weighing 2.44 oz or more is approximately 0.01017.
Explanation:
Given that the manufacturer's website states that the average weight of each stick is 2.00 oz with a standard deviation of 0.19 oz, we know the weight of the drumsticks is normally distributed.
Let X represent the weight of the drumsticks, with X being normally distributed with a mean (μ) of 2 and a variance [tex](\sigma^2) \ of \ 0.19^2[/tex]
To find the probability of the sticks weighing 2.44 oz or more, we need to calculate P(X ≥ 2.44).
We can standardize X using the formula Z = (X - μ) / σ, which results in a standard normal distribution with mean 0 and standard deviation 1.
So, to find P(X ≥ 2.44), we compute P((X - μ) / σ ≥ (2.44 - 2) / 0.19), which simplifies to P(Z ≥ 2.32).
From the standard normal distribution table or a calculator, we find that P(Z < 2.32) is approximately 0.98983.
Therefore, P(Z ≥ 2.32) = 1 - P(Z < 2.32) = 1 - 0.98983 = 0.01017.
Hence, the probability of the sticks weighing 2.44 oz or more is approximately 0.01017.
What are the solutions to the system of equations?
x = x^2 - 4x +3
y = -x +3
( , ) and ( , )
Answer:
(0,3) and (3,0)
Step-by-step explanation:
The first thing to do is graph the two equations to see where they intersect. Then you know what answer to look for. The graph is below. It was done on desmos.
I take it the first equation is a typo and should be y = x^2 - 4x + 3
Equate the two equations.
-x + 3 = x^2 -4x + 3 Subtract 3 from both sides
-x = x^2 - 4x + 3-3
-x = x^2 - 4x Add x to both sides.
0 = x^2 - 4x + x
0 = x^2 - 3x Factor
0 = x(x - 3)
So x can equal 0
or x can equal 3
In either case the right side will reduce to 0.
Case 1. x = 0
y= - x + 3
y = 0 + 3
y = 3
So the point is (0,3)
Case 2. x = 3
y = - x + 3
y = - 3 + 3
y = 0
So the point is (3,0)