Answer: 2.0 seconds & 2.75 seconds
Step-by-step explanation:
[tex]d=\dfrac{s\times r}{3.6}\quad where;\\\\\bullet d=\text{reaction distance (in meters)}\\\bullet s=\text{speed (in km/hr)}\\\bullet r=\text{reaction time (in seconds)}\\\bullet 3.6=\text{needed to convert km/hr into meters/second}\\\\\\\large{\text{When d=20m and s=36}}\\\\20=\dfrac{36}{3.6}\times r\\\\20=10r\\\\\large{\boxed{2=r}}\\\\\\\text{When d=41.25m and s=54}\\\\41.25=\dfrac{54}{3.6}\times r\\\\41.25=15r\\\\\large\boxed{2.75=r}[/tex]
Find b. given that a = 20, angle A= 30°, and angle B = 45° in triangle ABC.
a = 20
300
45
10_2
20/2
20/3
4022
Answer:
The value of b is 28.28
Step-by-step explanation:
We would use Law of sines to find the value of b
The law of sines is:
[tex]\frac{a}{sinA}=\frac{b}{sinB}[/tex]
We are given
a= 20
A = 30°
B = 45°
b=?
Putting values in the formula:
[tex]\frac{20}{sin(30)}=\frac{b}{sin(45)}\\\frac{20}{0.5}=\frac{b}{0.707}\\b = \frac{20}{0.5} * 0.707\\b = 40 * 0.707\\b= 28.28\\[/tex]
The value of b is 28.28
100% minus 9/10 enter the answer as an exact decimal or simplified fraction
Answer:
0.1 or 1/10
Step-by-step explanation:
100% --> 1
9/10 --> 0.9
1 - 0.9 = 0.1
If f(9)=7, then the point ___________ is on the graph of f.
Answer:
(9,7)
Step-by-step explanation:
F(a)=b means the point (a,b) is on the graph of F
The point that is on the graph of the function f, given f(9)=7, is (9, 7). This results because 9 is the input (x-coordinate) and 7 is the output (y-coordinate) of the function.
Explanation:In mathematics, particularly in graphing functions, each point on the graph of a function f is represented by an ordered pair: the input (x-coordinate) and the output (y-coordinate). When you are given that f(9)=7, this essentially means that when the input is 9, the output is 7. Therefore, the point that is on the graph of the function f is (9, 7).
Learn more about Graphing Functionshttps://brainly.com/question/8613034
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How long will it take to earn $1800 in interest if $6000 is invested at a 6% annual interest rate?
Answer:
It will take 5 years.
Step-by-step explanation:
Let's find how long it will take, but first let's understand the equation.
For simple interest, we use the equation:
T=(1/R)*(((A+B)/B)-1) where,
A= interest amount
B=invested money
R=interest rate (in decimal form)
T=time
Because we want to earn $1800 in interest, then A=1800.
Because we invested $6000, then B=6000.
Because we are investing under an interest rate of 6%, then R=0.06.
'How long will it take' means that T= not given, but its value is in 'years', since an annual rate was given.
Using the equation for simple interest we write:
T=(1/0.06)*(((1800+6000)/6000)-1), the solution is then:
T=5; remember, because is an annual rate, T solution means 5 years.
what is the exact volume of the cylinder 1.5 m 2.5 m
Identify the vertex and the y-intercept of the graph of the function,
y = 0.25(x + 5)2
[tex]\bf ~~~~~~\textit{parabola vertex form} \\\\ \begin{array}{llll} \stackrel{\textit{we'll use this one}}{y=a(x- h)^2+ k}\\\\ x=a(y- k)^2+ h \end{array} \qquad\qquad vertex~~(\stackrel{}{ h},\stackrel{}{ k}) \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ y=0.25(x+5)^2\implies y=0.25[x-(\stackrel{h}{-5})]^2+\stackrel{k}{0}~\hfill \stackrel{\textit{vertex}}{(-5,0)} \\\\[-0.35em] ~\dotfill[/tex]
[tex]\bf \stackrel{\textit{the y-intercept occurs when x =0}~\hfill }{y=0.25(0+5)^2\implies y=0.25(5)^2}\implies y=6.25~\hfill \stackrel{\textit{y-intercept}}{(0, 6.25)}[/tex]
To identify the vertex and the y-intercept for the function \( y = 0.25(x + 5)^2 \), we will use our knowledge of quadratic functions and their properties.
Vertex:
The given function is in the form of \( y = a(x - h)^2 + k \), where (h, k) is the vertex of the parabola. This form is commonly referred to as the vertex form.
For the given function, \( y = 0.25(x + 5)^2 \), we can see that it is equivalent to \( y = 0.25(x - (-5))^2 + 0 \), indicating that the vertex (h, k) is at (-5, 0). This means the parabola opens upwards (because the coefficient of \( (x + 5)^2 \) is positive) and has its vertex point at x = -5 and y = 0.
Y-intercept:
The y-intercept of a function is found by evaluating the function when x = 0.
So we'll substitute x = 0 into the function to find the y-coordinate of the y-intercept:
\( y = 0.25(0 + 5)^2 \)
Now, we'll calculate the value inside the parentheses:
\( 0 + 5 = 5 \)
Then, we raise it to the power of 2:
\( 5^2 = 25 \)
Finally, we multiply by 0.25:
\( y = 0.25 \times 25 = 6.25 \)
Therefore, the y-intercept where the graph crosses the y-axis is at the point (0, 6.25), where the x-coordinate is 0 and the y-coordinate is the value we just calculated, 6.25.
In summary, the vertex of the function \( y = 0.25(x + 5)^2 \) is (-5, 0), and the y-intercept is at (0, 6.25).
why are units of measure important when solving real-word problems?
In physics, we always measure quantities and compare them with a standard. That standard defines a unit of the quantity. Suppose you want to measure the length of a car, so you use a meter stick, which is the standard for measuring distances. Then, why are units of measure important when solving real-world problems? Well, because when solving problems that involve equations, they need to be dimensionally consistent, but what does it mean? it means that you can't add two terms having different units. For instance, you can't add apples with tables!
At the beginning of year 1, Josie invests $400 at an annual compound interest
rate of 5%. She makes no deposits to or withdrawals from the account.
Which explicit formula can be used to find the account's balance at the
beginning of year 3?
The balance in Josie's account at the beginning of year 3, with a $400 investment at 5% annual compound interest, can be calculated using the compound interest formula A = P(1 + r)^n, which results in $441.
Explanation:The explicit formula to find the account's balance at the beginning of year 3 for Josie's investment with an annual compound interest rate can be determined using the compound interest formula:
A = P(1 + r)^n
Where:
A is the amount of money accumulated after n years, including interest.P is the principal amount (the initial amount of money).r is the annual interest rate (decimal).n is the number of years the money is invested.In Josie's case, she invested $400 at a 5% annual interest rate for 2 years. The formula will look like this:
A = 400(1 + 0.05)^2
Now, calculate the amount:
A = 400(1 + 0.05)^2
A = 400(1.05)^2
A = 400(1.1025)
A = $441
Hence, the balance in Josie's account at the beginning of year 3 would be $441.
Which of the following is equivalent to the radical expression below when
X>0?
For this case we must simplify the following expression:
[tex]\frac {\sqrt {10x ^ 3}} {\sqrt {5x}}[/tex]
We combine the expression in a single radical:
[tex]\sqrt {\frac {10x ^ 3} {5x}} =[/tex]
We eliminate common factors of the numerator and denominator:
[tex]\sqrt {\frac {2x ^ 3} {x}} =\\\sqrt {2x ^ 2} =[/tex]
By definition of power properties we have to:
[tex]\sqrt [n] {a ^ m} = a ^ {\frac {m} {n}}[/tex]
So:
[tex]\sqrt {2x ^ 2} = x \sqrt {2}[/tex]
Answer:
Option A
Select the correct answer.
What is the value of y in this triangle?
Answer:
36°
Step-by-step explanation:
134° is the exterior angle of the triangle.
By the exterior angle theorm
134° = 98° + y
y = 134° - 98° = 36°
Multiply (3x^2-4x+5)(x^2-3x+2)
Answer: 3x4 - 13x3 + 28x2 - 23x + 10
Step-by-step explanation:
(3x2 - 4x + 5)(x2 - 3x + 2)
(3x4 - 9x3 + 6x2)
+ (-4x3 + 12x2 - 8x)
(10x2 - 15x + 10)
3x4 - 13x3 + 28x2 - 23x + 10
Answer: 3x^4 - 13x^3 + 23x^2 -23x + 10
For me at least
Step-by-step explanation: Good luck! :)
I WILL AWARD BRAINLIEST!!! PLEASE HELP!!!
Given: ∠AOC, ∠BOC - linear pair
OM - ∠ bisector of ∠ AOC
ON - ∠ bisector of ∠ BOC
Find: m∠MON
Fill in the blanks for the Statement and Reason below :
Statement Reason
1.m∠AOC +m∠______ = 180° | ______________________
2. m∠AOC = 2·m∠_______ |______________________
3. m∠BOC = 2·m∠_______ |______________________
4. m∠MOC +m∠_____ = |
1/2(m∠AOC +m∠_____) = ___ | Algebra, transitivity
5. m∠MON = ____ | Algebra
Check the picture below.
recall that OM is an angle bisector, so those two "green" angles are equal, the same goes for ON which is also an angle bisector, those two "red" angles are also equal.
Answer:
hello
Step-by-step explanation:
i'm just making this answer so the other guy who obviously worked VERY hard on his answer can get a brainliest. :) don't mind me
given u=(5,-2,3) and v=(1,1,2) find ordered triple that represents 3u-2v
Answer:
(13, -8, 5)
Step-by-step explanation:
Given
[tex]u = (5,-2,3)\\and\\v = (1,1,2)[/tex]
We have to find 3u-2v
So,
[tex]3u = 3(5,-2,3)\\3u= (15,-6,9)\\\\And\\\\2v= 2(1,1,2)\\2v= (2,2,4)\\\\3u-2v = (15,-6,9) - (2,2,4)\\= (15-2, -6-2 , 9-4)\\= (13, -8, 5)[/tex]
The ordered triple that represents 3u-2v is:
(13, -8, 5) ..
Answer:
C on edge
Step-by-step explanation:
Did the practice :)
Please answer ASAP and if you do you will get Brainliest. Catherine buys a gallon of ice cream from the store. After taking it home, she eats a fifth of a gallon of ice cream. Her sister eats some of the ice cream as well. If two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?
Answer:
Catherine's sister ate 2/15 gallons of the ice cream.
[tex]\displaystyle \frac{2}{15}[/tex].
Step-by-step explanation:
Let [tex]x[/tex] be the amount of ice cream that Catherine's sister ate, in gallons.
Original amount: 1 gallon.What Catherine ate: [tex]\displaystyle \frac{1}{5}[/tex] gallons.What Catherine's sister ate is assumed to be [tex]x[/tex] gallons.What's left: [tex]\displaystyle \frac{2}{3}[/tex] gallons.Consider the relationship:
[tex]\text{Original amount - What Catherine ate - What Catherine's Sister ate}\\ =\text{ What's left.}[/tex].
That is:
[tex]\displaystyle 1- \frac{1}{5} - x = \frac{2}{3}[/tex].
Add [tex]x[/tex] to both sides of this equation:
[tex]\displaystyle 1 - \frac{1}{5} = \frac{2}{3} +x[/tex]
Substract [tex]\displaystyle \frac{2}{3}[/tex] from both sides:
[tex]\displaystyle 1 - \frac{1}{5} - \frac{2}{3} = x[/tex].
Convert the denominator of all three numbers on the left-hand side to [tex]3 \times 5 = 15[/tex]
[tex]\displaystyle \frac{15}{15} - \frac{3}{15} - \frac{10}{15} = x[/tex].
[tex]\displaystyle x = \frac{2}{15}[/tex].
In other words, Catherine's sister ate [tex]\displaystyle \frac{2}{15}[/tex] gallons of the ice cream.
To solve this, we need to add the 1/5 of the ice cream to the 2/3 left of ice cream to find out how much her sister ate.
First, we need a common denominator. We can multiply 3 by 5 to get a common denominator easiest, since they are both multiples of it.
3*5=15
Now multiply the numerators by the amount the denominators were multiplied by.
1*3=3 so 3/15
2*5=10 so 10/15
Now, add them together.
10/15+3/15= 13/15.
Finally, subtract that amount from the original full amount of ice cream (15/15) to get the amount her sister ate, since that is the only unknown value left.
15/15-13/15=2/15.
Because 15 isn’t divisible by 2, we can’t simplify this fraction anymore.
Her sister ate 2/15 of a gallon of ice cream.
Hope this helps!
A coin is tossed 4 times. Which of the following represents the probability of the coin landing on heads all 4 times?
A.1/64
B.1/4
C.1/16
D.1/128
Answer:
C.1/16
Step-by-step explanation:
When a coin is tossed 4 times, the number of outcomes are:
2^4 = 16
So,
From the outcomes, only one outcome will be when there will be all heads
So, the probability will be:
One out of the 16 outcomes
Hence, the probability of a coin landing on heads all 4 times is:
C.1/16
Which graph represents this system?
y=1/2x+3
y=3/2x-1
Suppose an airplane climbs 15 feet for every 40 feet it moves forward. What is the slope of this airplanes ascent?
A) -3/4
B) -8/3
C) 1/3
D) 3/8
Answer:
3/8
Step-by-step explanation:
Slope is the same as rise over run, or y/x. In this case, rise over run is 15 over 40, or 15/40. Simplified, this is 3/8.
i will give brainliest A whole number is 6 more than 2 times another number. The sum of the two numbers is less than 50. This can be written in an inequality as x + 2x + 6 < 50, where x represents the smaller number.
From the set {13, 14, 15, 16, 17}, the values of x for which the inequality holds true are .
Answer:
13 and 14
Step-by-step explanation:
13+ (2*13) +6= 45 which is less than 50
14+ (2*14) +6= 48 which is also less than 50.
When you do the same with 15,16, and 17 the answers all come out to be 51, 54, and 57 which are all greater than 50
Answer:
13 and 14
Step-by-step explanation:
Given : [tex]x + 2x + 6 < 50[/tex]
To Find : From the set {13, 14, 15, 16, 17}, the values of x for which the inequality holds true are .
Solution:
Inequality : [tex]x + 2x + 6 < 50[/tex]
Substitute x = 13
[tex]13 + 2(13) + 6 < 50[/tex]
[tex]45 < 50[/tex]
Substitute x = 14
[tex]14 + 2(14) + 6 < 50[/tex]
[tex]48 < 50[/tex]
Substitute x = 15
[tex]15 + 2(15) + 6 < 50[/tex]
[tex]51 > 50[/tex]
Substitute x = 16
[tex]16+ 2(16) + 6 < 50[/tex]
[tex]54 > 50[/tex]
Substitute x = 17
[tex]17+ 2(17) + 6 < 50[/tex]
[tex]57 > 50[/tex]
So, the values of x for which the inequality holds true are 13 and 14.
Generalize the pattern by finding the nth term.
6, 10, 14, 18, ....
Question 1 options:
2n + 4
4n + 2
4n + 6
Answer:
4n+2
Step-by-step explanation:
The common difference between the terms is 4 which means that the sequence is an arithmetic sequence.
The general formula for arithmetic sequence is:
[tex]a_{n}=a_{0}+(n-1)d[/tex]
where a_n is the nth term, a_0 is the first term and d is the common difference between them.
We know that
[tex]a_{0}=6\\d=4[/tex]
Putting the value in general formula:
[tex]a_{n}=6+4(n-1)\\a_{n}=6+4n-4\\a_{n}=4n+6-4\\a_{n}=4n+2\\[/tex]
So the generalized pattern is 4n+2 ..
What is the distance between points (16, -43) and (1, 51)?
Answer:
95.1893
Step-by-step explanation:
The distance between points (16, -43) and (1, 51) is 95.1893
Simplify 5^-4 over 5^3
Answer:
5^-7
Step-by-step explanation:
5^-4 over 5^3 : 5^-4/ 5^3 = 5^-4 × 5^-3 = 5^-7
Which system of equations represents the matrix shown below ?
The answer is:
The option that represents the matrix is the option D:
[tex]3x+6y-z=8\\-2x+3y=4\\4x+5y+4z=-2[/tex]
Why?From the statement we know that the matrix is formed with the information obtained from a system of equations:
Being the values of the first column the values of the variable "x"
Being the values of the second column the values of the variable "y"
Being the values of the third column the values of the variable "z"
Being the values of the fourth column the values of the constant numbers (after the equality)
Knowing that, we are looking for a system equation that contains the following equations:
First equation:
[tex]3x+6y-z=8[/tex]
Second equation:
[tex]-2x+3y=4[/tex]
Third equation:
[tex]4x+5y+4z=-2[/tex]
Hence, we can see that the option that matches with the matrix is the option D.
[tex]3x+6y-z=8\\-2x+3y=4\\4x+5y+4z=-2[/tex]
Have a nice day!
Solve to find the value for x in the linear equation: 3(−4x + 5) = 12.
Final answer:
The linear equation is solved by distributing the number outside the parentheses, combining like terms, and then isolating the variable x. The final answer is x = 1/4.
Explanation:
To solve the linear equation 3(−4x + 5) = 12, let's follow the standard steps for solving a linear equation.
Distribute the 3 to both terms inside the parentheses: 3 × (−4x) + 3 × 5 = 12, which simplifies to −12x + 15 = 12.
Subtract 15 from both sides of the equation to get the x term by itself: −12x + 15 − 15 = 12 − 15, which simplifies to −12x = −3.
Finally, divide both sides of the equation by −12 to solve for x: −12x / −12 = −3 / −12, which simplifies to x = 1/4.
By following these steps, we've found that the value that satisfies the equation is x = 1/4.
Final answer:
To solve the equation 3(−4x + 5) = 12, distribute the 3, subtract 15 from both sides, and then divide by −12, yielding the solution x = 1/4 or 0.25.
Explanation:
To solve the linear equation 3(−4x + 5) = 12, we'll start by expanding the equation and then isolating x.
First, distribute the 3 into the parentheses: 3 × (−4x) + 3 × 5 = 12, which simplifies to −12x + 15 = 12.Next, subtract 15 from both sides of the equation to get −12x = 12 − 15, which simplifies to −12x = −3.Now, divide both sides by −12 to solve for x: x = −3 / −12, which simplifies to x = 1/4 or 0.25.Therefore, the solution to the equation 3(−4x + 5) = 12 is x = 0.25.
What is the value of k?
k = 28
k = 29
k = 31
k = 42
Answer:
k = 29
Step-by-step explanation:
(5k -3) + (9+k) = 180
5k-3+9+k = 180
6k + 6 = 180
6k = 180 - 6 = 174
k = 29
The value of k is:
k = 29
Step-by-step explanation:We know that when two angles lie on a straight line then the sum of the two angles is equal to 180 degree.
Here we have two angles on a straight line as:
first angle = (5k-3)°
and second angle= (9+k)°
Hence, we have:
(5k-3)°+(9+k)°=180°
i.e.
5k-3+9+k=180
on combining the like terms on the left hand side of the equation we have:
5k+k+9-3=180
6k+6=180
6k=180-6
6k=174
i.e.
k=174/6
i.e.
k=29
Owen has enough materials to build up to 10 birdhouses in shop class. Each birdhouse needs 12 square feet of wood. The function W(b) = 12b represents the total amount of wood that Owen would need to build b birdhouses. What domain and range are reasonable for the function?
A: D: 10 ≤ b ≤ 12
R: 0 ≤ W(b) ≤ 120
B: D: 0 ≤ b ≤ 10
R: 12 ≤ W(b) ≤ 120
C: D: 0 ≤ b ≤ 120
R: 0 ≤ W(b) ≤ 10
D: D: 0 ≤ b ≤ 10
R: 0 ≤ W(b) ≤ 120
Answer:
120
Step-by-step explanation:
A: D: 10 ≤ b ≤ 12
R: 0 ≤ W(b) ≤ 120
B: D: 0 ≤ b ≤ 10
R: 12 ≤ W(b) ≤ 120
C: D: 0 ≤ b ≤ 120
R: 0 ≤ W(b) ≤ 10
D: D: 0 ≤ b ≤ 10
R: 0 ≤ W(b) ≤ 120
W(b) = 12b.
he has enough to build 10 birdhouses, he doesn't have for more than that, he can either build no birdhouses or build 10 birdhouses, since "b" is the independent variable and thus the domain will come from it, what values can "b" safely take? "b" can be either 0 or more than 0 but nor more than 10, because Owen doesn't have enough for more than that, 0 ≤ b ≤ 10.
let's say owen chooses to build 0 birdhouses, then W(0) = 12(0) => W(0) = 0.
let's say owen chooses to build 10 birdhouses, then W(10) = 12(10) => W(10) = 120.
so the amount of wood needed for those birdhouses, namely the range, can be either 0, if he chooses to build none, or 120 if he chooses to build 10, 0 ≤ W(b) ≤ 120.
Identify the constant in the expression helppppp
For this case we have that by definition, a quadratic expression is of the form:
[tex]ax ^ 2 + bx + c[/tex]
Where "c" represents the constant term.
Then, given the following expression:
[tex]4h ^ 7- \frac {h} {3} + \frac {1} {2}[/tex]
The constant term is given by:
[tex]\frac {1} {2}[/tex]
Answer:
Option D
Which module represents that equation?
Answer:
the one on the bottom left
Step-by-step explanation:
Note that the cube on the bottom left is composed of
4 × 4 × 4 = 64 ← unit cubes
Thus the volume of the cube = 64 units³
The volume of a cube = s³ ← where s is the side length
Thus s³ = 64
To find s given the volume take the cube root of both sides, that is
s = [tex]\sqrt[3]{64}[/tex] = 4
I need help on solving these types of geometry problems! Teacher said the answer is 7 but I have to show work. Thank you!
The vertex where the two triangles touch forms a pair of vertical angles, so that the angles on opposites sides of the vertex are congruent. You're shown that two legs of both triangles are congruent. All this tells you that the two triangles are isosceles, and furthermore that they are similar because of the congruence of their "base" angles.
This means
[tex]82^\circ=m\angle 2[/tex]
[tex]\implies82=10x+12[/tex]
[tex]\implies10x=70[/tex]
[tex]\implies\boxed{x=7}[/tex]
A taxi cab charges an initial fee of $4 and an additional fare of $0.25 per mile of travel. In the function that represents this example, if the dependent variable is
the cost of the cab fare, what would be the independent variable?
Answer:
amount of miles traveled
Step-by-step explanation:
The dependent variables depends on another variable.
What that variable depends on is called the independent variable.
So the cost of the cab fare depends on the mile traveled variable.
The amount of miles traveled is the independent variable because the cost of the cab fare depends on it.
Answer:
The independent variable is the initial fee of $4
Step-by-step explanation:
Initial fee of $4
Additional fare of $0.25 per mile
The Martin's swimming pool is a square and is in the center of a square plot that is 35 meters on a side. They have 1,104 square meters of lawn. How long is a side of the pool?
Answer:
side of the pool = 11 m
Step-by-step explanation:
Square Plot:
side = 35 m
Area = 35 * 35 = 1225 sq.m
Area of lawn = 1104 sq.m
Swimming pool:
Area of the Swimming pool = 1225 - 1104 = 121 sq.m
side * side = 121 = 11 * 11
side = √11 * 11
side of the pool = 11 m