Answer and Step-by-step explanation:
Since we have given that
Time Average age of a marriage
0 10
10 11.2
20 13.9
30 17.2
40 29
We need to show that the above data indicated a non linear model.
For this it is enough to show that slope is different:
So, we consider the slope for first 2 points:
(0,10) and (10,11.2)
So, slope becomes
[tex]m_1=\dfrac{y_2y_1}{x_2-x_1}=\dfrac{11.2-10}{10-0}=\dfrac{1.2}{10}=0.12[/tex]
and similarly, (10,11.2) and (20,13.9)
[tex]m_2=\dfrac{y_2-y_}{x_2-x_1}\\m_2=\dfra{13.9-11.2}{20-10}=\dfrac{2.7}{10}=0.27[/tex]
so, [tex]m_1\neq m_2[/tex]
So, it becomes non linear model.
If w represents the width of a rectangle with a length of 12 centimeters and an area of 590 square centimeters, what is the best algebraic equation?
a) 590=12w
b) 590=2w+24
c)590=12+w
The formula for the area of a rectangle is...
Area = length x width
A = L x W
What we know so far...
Area is 590 cm^2
length is 12 cm
width is unknown
Plug all of these into the equation for area of a rectangle:
590 = 12 * w
or
590 = 12w
Letter A is the correct answer
Hope this helped!
~Just a girl in love with Shawn Mendes
4 yards of woolen fabric costs $30.00 more than 6 yards of silk fabric. How much does the silk cost if the cost of the silk is $25.00 less than the cost of the wool?
Answer:
Cost of yard silk fabric : $35
Cost of yard of woolen fabric: $60
Step-by-step explanation:
This problem must be represented as a linear system of equations
Let
x = the cost of 1 yard of woolen fabric
y = the cost of 1 yard of silk fabric
The problem tells us
4 yards of woolen fabric costs $30.00 more than 6 yards of silk fabric.
4.x = 6.y + 30
cost of the silk is $25.00 less than the cost of the wool
y = x - 25
The system of equations is
4x - 6y = 30
x - y = 25
If we solve this system of equations using a calculator or computational tool, we get the following values
x = $60
y = $35
Camilla borrows a book from the library for ddd days. The library charges a late fee of 0.100.100, point, 10 dollars per day that the book is late.
If Camilla returns the book more than 212121 days after she borrowed it, the expression 0.10(d-21)0.10(d−21)0, point, 10, left parenthesis, d, minus, 21, right parenthesis represents the total late fee Camilla owes.
What does (d-21)(d−21)left parenthesis, d, minus, 21, right parenthesis represent in this context?
Answer:
(d -21) is the number of days the book is late
Step-by-step explanation:
There is no fee if the book is returned within 21 days, so d-21 represents the number of "late days" for which a fee is charged.
Answer:
(d -21) is the number of days the book is late
Step-by-step explanation:
Nia has $19.50 to ride the subway around New York. It will cost her $0.75 every time she rides. Identify the dependent variable and independent variable in this scenario.
A.) The number of rides and the total cost are both independent variables.
B.) The number of rides and the total cost are both dependent variables.
C.) The number of rides is the independent variable, and the total cost is the dependent variable.
D.) The total cost is the independent variable, and the number of rides is the dependent variable.
Answer:
The correct answer is B. The number of rides and the total cost are both dependent variables, as both depend on the amount of money that Nia has.
Step-by-step explanation:
Both the number of rides and the total cost are variables that depend on the amount of money that Nia has. This is so because the passage has a cost, and that cost can not exceed the amount of money that Nia has, because if she exceeds her $ 19.50 she won't be able to pay the ticket. Then, Nia has a possible amount of 26 rides as maximum (19.5 / 0.75 = 26), and the maximum total cost that can be paid is $ 19.50.
Final answer:
The correct answer is: C) The number of rides is the independent variable, and the total cost is the dependent variable.
Explanation:
In the scenario where Nia has $19.50 to ride the subway around New York, at a cost of $0.75 per ride, the correct identification of the dependent and independent variables is crucial for understanding the relationship between these quantities.
The independent variable is the number of rides Nia can take. This is because it is the variable over which we have control or can set at different levels; in other words, Nia decides how many trips she takes.
The dependent variable is the total cost of these rides. The cost depends on how many rides she takes, changing accordingly with that number.
Therefore, the correct answer is: C) The number of rides is the independent variable, and the total cost is the dependent variable.
the sum of two numbers is 68.the smaller number is 8 less than the larger number what are the numbers
Answer:
30 and 38
Step-by-step explanation:
If x is the smaller number and y is the larger number:
x + y = 68
x = y - 8
Solve with substitution:
y - 8 + y = 68
2y = 76
y = 38
x = 30
So the two numbers are 30 and 38.
Answer:
Smaller number = 30
Larger number = 38
Step-by-step explanation:
68 = (x+8) + x
68 = 2x - 8
60 = 2x
30 = x
and
68 = (x-8) + x
68 = 2x - 8
76 = 2x
38 = x
How do you solve x^4 - 3x^3 - 3x^2 - 75x - 700
Answer:
= (x +4)(x -7)(x^2 +25)
roots are -4, 7, ±5i
Step-by-step explanation:
You have not said what "solve" means in this context. An expression by itself doesn't have a solution. We have assumed you want to find the factoring and/or roots of it.
I like to use a graphing calculator to find the real roots. For this expression, there are two of them, one positive and one negative. (You know there will be one positive real root, and at least one negative real root, from Descartes's rule of signs.)
Then those roots can be factored out and the solution to the remaining quadratic determined. That factoring can occur by polynomial long division, synthetic division, or other means.
I like to see what happens when I plot the graph of the function divided by the known factors. (We expect a parabola that doesn't cross the x-axis.) The vertex of that parabola can be used to find the remaining roots.
The x-intercepts of the given expression are -4 and +7, so two of the factors are (x+4) and (x-7). Dividing these from the given expression (by synthetic division or other means) gives (x^2 +25). This only has imaginary roots (±5i).
____
If you're constrained to doing this "by hand" with only a scientific calculator, Descartes's rule of signs tells you there is one positive real root. (Only one sign change in the sequence of coefficient signs: +----.)
The rational root theorem tells you it will be a divisor of 700. Various estimates of the maximum magnitude of it will tell you it is probably less than 14 (easily checked). So, the numbers you can test as roots would be 1, 2, 4, 5, 7, 10, 14. You will find that 7 is a root, and then you can reduce the problem to the cubic x^3 +4x^2 +25x +100.
When odd-degree term signs are changed, there will be 3 sign changes (-+-+), hence at least one negative real root. The rational root theorem tells you it is a divisor of 100, so possible choices are -1, -2, -4, -5. By trial and error or other means, you can find the root to be -4. Then the problem reduces to the quadratic x^2 +25.
Roots of that are ±√(-25) = ±5i.
This process generally entails a fair amount of trial-and-error work, which is why I prefer one that makes some use of technology.
_____
We have presumed you have some familiarity with ...
Descartes's rule of signsRational Root Theoremsynthetic divisionThis will usually be the case when you're presented with problems like this. If you need additional information on any of these, it is readily available on the internet (and probably also in your reference material).
add 5/9 and 5/6, then subtract 2/3 from the sum. please show work
Answer:
13/18
Step-by-step explanation:
We need to get a common denominator for 9,6,3
That would be 18
5/9 *2/2 = 10/18
5/6 * 3/3 = 15/18
2/3 *6/6 = 12/18
5/9+5/6 = 10/18 +15/18 = 25/18
Then
25/18 - 2/3 = 25/18 - 12/18 = 13/18
I will mark Brainliest The radius of a sphere is 7 feet. Which formula can be used to find the surface area of the sphere? A = 4?(7)3 A = 3?(7)2 A = 3?(7)3 A = 4?(7)2
Answer:
A = 4π(7)^2
Step-by-step explanation:
The formula for the area of a sphere is ...
A = 4πr^2 . . . . . . for radius r
When the radius is 7 feet, the value 7 goes where r is in the formula:
A = 4π·7^2 . . . . . square feet
help me, anyone???...
Answer:
x = 34
Step-by-step explanation:
The 3 given angles form a straight angle and sum to 180°, hence
x + 12 + 100 + x = 180
2x + 112 = 180 ( subtract 112 from both sides )
2x = 68 ( divide both sides by 2 )
x = 34
Answer:
x=34
Step-by-step explanation:
Alright.
x+12+100+x=180
2x+112=180
2x=68
x=34
which of the va;ues of P and Q result in an equation with no solutions? Qx+P=33x+25
Answer:
Step-by-step explanation:
No solution means that the 2 lines will never intersect in a coordinate plane. The only kinds of lines that can exist within the same coordinate plane and never intersect are lines that are parallel. The slopes have to be the same for lines to be parallel. The y-intercept, or where they go through the y axis, won't be the same, but the value of the slope has to be. The slope of the equation on the right is 33, so if these lines are parallel, then Q has to equal 33. P can then be any real number NOT equal to 25.
Which function is quadratic function? a(x) = –2x^3 + 2x – 6 b(x) = 5x^3 + 8x^2 + 3 c(x) = –8x^2 + 3x – 5 d(x) = 6x^4 + 2x – 3
Answer:
c(x) = –8x^2 + 3x – 5 is a quadratic function.
Step-by-step explanation:
At first, we will define what a quadratic function is.
A quadratic function is a polynomial with one or more variables with degree 2.
So, from the given functions
a(x) = -2x^3+ 2x – 6 has highest degree 3. So it is not a quadratic function.
b(x)=5x^3 + 8x^2 + 3 has highest degree 3. So it is not a quadratic function.
c(x) = –8x^2 + 3x – 5 has highest degree 2. So it is a quadratic function.
d(x) = 6x^4 + 2x – 3 has highest degree 4. So it is not a quadratic function.
Answer:
Step-by-step explanation:
Shayla has 6 1/2 pounds of potato salad into containers each of which holds 1 5/8 pounds. How many containers does she need?
let's firstly convert the mixed fractions to improper fractions and then divide.
[tex]\bf \stackrel{mixed}{6\frac{1}{2}}\implies \cfrac{6\cdot 2+1}{2}\implies \stackrel{improper}{\cfrac{13}{2}}~\hfill \stackrel{mixed}{1\frac{5}{8}\implies \cfrac{1\cdot 8+5}{8}}\implies \stackrel{improper}{\cfrac{13}{8}} \\\\[-0.35em] ~\dotfill[/tex]
[tex]\bf \stackrel{\textit{total salad}}{\cfrac{13}{2}}\div \stackrel{\stackrel{\textit{conainer's}}{\textit{capacity}}}{\cfrac{13}{8}}\implies \cfrac{\begin{matrix} 13 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}}{\underset{1}{\begin{matrix} 2 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}}}\cdot \cfrac{\stackrel{4}{\begin{matrix} 8 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}}}{\begin{matrix} 13 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}}\implies 4[/tex]
Duane is filing his federal income tax return with the 1040EZ form using the Single filing status, and nobody can claim him as a dependent. If he had wages, salaries, and tips of $37,400, taxable interest of $160, and no unemployment compensation, what should he enter on line 6 of the Income section below?
Answer:
$27410
Step-by-step explanation:
Duane is filing his federal income tax return with the 1040EZ form using the Single filing status, and nobody can claim him as a dependent. If he had wages, salaries, and tips of $37,400, taxable interest of $160, and no unemployment compensation, what should he enter on line 6 of the Income section below?
form 1040EZ is the form used for paying tax by the Inland Revenue Services(IRS)
Line 6 of the 1040EZ from will contain taxable income
so he will fill
$27410
His taxable income is when standard deductions and deductions for exemption is subtracted from the total income
37,400+160-(6200+3950)
$27410
1040EZ form
Filing status and income:,
Filing status: Single
Are you someone's dependent?: No
Wages, salaries, tips, etc:
$37,400
Taxable interest:
$160
Unemployment compensation:
$0
Standard deduction:
$6,200
Deduction for exemptions:
$3,950
Taxable income:
$27,410
Federal income tax withheld:
$0
Answer:
28,210
Step-by-step explanation:
just answered it
Need help with a math question
Answer:
[tex]x =26\°[/tex]
Step-by-step explanation:
For this case we have 2 secant lines and an exterior angle x.
Then by definition the measure of the outer angle is equal to half the difference of the arcs formed by the sides.
This means that the angle x is equal to:
[tex]x =\frac{66\°-14\°}{2}\\\\x =26\°[/tex]
the answer is:
[tex]x =26\°[/tex]
Find the radius and center of the circle given by the equation below. (x – 6)2 + (y + 4)2 = 7 r = 7 and center at (-6, 4) r = 7 and center at (6, -4) r = √7 and center at (-4, 6) r = √7 and (6, -4)
Answer:
center at (6, -4) r = √7
Step-by-step explanation:
(x – 6)^2 + (y + 4)^2 = 7
This is in the form
(x – h)^2 + (y - k)^2 = r^2
Where (h,k) is the center of the circle and r is the radius of the circle
Rearranging the equation to match this form
(x – 6)^2 + (y -- 4)^2 = sqrt(7) ^2
The center is at (6, -4) and the radius is the sqrt(7)
Answer:
center at (6, -4) r = √7
Step-by-step explanation:
(x – 6)^2 + (y + 4)^2 = 7 This is in the form (x – h)^2 + (y - k)^2 = r^2 Where (h,k) is the center of the circle and r is the radius of the circle Rearranging the equation to match this form (x – 6)^2 + (y -- 4)^2 = sqrt(7) ^2 The center is at (6, -4) and the radius is the sqrt(7)
Use function notation to write a recursive formula to represent the sequence: 4, 8, 12, …
A.f(n) = f(n − 1) + 4
B.f(n) = f(n − 1) + 2
C.f(n) = f(n − 1) ⋅ 4
D.f(n) = f(n − 1) ⋅ 2
Answer:
A.f(n) = f(n − 1) + 4
Step-by-step explanation:
4+4 = 8
8+4 = 12
We are adding 4 to the term before it
f(n) = f(n-1) +4
Answer: A.f(n) = f(n − 1) + 4 Hope this helps :)
BRAINLIEST !!!!!
ms.wolf earns a salary of $50,000 per year plus a 4% commission on her sales. the average price of a share she sells is $50.
write an inequality to describe how many shares ms. wolf must sell to make an annual income of at least $70,000.
Answer:
[tex]2x + 50,000 \ge 70,000[/tex].
[tex]x \ge 10,000[/tex].
Step-by-step explanation:
What's the total income of Ms. Wolf in a year?
The annual income of Ms. Wolf comes in two parts:
The fixed salary of $50,000, andThe 4% commission on shares she sold.How many commission does Ms. Wolf receive for each share she sold? [tex]\$\;50 \times 4\% = \$\;50 \times 0.04 = \$\;2[/tex].
Let the number of shares that Ms. Wolf sold be [tex]x[/tex]. Ms. Wolf will receive a commission of [tex]\$\;2x[/tex].
Total annual income of Ms. Wolf: [tex]\$\; (50,000 + 2x)[/tex].
The phrase "at least" indicates that [tex]\$\; (50,000 + 2x)[/tex] shall be greater than or equal to $70,000. That is:
[tex]\$\; (50,000 + 2x)\ge \$\;70,000[/tex].
[tex]2x + 50,000 \ge 70,000[/tex].
[tex]x \ge 20,000[/tex].
PLEASE HELP
4. The table shows the probabilities of a response chocolate or vanilla when asking a child or adult. Use the formula for conditional probability to determine independence.
Chocolate | Vanilla | Total
Adults 0.21 0.39 0.60
Children 0.14 0.26 0.40
Total 0.35 0.65 1.00
a. Are the events “Chocolate” and “Adults” independent? Why or why not?
b. Are the events “Children” and “Chocolate” independent? Why or why not?
c. Are the events “Vanilla” and “Children” independent? Why or why not?
Answer:
All events are independent
Step-by-step explanation:
You are given the table
[tex]\begin{array}{cccc}&\text{Chocolate}&\text{Vanilla}&\text{Total}\\\text{Adults}&0.21&0.39&0.60\\\text{Children}&0.14&0.26&0.40\\\text{Total}&0.35&0.65&1.00\end{array}[/tex]
Two events A and B are independent when
[tex]Pr(A\cap B)=Pr(A)\cdot Pr(B)[/tex]
a) A="Chocolate"
B="Adults"
A and B="Chocolate and Adults"
[tex]Pr(A)=0.35\\ \\Pr(B)=0.60\\ \\Pr(A\cap B)=0.21[/tex]
Since [tex]0.35\cdot 0.60=0.21[/tex] events are independent
b) A="Children"
B="Chocolate"
A and B="Children and Chocolate"
[tex]Pr(A)=0.40\\ \\Pr(B)=0.35\\ \\Pr(A\cap B)=0.14[/tex]
Since [tex]0.40\cdot 0.35=0.14[/tex] events are independent
c) A="Vanilla"
B="Children"
A and B="Vanilla and Children"
[tex]Pr(A)=0.65\\ \\Pr(B)=0.40\\ \\Pr(A\cap B)=0.26[/tex]
Since [tex]0.65\cdot 0.40=0.26[/tex] events are independent
Need help with a math question PLEASE HELP
Answer:
18%
Step-by-step explanation:
From the table you can state that:
the total number of students is 10,730the number of students receiving Finincial Aid and is Graduate is 1,879Use the definition of the probability
[tex]Pr=\dfrac{\text{The number of favorable outcomes}}{\text{The number of all possible outcomes}}[/tex]
So,
the number of favorable outcomes = 1,879the number of all possible outcomes = 10,730Hence, the probability is
[tex]Pr=\dfrac{1,879}{10,730}\approx 0.1751\approx 18\%[/tex]
I need help ASAP!!
Consider the equation below.
x^2-10x-11=0
Determine which equation has the same solutions as the given equation.
A. (x-10)^2=36
B. (x-5)^2=21
C. (x-10)^2=21
D. (x-5)^2=36
Answer:
D. (x-5)^2 = 36
Step-by-step explanation:
If you add 11 to the given equation, you get ...
x^2 -10x = 11
Then you can add the square of half the x-coefficient to complete the square.
x^2 -10x +25 = 11 +25
(x -5)^2 = 36 . . . . simplify to the appropriate form
What is the domain of the function y=2 VX-6?
Answer:
The answer in the procedure
Step-by-step explanation:
case 1) If the function is
[tex]y=2\sqrt{x-6}[/tex]
we know that
The term in the radicand must be positive
so
[tex]x-6\geq 0\\ \\x\geq 6[/tex]
therefore
The domain of the function is the interval -----> [6,∞)
All real numbers greater than or equal to 6
case 2) If the function is
[tex]y=2\sqrt{x}-6[/tex]
we know that
The term in the radicand must be positive
so
[tex]x\geq 0[/tex]
therefore
The domain of the function is the interval -----> [0,∞)
All real numbers greater than or equal to 0
What is the probability of either outcome b or d?
a. .28
c. .19
b. .38
d. .33 please select the best answer from the choices provided a b c d?
Answer:
B.38
Step-by-step explanation:
Need help with this math question
Answer:
x = 3.1 ft
Step-by-step explanation:
Use Pythagoras' Theorem to find the base of the triangle. The base of the triangle is half of 'x'. Let's call the base 'y' for now.
To find 'y' we must use this formula,
[tex]y^{2} = c^{2} -b^{2}[/tex]
'c' is the hypotenuse, the longer side, and 'b' is the other short side.
Sub in the numbers for 'c' and 'b',
[tex]y^{2} = 2.1^{2} -1.4^{2}[/tex]
= 2.45
Square root both sides to get 'y' by itself,
y = 1.5652.....
Remember that 'y' is half of x? Simply multiply 'y' by 2 to get an answer for 'x',
x = 1.5652.... x 2
= 3.1 ft (1 d.p. nearest tenth)
Hope this helped!!
50 POINTS SIMPLIFY RADICAL EXPRESSION! + BRAINLIEST TO RIGHT/BEST ANSWER
PLEASE only answer if you are POSITIVE!!
Answer:
.5b
Step-by-step explanation:
( .125 b^3) ^ 1/3
We know that ( xy) ^c = x^c * y ^c
( .125) ^ 1/3 (b^3) ^ 1/3
Rewriting .125 as .5^3
( .5^3) ^1/3 ( b^3) ^ 1/3
We know that a^c^d = a^(c*d)
.5 ^ (3*1/3) b ^ (3*1/3)
.5 b
The length of a parking Lot is 5 yards more than the width. If the area of the parking lot is 66 square yards, find the dimensions of the parking lot.
Answer:
6 yards by 11 yards
Step-by-step explanation:
Factors of 66 are ...
66 = 1·66 = 2·33 = 3·22 = 6·11
The last pair of factors differ by 5, so represent the solution to the problem.
The width of the parking lot is 6 yards; the length is 11 yards.
Final answer:
The parking lot's dimensions are found by setting a quadratic equation w × (w + 5) = 66 based on its area. Solving for w, the width is 6 yards, hence the length is 11 yards, making the dimensions 6 yards by 11 yards.
Explanation:
To find the dimensions of the parking lot when the length is 5 yards more than the width and the area is 66 square yards, we can set up an equation based on the area of a rectangle (area = length × width). We can define the width as w and the length as w + 5 since the length is 5 yards more than the width.
The equation representing the area will then be:
w × (w + 5) = 66
Solving this quadratic equation (w^2 + 5w - 66 = 0) by factoring or using the quadratic formula, we find that w = 6 or w = -11. We discard the negative value since a width cannot be negative, so the width is 6 yards and the length is 11 yards (since it's 5 yards more than the width).
Therefore, the dimensions of the parking lot are 6 yards by 11 yards.
PLEASE HELP!
Point A is located at (-2, 2), and D is located at (4, -2). Find the coordinates of the point that lies halfway between A and D.
1) (0, 1)
2) (-1, 1)
3) (1, 0)
4) (1, 1)
Answer:
3) (1, 0)
Step-by-step explanation:
The midpoint can be computed as the average of the coordinates.
M = (A + D)/2 = ((-2, 2) +(4, -2))/2 = ((-2+4)/2, (2-2)/2) = (1, 0)
The midpoint is (1, 0).
___
This is also easily seen on a graph of the points.
Determine whether the given value is a statistic or a parameter. A homeowner measured the voltage supplied to his home on a random sample of 34 days, and the average (mean) value is 126.5 volts. Choose the correct answer below. A. The given value is a parameter for the year because the data collected represent a sample. B. The given value is a statistic for the year because the data collected represent a population. C. The given value is a statistic for the year because the data collected represent a sample. D. The given value is a parameter for the year because the data collected represent a population
Answer:
5 but its probaly not right bc im just looking for pointsStep-by-step explanation:
What is the value of x when y is 21
Answer:
7
Step-by-step explanation:
7 x 3 = 21
How to tell if a function is even or odd from a graph
Answer:
if u can divide it to two
Step-by-step explanation:
a. Plot the data for the functions f(x) and g(x) on a grid and connect the points.
x -2 -1 0 1 2 x -2 -1 0 1 2
f(x) 1/9 1/3 1 3 9 g(x) -4 -2 0 2 4
b. Which function could be described as exponential and which as linear? Explain.
c. If the functions continue with the same pattern, will the function values ever be equal? If so, give estimates for the value of x that will make the function values equals. If not, explain why the function values will never be equal.
Answer:
a) see the plots below
b) f(x) is exponential; g(x) is linear (see below for explanation)
c) the function values are never equal
Step-by-step explanation:
a) a graph of the two function values is attached
__
b) Adjacent values of f(x) have a common ratio of 3, so f(x) is exponential (with a base of 3). Adjacent values of g(x) have a common difference of 2, so g(x) is linear (with a slope of 2).
__
c) At x ≥ 1, the slope of f(x) is greater than the slope of g(x), and the value of f(x) is greater than the value of g(x), so the curves can never cross for x > 1. Similarly, for x ≤ 0, the slope of f(x) is less than the slope of g(x). Once again, f(0) is greater than g(0), so the curves can never cross.
In the region between x=0 and x=1, f(x) remains greater than g(x). The smallest difference is about 0.73, near x = 0.545, where the slopes of the two functions are equal.
Answer:
b. The function f(x) appears exponential because its graph approaches but does not cross the negative x-axis, while growing at a faster and faster rate to the right (or precisely: as x increases by 1, the value gets multiplied by the same constant, 3.) The function g(x) is linear since g(x) increases by the same amount as x increases in steps of one unit.
c. The graph appears to show that the functions do not intersect, so the function values will not be equal. The function f is already above the function g and it is growing at a faster rate, so they cannot ever be equal.
Step-by-step explanation:
used the answer above just changed a few words and all