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puteri [66]
3 years ago
9

2) Zoe was practicing for a marathon. She practiced for six days, running

Mathematics
1 answer:
Volgvan3 years ago
5 0

Answer: zoe ran 24 miles

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Let f(x)=2x+2. solve f^-1(x) when x=4
BlackZzzverrR [31]
F⁻¹(x) is the notation for the inverse of an equation, so you just need to find the inverse equation. that's found by swapping your x and y variables:

<span>f(x) = 2x + 2  ... replace f(x) with y
y = 2x + 2  ... swap x and y variables
x = 2y + 2  ... solve for y

x = 2y + 2  ... subtract 2
x - 2 = 2y  ... divide by 2
(x - 2)/2 = y

so, </span>f⁻¹(x) = (x - 2)/2  ... now you need to solve that for when x = 4. plug it in:

f⁻¹(x) = (4 - 2)/2  ... simplify the top of the fraction
f⁻¹(x) = 2/2
f⁻¹(x) = 1 is your answer.
3 0
3 years ago
Can you please help with expression and equations
Nana76 [90]
This video might help you because it helped me https://www.khanacademy.org/math/algebra/one-variable-linear-equations/alg1-intro-equations/v/variab...
7 0
4 years ago
What is the area of the rectangle? shoe your work! do not round anything until the very end and round your final answer to the t
weeeeeb [17]

Answer:

The area of the rectangle is 42 units^2

Step-by-step explanation:

we know that

The area of rectangle is equal to

A=LW

In this problem

AB=DC

BC=AD

see the attached figure with letters to better understand the problem

we have that

L=BC\\W=AB

the formula to calculate the distance between two points is equal to

d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}

we have the points

A(2,-1),B(5,2),C(12,-5),D(9,-8)

<em>Find out the distance BC</em>

we have

B(5,2),C(12,-5)

substitute in the formula

d=\sqrt{(-5-2)^{2}+(12-5)^{2}}

d=\sqrt{(-7)^{2}+(7)^{2}}

d_B_C=\sqrt{98}\ units

<em>Find out the distance AB</em>

we have

A(2,-1),B(5,2)

substitute in the formula

d=\sqrt{(2+1)^{2}+(5-2)^{2}}

d=\sqrt{(3)^{2}+(3)^{2}}

d_A_B=\sqrt{18}\ units

<em>Find out the area</em>

A=(L)(W)

we have

L=d_B_C=\sqrt{98}\ units

W=d_A_B=\sqrt{18}\ units

substitute

A=(\sqrt{98})(\sqrt{18})=42.0\ units^2

4 0
4 years ago
Help me pls, I tried to do it and got the incorrect Anwser
dedylja [7]
It would be option 4) 2 because the line is perpendicular hope this helps!!
6 0
3 years ago
Read 2 more answers
Please answer this fast Will mark brainiest
OLEGan [10]

Answer:

20 <h<30

Step-by-step explanation:

There are 30 plants so the medians is 30/2 = 15, between the 15 and 16 items

15 and 16th items are in the range 20 to 30, so the median is between 20 to 30

20 <h<30

3 0
3 years ago
Read 2 more answers
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