Answer:
x=40
Step-by-step explanation:
Answer:
The correct expression for the perimeter is 
see the explanation
Step-by-step explanation:
The complete question in the attached figure
Let
L ----> the length of rectangle
W ---> the width of rectangle
we know that
The perimeter of rectangle is equal to

In this problem we have


substitute the values



Simplify

so
Michelle didn't multiply the sum of length and width by 2
Answer:
True
Step-by-step explanation:
Yes, we always assume the radical is a square root if there is no index
Point slope is y-y1= m(x-x1) where m is slope and x1 and y1 are the known coordinates.
y-(-9)=-2(x-10)
y+9=-2(x-10)
Final answer: y+9=-2(x-10)

You can see it's a geometric sequence because the ratio is constant (

).
The nth term of a geometric sequence:


It has to be the sum for term 4 through term 15, so n=4 and the number above the sigma is 15.
Your answer: