Answer:
30
Step-by-step explanation:
Let's say x is the number of friends he has
4 · x = 121 - 1
4x = 120
Divide by 4 on each side
x = 30
Step-by-step explanation:
1) Find the side lengths first by the Pythagorean theorm.
2) Multiply or square that # (since its a square) to get the area
(#'s coordinate in the pictures)
Step-by-step explanation:
(2ab-7a-4) - (7ab-4)
= 2ab - 7a - 4 - 7ab +4
(-) × (-) = (+)
(-) × (-) = (+)-(-4)= +4
then 4 will be cancelled
= 2ab - 7ab - 7a
= -5ab -7a
Answer:
Step-by-step explanation:
In the image below.
I hope I've helped you.