Answer:
f(-4) = 21
Step-by-step explanation:
f(x) = x^2 + 5
f(-4) = (-4)^2 + 5
f(-4) = 16 + 5
f(-4) = 21
First one is
2x where x equals number of people in your class
second one is
money saved = 1/2y+6 where y equals amount of money in pay check
The Y is multiplying by 2 across the X OR the X’s are being divided by 2
Ex: 3x2=6 OR 6/3=2
No because the perimeter of a rectangle is L×W or (2L+2W) , but the perimeter of a square is S×S×S×S so there is a difference between the two.