The perimeter of the rectangle is all the side lengths added up
Perimeter = 5 + 10 + 5 + 10 = 30
Hope that helps!
Answer:

Step-by-step explanation:
We are given the function:

We want to find f(3), so we must substitute 3 in for x.

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, and Subtraction.
Solve the exponent first.

Multiply 8 and 3.

Add.

For the function given, f(3) is 30.
Answer:
The numbers are 14 and 10
Step-by-step explanation:
Let the numbers be

This implies that,


The sum of the numbers is 24.

Put equation (1) in (2)





Distribute the number outside the parenthesis and do the equations in the parenthesis. If there is no sign in between the parenthesis, assume to multiply.