PLEASE HELP!!!!! PLEASE

1. Define the variable in the following situation: The perimeter of a square is equal to 4 times the length of a side.

A. perimeter

B. length of side

C. square

D. 4 times


2. Write an algebraic expression for the following. the sum of 12 and 3 times a number

A. 12+3

B. 12+3n

C. 12n+3

D. 15

3. Write an algebraic expression for the following. The sum of 8 and x minus 3.

4. Which equation models the following situation? What is the number of slices of pizza left from a 12-slice pizza after you have eaten some? Let n equal the number of slices of pizza left and e equal the number eaten.

A. n + 12 = e

B. p = n + 12

C. n = e + 12

D. n = 12 - e


9. A gas and electric bill totals $324.86. If x represents the charge for electricity, which of the following expressions represents the charge for gas?

A. $324.86x

B. $324.86 + x

C. $324.86 - x

D. $324.86 / x

10. A parking garage charges $1.50 for the 1st hour of parking and $0.75 for each addtional hour. What is the cost in dollars for parking 7 hours? Show your work.

8. Evaluate the following expression for a = 2, b = 3 and c = -4:a(b - c)2

10. Evaluate the following expression for a = 6, b = 3 and c = 4.
a ÷ b + 2c