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