Unit 4 Study Guide

Find the GCF of 18 and 48.

• 2

• 3

• 6

• 12

Find the LCM of 6 and 15.

• 30

• 60

• 90

• 45

• 10

• 15

• 17

• 19

Sarah earns $15 for per hour she works. If she works for h hours, what is the expression for her total earnings?

• 15 + h

• 15h

• 15/h

• h/15

John has a collection of x marbles. He gives away 5 marbles to his friend. How many marbles does John have left?

• x - 5

• x + 5

• 5 - x

• x

Evaluate the expression: 16x - 7 + y

if x=5 and y=7

• 74

• 75

• 80

• 77

Evaluate the expression: x²(y + 2) - 81

if x=5 and y=7

• 140

• 100

• 144

• 196

Choose all the expressions that are equivalent to: (24x + 12)

• 2(12x) + 9 + 3

• 17x + 7x + 12

• 6(4x - 2)

• 3 (8x + 4)

Find the sum of: 7 ¾ + 5 ½

• 13 ¼

• 12 ¾

• 13 ½

• 13

• constant

• • + / -

• exponent

• 5

• variable

• k

• coefficient

• operations

• 2