Phillips Midterm Study Guide

4(a + 3) = -32

• -11
• -44
• -20
• -8

Which step is incorrect?

120 = 4(7a+2)

Step 1 Distribute

120 = 28a + 8

Step 2 Subtract 8 from both sides

112 = 28a

Step 3 Divide both sides by 28

a=4

• Step 1

• Step 2

• Step 3

• Problem is worked correctly

5x - 4 + 2x = 3

Mathematical Equivalence

ON

3x + 2(4x - 4) = 3

Mathematical Equivalence

ON

-4x + 14 ≤ 54

• x ≥ - 10
• x ≤ -10
• x ≥ 10
• x ≤ 10

Solve:
6x+10>5x-12

• x>2
• x<2
• x<-22
• x>-22

Solve:
3(x - 2) < 2(x + 9)

• x<24
• x>12
• x<12
• x>24

The start up cost to join eTunes music is $7.95 plus $0.95 per song downloaded.  Write a linear equation that could be used to find how many songs he downloaded.

• y = 0.95x + 7.95
• y = 7.95x + 0.95
• y = 0.95x - 7.95
• y = - 0.95x + 7.95