Equations and Inequalities

4x + 2(x - 6) = 12

• x = 6
• x = 4
• x = 2
• x = -2

solve 5(6 + 3r) + 7 ≥ 127

• r ≤ 6

• r ≥ 6

• r ≤ -6

• r ≥ -6

Find the error in the problem below

19 - 2k = 3k - 1

+3k +3k

19 + 1k = -1

-19 -19

k = -20

• They should have divided by 1 for the last step

• They should add 19 instead of subtracting 19

• I can not find an error

• Instead of adding 3k they should subtract 3k

Solve:

2(2x + 3) = -6(x + 9)

• x = 1.2

• x = 6

• x = -6

• x = 7.5

Solve: 5x + 34 = -2(-7x + 1)

• x = -4

• x = 9

• x = 4

• x = 36/19

When you graph an inequality, you use a closed dot when you use which symbols?

• ≤, ≥ 
• <, >
• ≤, <
• ≥, >

Match the graph with its inequality.

• b > –2
• b < –2
• b ≥ –2
• b ≤ –2

What inequality does the number line graph represent?

• x ≤ -4
• x ≥ -4
• x < -4
• x < 4

What inequality does the number line graph represent?

• x > 5
• x < −5
• x ≥ 5
• x ≥ −5

Which graph matches the inequality
k < 3?

• A
• B
• C
• D