8.18 Inequalities

−5z − 7 ≤ 3

• 22

• -2

• 0

• 18

Match the graph with its inequality.

• a > 11
• a < 11
• a ≥ 11
• a ≤ 11

Which graph shows the solutions to 18 ≥ 5k + 4k

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• -5

• 10

• -6

• -8
  
  

• -3

Find the error in the problem. Which step was the error made in?

• Step 1

• Step 2

• Step 3

• Step 4

• x = -6

• x < 6

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Which graph shows the solutions to 18 ≥ 5k + 4k

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Joan needed $100 to buy a graphing calculator for her math class. Her neighbor will pay her $5 per hour to babysit and her Father gave her $10 for mowing the lawn. Which inequality represents the minimum amount of hours she will need to babysit in order for her to buy her calculator?

• 5x + 10 ≥ 100
• 5x - 100 ≥ 10
• 10x + 5 ≤ 100
• 5x + 10 > 100

You borrow $200 from a friend to help pay for a new laptop computer. You pay your friend back $12 per week. Write and solve an inequality to find when you will owe your friend less than $56.

Which one of the following inequalities would be the correct answer?

• x < 12

• x > 12

• x < 21

• x > 21