Quiz7.5–7.7

344 Chapter 7 Equations and Inequalities

Write the word sentence as an inequality. (Section 7.5)

1. A number x is greater than 0. 2. Twice a number c is at least − 8.

Tell whether the given value is a solution of the inequality. (Section 7.5)

3. 2n > 16; n = 9 4. x − 1 ≤ 9; x = 10

Graph the inequality on a number line. (Section 7.5)

5. y > −4 6. m ≤ 3 — 5

Solve the inequality. Graph the solution. (Section 7.6)

7. x + 4 ≤ 8 8. 18 > 16 + g

Write the word sentence as an inequality. Then solve the inequality. (Section 7.6)

9. Two less than a number is more than 15.

10. Seven more than a number is less than or equal to 27.

Solve the inequality. Graph the solution. (Section 7.7)

11. 3a —

2 < 24 12. 121 ≥ 11s

Write the word sentence as an inequality. Then solve the inequality. (Section 7.7)

13. Three times a number x is more than 18.

14. 84 is no less than 7 times a number k.

15. WATER PARK Each visit to a water park costs $19.95. An annual pass to the park costs $89.95. Write an inequality to represent the number of times you would need to visit the park for the pass to be a better deal. (Section 7.5)

16. GARDEN You want to use a square section of your yard for a garden. You have at most 52 feet of fencing to surround the garden. Write and solve an inequality to represent the possible lengths of each side of the garden. (Section 7.7)

17. DELIVERY You were planning to spend $12 on a pizza. Write and solve an inequality to represent the additional amount you must spend to get free delivery. (Section 7.6)

Progress Check

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