Equations and Inequalities

When you graph an inequality, a closed dot is used when you use which of these symbols?

• ≤, ≥

• <, >

Match the graph with its inequality.

• a > 11

• a < 11

• a ≥ 11

• a ≤ 11

Solve the equation:

½x = 6

• x = 12

• x = 18

• x = 3

• x = 16

x + 12 = 20

• x = 32

• x = -32

• x = 8

• x = -8

Solve the equation:

20.5 = x + 4

• 16.5

• 16.05

• 24.5

• 24.05

Solve:
3(x - 2) = 18

• 6.7

• 4

• 8

• -4

Monica earns $363 a week. Rachel works for $8.25 an hour.Which inequality represents how many hours must Rachel work to make as much as or more than Monica?

• 363≥8.25h

• 363<8.25h

• 363≤8.25h

• 363>8.25h

Pheobe has $500 in a savings account at the beginning of the summer. She wants to have at least $200 in account by the end of the summer. She withdraws $25 each week for food, clothes, and movie tickets. Write an inequality that represents Pheobe's situation.

• 200+25w ≥ 500

• 500-25w ≥ 200

• 500+25w ≤ 200

• 200-25w ≤ 500

The model represents an equation. What value of x makes the equation true?

• 2.50

• -2.25

• 2.25

• -2.50

What value of x makes this equation true?

• 3

• -9

• -1

• 27