Solving Equations and Inequalities

Do I need to flip my sign?
-3x  ≥ 12

• Yes

• No

21 = 9x+3

• x = 45

• x = 3

• x = 2

• x = 21

Pick the correct letter for:
6 > x

• A

• B

• C

• D

Which expression represents four less than half a number, n

• 4-1/2n

• 1/2n-4

• 1/2(4-n)

• 1/2(n-4)

Jim paid a gym membership fee of $50, plus $20 per month. Jim has paid a total of $290 to the gym. How many months has he been a member at the gym?

• 12

• 17

• 64.5

• 15

Solve the system of equations.
y = 4x+1
3x + 2y = 13

• (1, 5)

• (5, 1)

• (0.25, 2)

• ∅

Solve the following system
x + 9y = 8
-6x - 9y = -3

• (1,-1)

• (1,1)

• (-1,1)

• (-1,-1)

Alexandra finds that she can give 3 haircuts and 2 hair dyes in 315 minutes. Giving 2 haircuts and 4 hair dyes takes 450 minutes.  Which system of equations represents the situation?

• 3x + 2y = 315
  2x + 4y = 450

• 3x + 2y = 450
  2x + 4y = 315

• 2x + 2y = 315
  3x + 4y = 450

Solve for x and y
3x + 2y = 16
7x + y = 19

• (-2,5)

• (-2,-5)

• (2,-5)

• (2,5)

Solve the system of inequalities by graphing.

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