Algebraic Modeling

4(1/2x - 3) = 8

• x = 10
• x = 5.5
• x = 2.5
• x = 2

-4.3x + 5 > -7.9

• x > 3
• x < 3
• x > 2/3
• x < 2/3 

7(x - 1) = 5x + 3

• x = 4
• x = 2
• x = 5
• x = 3

The scale drawing of a house shows that 1 inch is 8 feet.  The actual length of the living room is 12 feet.  On the scale drawing, how many inches is the living room.

• 0.67 inches
• 96 inches
• 1.5 inches
• 20 inches

Which is equivalent to x - 2(y + 2x)?

• -2y - 3x
• -2y + 5x
• -7xy
• 2y + 4x

Which best describes 5 < 3x - 13

• numbers less than 6
• numbers less than -3
• numbers greater than 6
• numbers greater than -3

Solve for x.
6.8 = x/2 + 2.3

• x = 9
• x = 18.2
• x = 2.25
• x = 4.55

Solve the inequality for x.
5(x + 4) < 35

• x < 3
• x < 7
• x < 4
• x < 6

Dan pays $60 per month for internet and paid a sign up fee of $90.  He has already paid a total of $450. (A) Write an equation to represent the situation. (B) How many months has he had internet?

• A: 60 + 90x = 450, B: 6 months
• A: 60x + 90 = 450, B: 6 months
• A: 60x + 90 = 450, B: 4 months
• A: 60 + 90x = 450, B: 4 months

Solve for y.
-3x + y = 12

• y = 3x + 12
• y = 9x
• y = 12 - 3x
• y = 15x