Proportional Relationships/Expressions /Equations TNReady Review

Which expressions is equivalent to 6(2 - 3x) - 8(4x + 1)?

• -50x + 4

• -50x + 20

• -35x + 13

• -20x - 26

A machine operator earns $20 per hour plus a weekly bonus. The expression

20h + 160 represents the weekly earnings the machine operator earns working h hours.

Which expression also represents the weekly earnings the machine operator earns working h hours?

• 20(h + 8)

• 20(h + 18)

• 20(h + 140)

• 20(h + 160)

Which expression is equivalent to -12x - 18?

• -6(2x + 18)

• -6(2x + 3)

• -6(-6x -12)

• -6(-6x - 18)

An assistant spends a total of 60 hours working one week. If the assistant spends 18 hours on scheduling travel and spends an equal amount of time, h, in hours, working on each of 3 other projects, which statement is true?

• The equation 3(h+18)=60 can be used to find h, and the assistant spends 14 hours on each of the other projects.

• The equation 3(h+18)=60 can be used to find h, and the assistant spends 2 hours on each of the other projects.

• The equation 3h+18=60 can be used to find h, and the assistant spends 14 hours on each of the other projects.

• The equation 3h+18=60 can be used to find h, and the assistant spends 2 hours on each of the other projects.

• Student 1

• Student 2

• Student 3

• Student 4

A brother and sister go to a restaurant for lunch. The brother orders p slices of pizza, and the sister orders z slices of pizza.

If the expression 2.50p + 2.50z represents the total cost of the lunch, which statement is true?

• The expression 2.50(pz) also represents the total cost of the lunch, and the total cost of the lunch is $2.50.

• The expression 2.50(pz) also represents the total cost of the lunch, and each slice of pizza costs $2.50.

• The expression 2.50(p+z) also represents the total cost of the lunch, and the total cost of the lunch is $2.50

• The expression 2.50(p+z) also represents the total cost of the lunch, and each slice of pizza costs $2.50.

The cost of yogurt in a store is proportional to the number of yogurts purchased. If each yogurt costs $1.05, which equation represents the total cost, y, of x yogurts at the store?

• x = 1.05 + y

• x = 2.10y

• y = 1.05x

• y = 2.10 + x

• (0.4, 1)

• (1, 0.4)

• (1, 2.5)

• (2.5, 1)

If 1/6 container of cement fills 3/8 of a block of sidewalk, and each block of sidewalk is the same size, which statement is true?

• It takes 3 1/7 containers of cement to fill the entire block of sidewalk.

• It takes 2 1/4 containers of cement to fill the entire block of sidewalk.

• It takes 4/9 container of cement to fill the entire block of sidewalk.

• It takes 2/7 container of cement to fill the enitre block of sidewalk.

• The relationship is not proportional because

  8.4 + 33.6 ≠= 42.

• The relationship is not proportional because the ratios of y to x vary.

• The relationship is proportional because 15-12 = 3.

• The relationship is proportional because the ratios of y to x are equivalent.