Topic 4 Test

The price of nails is $1.29/lb, the price of washers is $0.79/lb, and the price of bolts is $2.39/lb. Write an expression to represent the total price of n pounds of nails, w pounds of washers, and b pounds of bolts.

• 1.29n + 0.79w + 2.39b

• 1.29w + 0.79n + 2.39b

• 1.29b + 0.79n + 2.39w

• 1.29n + 0.79b + 2.39w

The price of nails is $1.29/lb, the price of washers is $0.79/lb, and the price of bolts is $2.39/lb.

What is the total cost of buying 2 pounds of nails, 4 pounds of washers, and 3 pounds of bolts?

• $12.91

• $13.91

• $11.91

• $14.91

During a walkathon, Team A walks a total of 6x + 12 miles and Team B walks a total of 4x – 7 miles. What is the difference in miles walked between the two teams?

• 2x – 5

• 2x + 5

• 2x – 19

• 2x + 19

Select all the expressions that are equivalent to –3/4(32 + 24e – 4f).

• 24 + 18e – 3f

• –18e + 3f – 24

• –24 – 18e + 3f

• 8 – 6e – f

Simplify the expression 2(x – 6) + 2(8).

• 2x + 4

• 2x + 2

• x + 4

• x + 2

The manager of a store marks up all items by 10%. If x is the original price, select all the expressions that represent the new price with the markup.

• 0.9x

• x

• 1.1x

• x + 0.1x

There are 10x – 8 customers in a store on Monday and 6x + 16 customers on Tuesday. What is the total number of customers for the two days?

• 4x + 24

• 4x + 8

• 16x + 24

• 16x + 8

The height of the water in a fish pond is 42.5 inches. Water is being drained from the pond at a rate of 3.75 inches per minute. What is the height of the water after 3 minutes?

• 31.25 inches

• 32.25 inches

• 33.25 inches

• 34.25 inches

Select all correct ways of factoring -5x - 15.

• -5(x + 3)

• 5(x + 3)

• -5(x - 3)

• 5(-x - 3)

Consider the expression 5b + 3c - 20 + 3b - 15c + 4. Simplify the expression.

• 8b - 12c - 16

• 5b + 3c - 16

• 8b + 12c + 16

• 5b - 12c + 16