Pre-Algebra: Solving Equations & Ratios Challenge

A store sells pencils for $0.50 each. If you buy x pencils, how much will you spend? Write an equation to represent the total cost.

• total cost = x + 0.50

• total cost = 0.50 + x

• total cost = 0.50 / x

• total cost = 0.50 * x

If a recipe requires 2 cups of flour for every 3 cups of sugar, how many cups of flour are needed if you use 9 cups of sugar?

• 3 cups of flour

• 12 cups of flour

• 9 cups of flour

• 6 cups of flour

A car travels 150 miles on 5 gallons of gas. What is the ratio of miles traveled to gallons used?

• 40:1

• 35:1

• 30:1

• 25:1

If 4x = 20, what is the value of x?

• 6

• 10

• 4

• 5

A school has a ratio of 3 boys for every 2 girls. If there are 30 boys, how many girls are there?

• 25

• 20

• 15

• 10

You have $120 to spend on books. If each book costs $15, how many books can you buy? Write an equation to find the answer.

• 12

• 8

• 6

• 10

If a recipe calls for a ratio of 1:4 of oil to vinegar, how much oil is needed if you use 8 cups of vinegar?

• 2 cups of oil

• 1 cup of oil

• 3 cups of oil

• 4 cups of oil

A bike costs $200. If you save $25 each week, how many weeks will it take to save enough to buy the bike? Write an equation to solve for the number of weeks.

• 12 weeks

• 8 weeks

• 6 weeks

• 10 weeks

If the ratio of cats to dogs in a shelter is 5:3 and there are 15 cats, how many dogs are there?

• 9

• 6

• 12

• 15

If 3x + 5 = 20, what is the value of x?

• 3

• 7

• 5

• 10