3. a. Write a ratio to compare the number of squares to the number of triangles.

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1 Name Class Chapter 5 Review Pre-Algebra 1. Find the missing number that makes the ratios equivalent.? Sean traveled 90 miles in 90 minutes. What was Sean s average rate of speed in miles per hour? 3. a. Write a ratio to compare the number of squares to the number of triangles. b. Write a ratio to compare the number of triangles to the number of squares. c. Write a ratio to compare the total shapes to the number of squares. d. Write a ratio to compare the total triangles to the total shapes. 4. A banana muffin recipe calls for 2 cups of mashed bananas to make 30 muffins. How many cups of mashed bananas would be needed to make 50 muffins? Use a proportion to solve the problem. 5. Justin spent $7 purchasing tomatoes. Tomatoes cost $2 per pound. How many pounds of tomatoes did Justin buy? 6. What number makes the ratios equivalent: 2 : 7 = : Find the missing number in the 2 12 proportion:? You are baking a batch of 3 dozen cookies. The recipe calls for ¾ tsp. of baking soda and 1 ½ cups of flour. What is the ratio of baking soda to flour? If you decide to triple the recipe, you know you need to use 4 ½ cups of flour. How much baking soda will you need? 9. You make $361 after working for 38 hours. What is your hourly wage?

2 10. Cereal is on sale this week. Is it a better buy to get the 10-ounce box for $2.08 or the 14-ounce box for $2.77? 11. Mrs. Bowman paid $30 for 4 students to attend a math conference. How many students can attend for $540? 12. The ratio of pistachios to almonds in a bag of nut mix is 3 : 4. Express the amount of pistachios in the nut mix as a decimal. Round your answer to the nearest hundredth. 13. A bakery sells bags of cookies that contain 7 oatmeal raisin cookies and 6 peanut butter cookies. Find the ratio of peanut butter cookies to oatmeal raisin cookies. 14. For the rectangle below, the ratio of the width to the length is 3 : 4. If the width is 12 centimeters, what is the length of the rectangle? 15. The school secretary needs to make 20 copies of a 500-page booklet by the end of the day. The school s copy machine can copy 2500 pages in one hour. How many hours will she need to complete the 20 copies? 12 cm 16. Your house is 18 feet tall and creates a shadow that is 15 feet long. The shed behind your house is 12 feet tall. How long is its shadow? 17. A motorist pays $21.75 for 15 gallons of gas. How much does gas cost per gallon?

3 Express the following ratios in simplest form baskets in 18 attempts 19. Ten out of every 30 Americans own a portable MP3 player out of 60 light bulbs DVD s out of 84 DVD s. Write each rate as a unit rate miles on 14 gallons of gasoline. 23. $11 for 4 boxes of cereal.

4 24. $12 for 15 songs doughnuts in 3 hours. 26. Find each unit price and tell which is the better buy. 12 ounces of noodles for $2.09 or 20 ounces of noodles for $ Find each unit price and tell which is the better buy. 24 ounces of juice for $2.25 or 40 ounces of juice for $3.79 Solve each proportion using cross products. 6 n m

5 30) p ) w 4.5 For the following, set up a proportion, use a variable, use cross products and solve. Label. 32) A principal is ordering pizzas for a school 33) The classrooms at Lincoln Middle pizza party. He knows that 9 pizzas will feed 25 students. If there are 300 students in the school, how many pizzas will he need to order? School are painted every summer. If 7 gallons of paint are needed to paint 4 classrooms, how many gallons of paint are needed to paint 16 classrooms? 34) The girls soccer team scored 6 goals in 14 games. At this rate, how many games would you expect it to take them to score 9 goals? 35) If you can purchase 8 gallons of spring water for $24.72, how much will you pay for 14 gallons?

6 36) A 14-inch wide by 20-inch long print of the Eiffel Tower is also available as a postcard 6 inches long. What is the width of the postcard? 37) After 5 school days, Joe has put in 12.5 hours of football practice. How many hours of practice will he have after 12 days of practice? 38) Maria walks ½ mile in ¼ of an hour. Write her speed as a unit rate. 39) Bonnie is running a relay race in track. She can run ¾ meters in ½ a minute. Write her speed as a unit rate.