1.5 practice
- 1. Name____________________________________________________________Date___________ 1.5 Practice A Evaluate the formula for the given value(s) of the variable(s). 1. M = 220 - a ; a = 14 2. A = l ´ w; l = 12 in. and w = 9 in. 3. V = lwh ; l = 8 , w = 5 , and h = 4 Use a formula to find the area of the figure. 4. 5. 6. 7. 8. 9. 10. The formula M = 220 - a gives a person’s maximum heart rate M, where a is the person’s age in years. What is the maximum heart rate of a person who is 61 years old? 11. A person’s earned run average is the average number of earned runs given up per nine innings. The formula below shows the earned run average, where R is the number of earned runs and I is the number of innings pitched. What is the earned run average of a pitcher who gave up 40 earned runs in 80 innings? Earned Run Average 9R I = 12. The area of a rectangle is 481 square inches. The length is 37 inches. Explain how you can find the width. Big Ideas Math Green Copyright © Big Ideas Learning, LLC 30 Resources by Chapter All rights reserved.
- 2. Name____________________________________________________________Date___________ 1.5 Practice B Use a formula to find the area of the figure. 1. 2. 3. 4. 5. 6. Write a formula for the area of the shaded region in terms of x. 7. 8. 9. 10. The formula M = 220 - a gives a person’s maximum heart rate M, where a is the person’s age in years. What is the maximum heart rate of a person who is 12 years old? 11. Find three possible sets of dimensions for a parallelogram whose area is 120 square feet. Big Ideas Math Green Copyright © Big Ideas Learning, LLC Resources by Chapter All rights reserved. 31