7th Grade Math

Test PracticeT

Lesson 2B Multiplication and Division Equations 219

33. A football player can run 20 yards in
    3.4 seconds. Which equation could be
    used to find y, the number of yards the
    football player can run in a second?
    A. 20 y = 3.4
    B. 3.4 - y = 20
    C. 3.4y = 20
    D. 20 + y = 3.4


34. SHORT RESPONSE Use the formula
    A = bh to find the base in inches of a
    rhombus with a height of 7 inches and
    an area of 56 square inches.

h

b

35. EXTENDED RESPONSE The table
    shows the prices of different online
    DVD rental plans. Mrs. Freedman
    prepaid for x number of months of the
    unlimited plan.

DVD Rental Plans

Plan Cost per

Month ($)

Unlimited 16.50

3 DVDs at a time 14.35

2 DVDs at a time 11.99

Part A Mrs. Freedman paid $99 for x

number of months of the unlimited plan.

Write an equation to fi nd the number of

prepaid months.

Part B Solve your equation. Explain

how you solved.

C 26. OPEN ENDED Describe a real-world situation in which you would use

a division equation to solve a problem. Write your equation and then

solve your problem.

27. FIND THE ERROR Raul is solving - 6 x = 72.
    Find his mistake and correct it.
    
    
    • 6 x = 72
      –6 6 x = ^726
      x = 12
    
    
    
    


28. CHALLENGE Solve 3|x| = 12. Explain your reasoning.


29. REASONING True or false. To solve the equation 5x = 20 you can use the
    Multiplication Property of Equality. Explain your reasoning.

E WRITE MATH Write a real-world problem that could be represented by

each equation.

30. 2 x = 16 31. 3 x = 75 32. 4 x = - 8

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