Math Practice 101
Homework Explained - Math Practice 101

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Grade 8 HMH Go Math - Answer Keys
Chapter 7: Solving Linear Equations; Mixed Review


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Selected Response

  • Question 1 (request help)

    Two cars are traveling in the same direction. The first car is going 40 mi/h, and the second car is going 55 mi/h. The first car left 3 hours before the second car. Which equation could you solve to find how many hours it will take for the second car to catch up to the first car?
    • \(55\text{t} + 3 = 40\text{t}\)
    • \(55\text{t} + 165 = 40\text{t}\)
    • \(40\text{t} + 3 = 55\text{t}\)
    • \(40\text{t} + 120= 55\text{t}\)
  • Question 2 (request help)

    Which linear equation is represented by the table?
    • \(\text{y} = -\text{x} + 5\)
    • \(\text{y} = 2\text{x} - 1\)
    • \(\text{y} = \text{x} + 3\)
    • \(\text{y} = -3\text{x} + 11\)
  • Question 3 (request help)

    Shawn’s Rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darla’s Surf Shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit. For what total number of hours are the charges for Shawn’s Rentals the same as the charges for Darla’s Surf Shop?
    • 3
    • 4
    • 5
    • 6
  • Question 4 (request help)

    Which of the following is irrational?
    • -8
    • 4.63
    • \(\sqrt{11}\)
    • \(\cfrac{1}{3} \)
  • Question 5 (request help)

    Greg and Jane left a 15% tip after dinner. The amount of the tip was $9. Greg’s dinner cost $24. Which equation can you use to find x, the cost of Jane’s dinner?
    • \(0.15\text{x} + 24 = 9\)
    • \(0.15(\text{x} + 24) = 9\)
    • \(15(\text{x} + 24) = 9\)
    • \(0.15(\text{x} = 24 + 9\)
  • Question 6 (request help)

    For the equation \(3(2\text{x} - 5) = 6\text{x + k}\), which value of k will create an equation with infinitely many solutions?
    • 15
    • -5
    • 5
    • -15
  • Question 7 (request help)

    Which of the following is equivalent to \(2^{-4 }\)?
    • \(\cfrac{1}{16}\)
    • \(\cfrac{1}{8}\)
    • -2
    • -16

Mini-Task

  • Question 8 (request help)

    Use the figures below for parts a and b.

    a. Both figures have the same perimeter. Solve for x.
  •    

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