Math Practice 101
Homework Explained - Math Practice 101

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Grade 7 McGraw Hill Glencoe - Answer Keys


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  • Question 8 (request help)

    At a 33-foot depth underwater, the pressure is 29.55 pounds per square inch (psi). At a depth of 66 feet, the pressure reaches 44.4 psi. At what rate is the pressure increasing?

Reason Abstractly If y varies directly with x, write an equation for the direct variation. Then find each value.

  • Question 9 (request help)

    If y = 14 when x = 8, find y when x = 12.
  • \(\large y = \)   
  • Question 10 (request help)

    Find y when x = 15 if y = 6 when x = 30.
  • \(\large y = \)   
  • Question 11 (request help)

    If y = -6 when x = -24, what is the value of x when y = -7?
  • \(\large x = \)   
  • Question 12 (request help)

    Find x when y = 14, if y = 7 when x = 8.
  • \(\large x = \)   

H.O.T. Problems Higher Order Thinking

  • Question 13 (request help)

    Reason Inductively Identify two additional values for x and y in a direct variation relationship where y = 11 when x = 18.
  • Type below:
  • Question 14 (request help)

    Persevere with Problems Find y when x = 14 if y varies directly with x2 , and y = 72 when x = 6.
  • \(\large y = \)   

Standardized Test Practice

  • Question 15 (request help)

    Model with Mathematics Tom is drawing rectangles in which the length varies directly with the width. One of his rectangles has a width of 2 centimeters and a length of 3.6 centimeters. Draw and label a rectangle with a length of 35 centimeters that could be one of Tom's rectangles. Then find the perimeter.
  • \(\large \text{the perimeter = } \)   \(\large\text{ cm}\)

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