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Home > CC3 > Chapter 7 > Lesson 7.1.2 > Problem 7-20

7-20.
  1. a. 6xy = 4
    3x + y = 5

    1. (0, –4)

    b. x = y + 4
    2x + 3y = −12

    2. (3, 7)

    c. 5x − 2y = 1
    y = 2x + 1

    3. (1, 2)

  2. 12

    5

    6

    4

    Use the rectangle at right to answer the following questions. Homework Help ✎

    1. Find the area of the entire rectangle. Explain how you found your solution.

    2. Calculate the perimeter of the figure.

The area of a figure is the same as the sum of the area of its parts.

72 + 30 + 48 + 20

The perimeter of a figure is the sum of its sides.

54 units