Page 590 - Basic College Mathematics with Early Integers

S E C T I O N 8.1 I VARIABLE EXPRESSIONS 567

Objective Find the perimeter of each figure. See Example 17.

71. 2y meters 6 meters 72. 3x feet x feet 73. 2a feet 2a feet 2a feet
7 feet
4y meters
5x
5y meters
3y feet 4x feet 6 feet 6 feet
meters
16 meters 12 feet 5a feet

74. 3z meters 75. 76.
Each side: Each side:
(5x 11) (9y 1)
1 meter 1 meter
inches kilometers
5z meters

Find the area of each rectangle. See Example 18.

77. 9 inches 78. 5x centimeters 79.

32
8 centimeters
kilometers
4y inches
(x 2) kilometers

80. 81. (3y 1) miles 82. 12 feet

(z 6) (2x 3)
meters feet
20 miles
11 meters

Objectives Mixed Practice Solve. See Examples 1 through 18.

83. Find the area of a regulation NCAA basketball court 84. Find the area of a rectangular movie screen that is
that is 94 feet long and 50 feet wide. 50 feet long and 40 feet high.

85. A decorator wishes to put a wallpaper border 86. How much fencing will a rancher need for a
around a rectangular room that measures 14 feet by rectangular cattle lot that measures 80 feet by
18 feet. Find the room’s perimeter. 120 feet?

87. Find the perimeter of a triangular garden that 88. Find the perimeter of a triangular picture frame that
measures 5 feet by x feet by (2x + 1) feet. measures x inches by x inches by (x - 14) inches.