(b) 11xyþ 10
(c) 2x3yþ 5
(d) 3x5yþ 10- Combine like terms: 5(x3)þ7x8.
(a) 2x 5
(b) 12x 23
(c) 12x 11
(d) 3xþ 5 - Find the wing loading (L) in pounds per square foot of an airplane
when the gross weight (W) is 5120 pounds and the wing area (A) is 320
square feet. Use L¼WA.
(a) 27 pounds per square foot
(b) 20 pounds per square foot
(c) 16 pounds per square foot
(d) 5 pounds per square foot - Find the distance (d) in feet an object falls when g¼32 and t¼ 3
seconds. Use d¼^12 gt^2.
(a) 96 feet
(b) 144 feet
(c) 48 feet
(d) 288 feet - Solve xþ 52 ¼38.
(a) 14
(b) 90
(c) 1976
(d) 14 - Solve 5x¼85.
(a) 15
(b) 90
(c) 17
(d) 80 - Solve x 16 ¼84.
(a) 68
(b) 68
(c) 100
(d) 100
150 CHAPTER 7 Expression and Equations