Write the sentence as an equation. Let the variable x represent the number.The sum of twice a number and 5 is 9.
A. 2x - 5 = 9
B. 10x = 9
C. 2x + 5 = 9
D. x + 10 = 9
Answer: C
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Estimate the slope of the curve at the indicated point.
A. Undefined B. -1 C. 1 D. 0
Use a calculator to find the value of the expression rounded to two decimal places.sin-1 (-0.9)
A. -64.16 B. 2.69 C. 154.16 D. -1.12
Solve.The area of a rectangular wall in a classroom is 171 square feet. Its length is 8 feet shorter than three times its width. Find the length and width of the wall of the classroom.
A. width = 9 ft; length = 35 ft B. width = 9 ft; length = 17 ft C. width = 9 ft; length = 33 ft D. width = 9 ft; length = 19 ft
Solve the problem.The height h of a ball thrown is given by 
, where x is the horizontal distance traveled and both measurements are in feet. At what horizontal distances will the height of the ball be more than 
(Round distances to the nearest tenth of a foot, if necessary.)
A. 0 ft < x < 5.9 ft or 19.1 ft < x < 25 ft B. 5.9 ft < x < 25 ft C. 0 ft < x < 19.1 ft D. 5.9 ft < x < 19.1 ft