Solve the problem.A painter leans a 20 foot ladder against one wall of a house. At what height does the ladder touch the wall if the foot of the ladder is 13 ft from the base of the wall?
A. ? 15.2 ft
B. ? 2.6 ft
C. ? 115.5 ft
D. ? 23.9 ft
Answer: A
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Write a cost function for the problem. Assume that the relationship is linear.A cab company charges a base rate of $2.00 plus 20 cents per minute. Let C(x) be the cost in dollars of using the cab for x minutes.
A. C(x) = 2.00x + 0.20 B. C(x) = 0.20x + 2.00 C. C(x) = 0.20x - 2.00 D. C(x) = 2.00x - 0.20
Solve.Find the value of L if P = 22 and W = 6 in the formula P = 2L + 2W.
A. 16 B. 8 C. 5 D. 11
One section of a suspension bridge hangs between two towers that are 40 feet above the surface and 300 feet apart.
A cable strung between the tops of the two towers is in the shape of a parabola with its vertex 20 feet above the surface. With axes drawn as indicated in the figure, find the equation of the parabola.
A. x2 - 563y + 45,000 = 0 B. x2 - 1,125y + 22,500 = 0 C. x2 - 695y + 55,600 = 0 D. x2 - 1,390y + 27,800 = 0 E. x2 - 1,100y + 22,000 = 0
Provide an appropriate response.Write the equation of a line that passes through (3, 9) and (0, -7). Write the final answer in the form 
where A, B, and C are integers with no common divisors (other than ±1) and 
A. 3x - 16y = 21 B. 16x - 3y = -21 C. 16x - 3y = 21 D. -16x + 3y = 21