Solve the system of equations using the substitution method.
A. (9, 15)
B. 
C. (3, 5)
D. (-9, -15)
Answer: D
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The figure shows a walkway with a handrail. Angle ? is the angle between the walkway and the horizontal, while angle ? is the angle between the vertical posts of the handrail and the walkway. Assume that the vertical posts are perpendicular to the horizontal.
?
?
Find ? if ? = 52°.
?
A. ? = 57° B. ? = 123° C. ? = 38° D. ? = 128° E. ? = 52°
Perform the indicated operations.(3x - 4y)2
A. 3x2 - 24xy + 16y2 B. 9x2 - 24xy + 16y2 C. 9x2 + 16y2 D. 3x2 + 16y2
Determine a formula for the exponential function.
A. f(x) = -25.8 ? 1.6x B. f(x) = -15.48 ? 0.6x C. f(x) = 15.48 ? 1.4x D. f(x) = - 43 ? 0.6x
Solve the problem.A rectangular sign is being designed so that the length of its base, in feet, is 14 feet less than 4 times the height, h. Express the area of the sign as a function of h.
A. A(h) = -14h + h2 B. A(h) = -14h2 + 2h C. A(h) = 14h - 2h2 D. A(h) = -14h + 4h2