Express the product as a sum containing only sines or cosines.2 cos(7?) cos ?
A. cos(14?) + cos(2?)
B. cos(8?) + sin(6?)
C. cos(8?) + cos(6?)
D. cos(10?) + sin(4?)
Answer: C
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Solve the problem.Suppose y = mx + b is a mathematical model for actual time as a function of estimated time, where y represents actual time and x represents estimated time and m and b are constants. If m = 2.2 and b = -3.9, find y when x is 30 min.
A. 21.42 min B. 69.9 min C. 62.1 min D. 38.58 min
Graph the following equation using the square settings given.f(x) = x2 + 3x - 8 [-16, 16] by [-10, 10]
A. 
B. 
C. 
D. 
Use the given graph to find the values of t that produce the graph in the given quadrant.x = 4 - 
, y = t + 3, -6 ? t ? 6
Quadrant III
A. 4 ? t ? 6 B. -6 ? t ? -4 C. -3 ? t ? -4 D. -4 ? t ? 4
Find the perimeter.A concrete curb is to be built around a parking lot. How many meters of curbing will be needed?
A. 243 m B. 290 m C. 145 m D. 4606 m