Write the expression as the cosine of an angle, knowing that the expression is the right side of the formula for 
with particular values for ? and ?.cos (155°) cos (35°) + sin (155°) sin (35°)
A. cos (120°)
B. cos (220°)
C. cos (210°)
D. cos (190°)
Answer: A
Mathematics
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Evaluate the integral.
A. -9
B. -18
C. 9
D. 0
Mathematics
Solve the problem.A trough is to be made with an end of the dimensions shown. The length of the trough is to be 
long. Only the angle ? can be varied. What value of ? will maximize the trough's volume?
A. 32° B. 30° C. 50° D. 10°
Mathematics
Graph the linear function using the slope and y-intercept.y = 
x + 2
A. 
B. 
C. 
D. 
Mathematics
Solve and check your answer.x - 10 = 0
A. 11 B. 0 C. 9 D. 10
Mathematics