Express the product as a sum or difference.cos 
cos 
A. 
(cos 4x - sin 3x)
B. 
(cos 8x - sin6x)
C. 
(cos 3x + cos 4x)
D. 
cos2 7x
Answer: C
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Solve the problem.If f(x) = -6x + 3 and g(x) = 3x2 + 8x - 5, find g(f(-8)).
A. 561 B. 8206 C. 556 D. -735
Choose the equation that matches the graph.
A. y2 = -8x B. y2 = 8x C. -8y2 = x D. x2 = -8y
Solve the problem.Corn, soybean, and wheat production this week decreased by 4.5% from last week. If the decrease amounted to 13,080 tons, what was the production last week? Round to the nearest tenth, if necessary.
A. 588.6 tons B. 58,860 tons C. 290,666.7 tons D. 29,066.7 tons
Graph the quadratic equation using its properties. Identify the vertex, intercepts, and axis of symmetry.y = x2 - 2x - 8
A. vertex: (1, - 9); x-intercepts: 2, 4;
y-intercept: -8; axis of symmetry: x = 1
B. vertex: (- 1, 9); x-intercepts: -4, 2;
y-intercept: 8; axis of symmetry: x = - 1
C. vertex: (- 1, - 9); x-intercepts: -4, 2;
y-intercept: -8; axis of symmetry: x = - 1
D. vertex: (1, - 9); x-intercepts: -2, 4;
y-intercept: -8; axis of symmetry: x = 1