Use sum-to-product formulas to rewrite the expression as a product.cos 7? - cos 3?
A. -2 cos 5x sin 2x
B. 2 cos 2x
C. -2 sin 5x sin 2x
D. 2 cos 5x cos 2x
Answer: C
Mathematics
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Find the average value of the function f over the given region.f(x, y) = 9x + 10y over the region bounded by the coordinate axes and the lines 
and 
.
A. 
B. 
C. 
D. 
Mathematics
Evaluate the given binomial coefficient.
A. 17 B. 210 C. 1 D. 35
Mathematics
Choose the graph that matches the equation. -3x + 12y = 18
A. 
B. 
C. 
D. 
Mathematics
Use dot mode to graph the function f in the standard viewing rectangle. Evaluate f for the given x-values.f(x) = [[-x]] at x = -3.3 and x = 2.6
A. 
f(-3.3) = -4, f(2.6) = 2
B. 
f(-3.3) = 2, f(2.6) = -1
C. 
f(-3.3) = 3, f(2.6) = -3
D. 
f(-3.3) = 1, f(2.6) = -3
Mathematics