Solve the direct variation.If n varies directly as the square of m and n = 144 when m = 4, what is the value of n when m = -6?
A. 324
B. -324
C. 216
D. -216
Answer: A
Mathematics
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Verify that each equation is an identity.(1 - cos x)(1 + cos x) = sin2x
What will be an ideal response?
Mathematics
Write an equation of the line.
A. x = -9 B. y = -9x C. y = -9 D. y = x - 9
Mathematics
Find the indicated intercept(s) of the graph of the function.y-intercept of f(x) = 
A. (0, 13) B. (0, -4) C. (0, -1) D. none
Mathematics
Divide, if possible.-189 ÷ 9
A. 21
B. - 
C. -21
D. -31
Mathematics