Simplify.(-6x4y)2 - (5x7y)(3xy)
A. 21x4y2
B. 21x8y4
C. 21x8y2
D. 21x2y2
Answer: C
Mathematics
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Determine the phase shift of the function.y = 5 cos 
A. 
units to the right
B. ? units to the left
C. 5? units to the right
D. 
units to the left
Mathematics
Factor the perfect square trinomial.x2 + 20x + 100
A. x2 + 20x + 100 B. (x + 10)2 C. (x - 10)2 D. (x + 10)(x - 10)
Mathematics
Use the laws of exponents to simplify. Do not use negative exponents in the answer. Assume that even roots are of nonnegative quantities and that all denominators are nonzero.z-2/7 ? z3/7
A. z1/7 B. z7/6 C. z-1/7 D. z6/7
Mathematics
Answer the question.What values of n will make xn a perfect square?
A. n must be a power of 3. B. n must be even. C. n must be a multiple of 5. D. n must be odd.
Mathematics