Find the phase shift of the function.y = 2 cos 
A. 2 units down
B. 
units to the right
C. 2 units up
D. 
units to the left
Answer: D
Mathematics
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Simplify.5 ? 4 - 3 ? 6
A. 30 B. 102 C. 2 D. 360
Mathematics
Find the domain of the function.f(x) = x2 + 7
A. {x|x ? -7}, or [-7, ?) B. {x|x ? -7}, or (-?, -7) ? (-7, ?) C. {x|x > -7}, or (-7, ?) D. all real numbers, or (-?, ?)
Mathematics
Factor completely. If the polynomial is prime, then state this as your answer.9x2 + 6xy - 8y2
A. (9x + 4y)(x - 2y) B. (3x + 4y)(3x - 2y) C. (3x - 4y)(3x + 2y) D. prime
Mathematics
Find the general term of the arithmetic sequence.-1, -3, -5, -7, -9, . . .
A. an = 2n - 1 B. an = 1 - 2n C. an = -1 - 2n D. an = -3 - 2n
Mathematics