Combine like terms.-5(7y + 6) - (7y + 3) - 4y + 9
A. -46y + 36
B. -32y - 18
C. 46y + 9
D. -46y - 24
Answer: D
Mathematics
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Factor completely.20z4 + 3z2 - 9
A. (4z4 + 3)(5z - 3) B. (4z2 + 3)(5z2 - 3) C. (5z2 + 3)(4z2 - 3) D. (5z4 + 3)(4z - 3)
Mathematics
Find zw or 
as specified. Leave your answer in polar form.z = 10(cos 30° + i sin 30°)w = 5(cos 10° + i sin 10°)Find zw.
A. 15(cos 300° + i sin 300°) B. 50(cos 40° + i sin 40°) C. 15(cos 40° + i sin 40°) D. 50(cos 300° + i sin 300°)
Mathematics
Add or subtract. Simplify by combining like radical terms, if possible. Assume all variables and radicands represent nonnegative numbers.2
+ 7
A. -16
B. 9
C. 16
D. 12
Mathematics
Factor by grouping.45 - 5y - 9t + yt
A. (9 - y)(5 - t) B. (9 + y)(5 + t) C. (9 + y)(5 - t) D. (9 - y)(5 + t)
Mathematics