Perform the indicated operation. Simplify if possible.
- 
A. 8a
B. 16b
C. 4b
D. 0
Answer: C
Mathematics
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Simplify. Assume that all variables represent positive numbers.
A. x + 7y B. (x - 7y)2 C. (x + 7y)2 D. x - 7y
Mathematics
Solve the problem.A boat can go 90 mph in still water. It takes as long to go 630 miles upstream as it does to go downstream 720 miles. How fast is the current?
A. 9 mph B. 6 mph C. 1 mph D. 5 mph
Mathematics
Simplify the numerical expression.
A. -3.92 B. -2.92 C. -0.92 D. -5.92 E. 0.08
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 
.
A. 5(cos 3° + i sin 3°) B. 5(cos 20° + i sin 20°) C. 2(cos 20° + i sin 20°) D. 2(cos 3° + i sin 3°)
Mathematics