Solve the problem.Over a specified distance, speed varies inversely with time. If Joe can drive from his house to his office in 40 minutes at an average speed of 40 miles per hour, what average speed is needed to drive the same distance in half an hour? If necessary, round your answer to the nearest tenth.
A. 60 miles per hour
B. 30 miles per hour
C. 53.3 miles per hour
D. 50 miles per hour
Answer: C
Mathematics
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Multiply the rational expressions. 
? 
A. -5x + 5
B. 
C. 5x - 5
D. - 
Mathematics
Add or subtract by first simplifying each radical and then combining any like radical terms. Assume that all variables represent positive real numbers.
+ 10
- 4
A. 36
B. 32
C. 32
- 4
D. -72
Mathematics
Sketch several solution curves.y' = y4 - y3
What will be an ideal response?
Mathematics
Factor and simplify the expression.sec4x + sec2x tan2x - 2 tan4x
A. tan2x - 1 B. 3 sec2x - 2 C. sec2x + 2 D. 4 sec2x
Mathematics