Solve the problem.A plane flies 500 miles with the wind and 300 miles against the wind in the same length of time. If the speed of the wind is 20 mph, what is the speed of the plane in still air?
A. 85 mph
B. 105 mph
C. 80 mph
D. 70 mph
Answer: C
Mathematics
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(-9 + x)(5x + 8)
A. x2 - 37x - 37 B. 5x2 - 38x - 72 C. 5x2 - 37x - 72 D. 5x2 - 72x - 37
Mathematics
Solve the problem by using addition, subtraction, multiplication, or division as needed.A spreadsheet contains 693 entries in a rectangular array which has 33 rows. How many entries are in each row?
A. 21 entries per row B. 22,869 entries per row C. 31 entries per row D. 660 entries per row
Mathematics
Perform the indicated operations.26 + 16 ? 24 - 28
A. 980 B. -168 C. 382 D. 38
Mathematics
Determine which graph is nonplanar and indicate whether it contains a Utilities Graph or as a subgraph.
Mathematics