Solve the problem.A boat can go 105 mph in still water. It takes as long to go 560 miles upstream as it does to go downstream 640 miles. How fast is the current?
A. 1 mph
B. 7 mph
C. 8 mph
D. 6 mph
Answer: B
Mathematics
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Factor, if possible.x2 + 3xy - 10y2
A. (x - 5y)(x + 2y) B. (x + 5y)(x - 2y) C. (x - 5y)(x + y) D. (x - y)(x + 2y)
Mathematics
Solve the problem.Corn, soybean, and wheat production this week decreased by 8.5% from last week. If the decrease amounted to 6,360 tons, what was the production last week? Round to the nearest tenth, if necessary.
A. 540.6 tons B. 54,060 tons C. 74,823.5 tons D. 7,482.4 tons
Mathematics
Solve the problem.John does 12 pushups on the first day of a 30-day month, and then increases the number of pushups by 2 pushups a day. How many pushups has he done by the end of the month?
A. 1290 B. 1260 C. 1230 D. 1218
Mathematics
Simplify.240 ÷ 8 - 2
A. 40 B. 28 C. 234 D. 230
Mathematics