Write the expression with positive exponents, and simplify if possible.
A. 7
B. 49
C. 14
D. 343
Answer: B
Mathematics
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Provide an appropriate response.Find the greatest common factor of 20 and 28.
A. 2 B. 4 C. 1 D. 140
Mathematics
Use rational equations to solve the problems.A plane flies 430 miles with the wind and 310 miles against the wind in the same length of time. If the speed of the wind is 30 mph, what is the speed of the plane in still air?
A. 175 mph B. 210 mph C. 190 mph D. 185 mph
Mathematics
Find the mean for the sequence of numbers.6, 8, 10, 12, 14, 16, 18
A. 14 B. 26 C. 12 D. 13
Mathematics
Find the probability of the event.A battery company has found that the defective rate of its batteries is .03. Each day, 22 batteries are randomly tested. On Tuesday, 1 is found to be defective.
A. .348 B. .614 C. .110 D. .118
Mathematics