Solve the application problem.Jim can run 5 miles per hour on level ground on a still day. One windy day, he runs 13 miles with the wind, and in the same amount of time runs 6 miles against the wind. What is the rate of the wind? (Round your answer to the nearest tenth, if necessary.)
A. 3.5 mph
B. 13.6 mph
C. 5 mph
D. 1.8 mph
Answer: D
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Use Gauss-Jordan elimination to find the solution. Write the solution as an ordered pair. x + 7y = -23x + y = 34
A. (-2, 3) B. (12, -2) C. (7, 12) D. (3, 7)
Write out the first five terms of the sequence.an = 2(3n - 1)
A. 4, 8, 12, 16, 20 B. -2, 4, 10, 16, 22 C. 4, 10, 16, 22, 28 D. 2, 5, 8, 11, 14
Solve the problem.A chemist needs 140 milliliters of a 62% solution but has only 56% and 84% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
A. 20 mL of 56%; 120 mL of 84% B. 30 mL of 56%; 110 mL of 84% C. 110 mL of 56%; 30 mL of 84% D. 120 mL of 56%; 20 mL of 84%
Fill in the blank with one of the words or phrases listed below. Not all choices will be used.
The 
of 25 is 5.
A. principal square root B. conjugate C. index D. radicand