Solve the problem.Two sailboats leave a harbor in the Bahamas at the same time. The first sails at 21 mph in a direction 350°. The second sails at 28 mph in a direction 210°. Assuming that both boats maintain speed and heading, after 4 hours, how far apart are the boats?
A. 125.1 mi
B. 143.7 mi
C. 139 mi
D. 184.4 mi
Answer: D
Mathematics
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Multiply the expressions.(9x + 7)(9x - 7)
A. 81x2 + 126x - 49 B. 81x2 - 49 C. x2 - 49 D. 81x2 - 126x - 49
Mathematics
Use the Remainder Theorem to find the remainder.f(x) = 4x2 - 7x - 5 is divided by x - 
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Graph the equation as a solid line. Graph the inverse relation as a dashed line on the same axes by reflecting across the line y = x.y = x2 - 5
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Perform the indicated operation and write the answer in lowest terms.
+ 
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Mathematics