Solve the problem.Two airplanes leave the same airport at the same time. The airplane flying east travels at an average speed that is 40 mph faster than the airplane flying north. If the two airplanes are 750 mi apart after 1 hr, find the average speed of each airplane to the nearest mile per hour.
A. North: 510 mph
East: 470 mph
B. North: 550 mph
East: 590 mph
C. North: 550 mph
East: 510 mph
D. North: 510 mph
East: 550 mph
Answer: D
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Use a power regression model for the following data to answer the following question. If x is multiplied by 3, what is the effect on y? Round your answer to two decimal places. x 2.96 4.2 5.71 8.06 8.35 y 6.25 5.04 4.38 1.06 3.97?
A. y is multiplied by 0.30. B. y is multiplied by 0.31. C. y is multiplied by 0.37. D. y is multiplied by 0.45.
Express the following logarithm as specified.ln 7
in terms of ln 5 and ln 7
A. 
B. ln 7 + 
C. ln 5 + 
D. 
ln 7
Find the product and simplify. Assume all variables represent nonnegative real numbers.
? 
A. 60
B. 30
C. 72
D. 30
Decide whether or not the ordered pair is a solution to the equation.2x - 5y = 23; (4, 3)
A. Yes B. No