An airplane flying into a headwind travels 690 miles in 3 hours and 50 minutes. On the return flight, the distance is traveled in 3 hours. Find the airspeed of the plane and the speed of the wind, assuming that both remain constant.
A) plane speed = 220 mph; wind speed = 25 mph
B) plane speed = 182 mph; wind speed = 194 mph
C) plane speed = 205 mph; wind speed = 25 mph
D) plane speed = 220 mph; wind speed = 212 mph
E) plane speed = 182 mph; wind speed = 25 mph
C) plane speed = 205 mph; wind speed = 25 mph
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Evaluate.log5 519
A. 5 B. 18 C. 19 D. 20
Solve the problem.How many liters of a 10% alcohol solution must be mixed with 30 liters of a 50% solution to get a 30% solution?
A. 6 L B. 3 L C. 30 L D. 60 L
Decide whether the statement is true or false. If it is false, tell why.If k = 0, then x2 = k will have exactly one real solution.
A. True B. False; the equation will have two real solutions. C. False; the equation will have no real solution.
Use the multiplication property of inequality to solve the inequality and graph the solution set on a number line.
> 7
A. (-?, 49]
B. (49, ?)
C. (-?, 49)
D. [49, ?)