Write a system of equations for the problem, and then solve the system.Two trains start from towns 129miles apart and travel toward each other on parallel tracks. They pass each other 1.5 hours later. If one train travels 4 mph faster than the other, find the speed of each train.
A. 47 mph; 39 mph
B. 45 mph; 41mph
C. 35 mph; 51 mph
D. 40 mph; 46 mph
Answer: B
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Determine whether the statement is true or false.If a triangle is a parallelogram, then all rectangles are squares.
A. True B. False
Solve the problem.The function f(x) = |x|- 5 is not one-to-one.(a) Find a suitable restriction on the domain of f so that the new function that results is one-to-one.(b) Find the inverse of f.
What will be an ideal response?
Solve the problem.The value of cash for Hamilton Supplies last year was $40,000 and this year was $60,000. Find the percent increase (or decrease) in cash from last year to this year.
A. 50.0% increase B. 66.7% decrease C. 66.7% increase D. 50.0% decrease
Solve.Carole's car averages 15.9 mi/gal in city driving and 24.8 mi/gal in highway driving. If she drove a total of 531.0 mi on 25 gal of gas, how many of the gallons were used for city driving?
A. 10 gal B. 20 gal C. 12 gal D. 15 gal