I need help understanding these  Tom is older than mike. the sum of their age is 75 and the difference of their age is 35, how old is tom Answer: X(x+5)=84 How do i get this x^2+5x-84=0 (x-7)(x+12)=0 tom...

A truck traveled the first 110 miles of a trip at one speed and the last 150 miles at an average speed of 5 miles per hour less. The entire trip took 5 hours. What was the average speed for the first...

A kayaker can paddle 12 mi in 2 h moving with the river current. paddling at the same pace, the trip back against the current takes 4h. Assume the river current is constant. Find what the kayaker's...

Apples cost \$5 each and Oranges cost \$3 each. When the bag is full of apples and oranges, it costs \$85. What is the number of oranges in the bag? I need to see how it is done step by step because...

Sam knows that he walks at a constant rate of 7 feet per second. While at the airport, he wishes to determine the speed of the moving sidewalk by first walking in the same direction as the walkway...

In a thunderstorm, the formula M = t/5.6 gives the approximate distance, M, in miles in a lightning strike if it takes t seconds to hear the thunder after seeing lightning. If you are 10 miles away...

Mary buys 2 plain ice creams and 3 icecreams(1flake) for €10.20... Joe Buys 3 plain ice creams and 4 icecreams(1flake on each again) costing €14.20. Calculate the cost of one flake

A caterer must make at least 50 gal of potato soup and at least 120 gal of tomato soup. One chef can make 5 gal of potato soup and 6 gal of tomato soup in 1h. Another chef can make 4 gal of potato...