The age of a father now is four times that of his son. In ten years time, the father will be three times as old as[..]

A carpenter has a board that is 6 and 3/4 feet long. She cuts the board into 3 equal pieces. What is the length in[..]

A lens has a focal length of 6 centimeters. How far is an object from a lens when its image is three times far away?

One number is 1 less than a second number. Twice the second number is 20 less than 4 times the first. Find the two[..]

the pairs (-2,-3)(-1,2),and (4.-3)can serve as three(of four)vertices for thee different parallelograms .find the[..]

An athlete can burn 9 calories per minute on a stationary Bicycle and 11.5 calories per minute on a stair climber.[..]

Susan invested part of her $40,000 bonus in a fund that paid a 12% profit and invested the rest in stock that[..]

find average cost of C(x)=5.5x + 9300 when 200 items are produced, 2000 items & 5000 items.

A box contains the eleven letters PROBABILITY. Four letters are drawn one by one with replacement and recorded in[..]

Two dice are rolled. Find the probabilty that the score on the dice is 9.