Working together, two people can cut a large lawn in 4 hr. One person can do the job alone in 1 hr. less than the[..]

A boat goes 16 mph in still water, and the rate of the current is t mph. What is the rate of the boat when it[..]

A boat travels 1km upstream and 1km back. The time for the round trip is 8hrs. The speed of the stream is 4 km/hr.[..]

A right triangle has legs with lengths x units and 7 units. The hypotenuse has length x+1 units. Find the perimeter[..]

A quanity of y is initially -77 and decreases at a rate of 21 per day. Find an equation y=mx+b that models the[..]

In 2006 there were 844 children adopted in country A from country B, and this number was increased by 245 children[..]

A collection of nickels , dimes and quarters consists of 15 coins with a value of $1.10. If the number of nickels[..]

67 is 112% of what number

Lilet can do a certain job in 8 hours and her daughter krizia can do it in 10 hours. After the two nave been working[..]

Kristine has $26.40. If there are thrice as many $0.25 coin as $0.05 coin and twice as many $1.00 coin as $0.25 coin[..]