A bank teller has 54 $5 and $20 bills in her cash drawer. The value of thebills is $780. How many $5 bills are there?

Four times the sum of twice a number and three is twelve

If Jim Roller can paint a room in 3 hours while John Brush would take 5 hours, how long will they take if they work[..]

a culture of 3000 bacteria quadruples in size every 10 minutes. If P(t) represents the population of the bacteria[..]

The length of a rectangle is twice the width; the perimeter is 42 inches. find the width

A group of college students is volunteering for Homes for the Community during their spring break. They are putting[..]

Merlin industries bought a laptop for $2,100. It is expected to depreciate at a rate of 14% per year. What will the[..]

Suppose that the wealth of a business owner is increasing exponentially. In 1993, he had a $40 million. In 2001, he[..]

A motorboat goes 36 miles upstream on a river whose current is running at 3 miles per hour. The trip up and back[..]

Carl can do a particular job in 4 hours. It takes mike 6.5 hours to the same job. Write an equation that will show[..]