20 + 7k - 12 - 5k + 8k

travis is 21 years older than his sister michelle. in 9 years he will be twice as old as michelle how old is each of them now

Nelson decides to invest $1,000,000 in a period annuity that earns 4.8% APR compounded monthly for a period of 15 years. How many years will it take Nelson to earn back his initial investment?

The population of a town was 47,000 in 1950 and 83,000 in 2010. Assume the rate of population increase is constant. What will the population be in 2015? A) 86,000 B) 89,000 C) 85,400 D) 83,600

Sammy went on a class trip to the art museum and sketched a scale drawing of a famous mural. The original painting was 72 inches wide and 108 inches long. Sammy used a scale factor of 1/12 to make his drawing. What is the length of Sammy's drawing?

Write [2 (cos15*+isin15*) ]^3 in standard form a+bi

A copy Machine can make 360 copies in 10 minutes. How many copies can it make in 100 minutes?

Each student needs 35 craft sricks for an art project. The art teacher has 7,140 craft sticks. How many students can get craft stick from teacher? What number can i use to estimate the quotient? Explain how to check the answer to a division problem.

Does anyone know f (-3) =

In a fruit punch you mix 150 ml of lemonade with 250 ml of fruit Write the ratio of the volume of lemonade to the volume of fruits Give your ratio in its simplest form.

The sun of 3 times a number and 5 is 2 times the number plus 15. what is half the number