Combining like terms

-7r-9+8+5r

show how you got the answer

You bought your car for $12500 and it is depreciating at 13% per year. How long until it is only worth half of what you paid for it? What is your answer to the nearest year?

Which of the following is a common denominator of 1/4 and 5/6? Answers: A: 8 B: 9 C: 12 D: 15

solve this equation a{6a-2a}=b{2a-3b}

There are 250 bricks used that to build wall that is 20 ft hifh? how many bricks will be used to build a wall that is 30 feet?

A population of ants is growing at a rate of 8% a year. If there are 160 ants in the initial population, find the number of ants after 6 years

Liz has hiking a trail that is 0.8 miles long she traveled 2 tenths by herself the rest she travels with her friends how far does liz hike on her own

Rich has t dollars in his checking account. On June 3, he deposited w, h, and v dollars and cashed a check that he wrote himself for K dollars. Write an algebraic expression that represents the amount of money in his account after the transactions

What does e^-infinity and e^infinity equal to? Explain your answer

What is the product? 3k/k+1*k^2-1/3k^3

Pencils come in packages of 8. Erasers come in packages of 7. Philip wants to purchase the smallest number of pencils and erasers so that he will have exactly 1 eraser per pencil. How many packages of pencils and erasers should Philip buy? A.