What is the solution to the following system?

3x+2y+z=20

x-4y-z=-10

2x+y+2z=15

A. (2, 3, 4)

B. (4, 3, - 2)

C. (4, 3, 2)

D. (6, 7, - 2)

Candy is at the balloon shop and sees that 10 balloons cost $0.15. He needs 50 balloons to decorate his room. How much will 50 balloons cost? What steps do I use to get the answer?

A small fruit smoothie is 18 ounces while a large fruit smoothie is 21.96 ounces. The large fruit smoothie is what % larger

What part of 35 is 7?

A man weighs 180 lb. He jogs a mile in 8 minutes. How many calories has he used up?

What is the least value of 5:10

When six is subtracted from five times a number, the result is 9

What is the product of (-1.5) (0.8) ?

Harold brought three pounds of red apples and 4.2 pounds of green apples from the grocery store we're both kinds of apples are $1.75 a pound how much did Harold spend on apples

4-t=3 (t-1) - 5 solve the equation

Give a counterexample for the statement: 'All square roots are irrational numbers'. Explain your reasoning.