What is the solution to this system?

2x-y+z=-2
x+3y-z=10
x+2z=-8

Aculture started with 3000 bacteria. after 5 hours it grew to 3900 bacteria. predict how many bacteria will be present after 9 hours

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

Taylor wants to paint his rectangular deck that is 41 feet long and 24 feet wide. a gallon of paint covers about 350 square feet. how many gallons of paint will taylor need to cover the entire deck? round your answers to two decimal places when necessary.