Evaluate 3xy- y + 6z when x = 1, y = - 2 and z = 3

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.

Can anyone me get through my algebra 2 class? the only class i need to graduate..