Gretchen withdrew $31.45 from the bank to buy groceries. then she deposited a check for $27.89 in the bank. which expression represents the net change in her account balance as a result of these two transactions? what is the net change in her account balance?

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.