Water flows from a container at a rate of 2.5 litres per minute . The water flows into a tank that already holds 50 litres. How long in seconds is it before there are 765 litres in the tank.
y = 2.5x + 50.....with y being the total liters in the tank and x being the number of seconds
when total liters is 765....so sub in 765 for y and solve for x 765 = 2.5x + 50 765 - 50 = 2.5x 715 = 2.5x 715 / 2.5 = x 286 = x <==== so it would take 286 seconds
