answer: 7 x 2/5 = 2.8 hours, is your answer. your welcome! : 3
step-by-step explanation: first work out how long it took to hose 1/7 of the lawn which is 2/5 hours. times that by 7 to get the whole lawn.
sorry i don't know the other answer. i didn't learn what a proportional relationship is.
as we don't know if g(x) is continue,
vertex is (2,-7) ( a minimum since coefficient of x² is > 0)
just go here
its what i use