You can model an arch at your school using the equation y=-0.9(x+3)(x-3), where x and y are measured in feet. The x-axis represents the ground. Find the width of the arch at ground level

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

step-by-step explanation:

yes it represnts a functio, their are not 2 of the same numbers on the both sides