Question

Need an explanation @iambatman @jamesr

Answer 1

I need help figuring out how to solve something like this.

Answer 2

A standard showerhead in Marty's house dispenses 7 gallons of water per minute. Marty changed this showerhead to an energy-saving one. The equation shows the amount of water dispensed, y, as a function of the number of minutes, x, for the new showerhead.

y = 3x

How much water does Marty save each day with the change in showerheads if he uses the shower for 8 minutes each day?

Answer 3

I just need someone to explain how to do it.

Answer 4

@iambatman

Answer 5

The standard showerhead uses 7 gallons per minute.

In 8 minutes, it uses

\(7~ \dfrac{gallons}{minute} \times 8~minutes = 56~gallons\)

The energy-saving showerhead uses water according to the equation

y = 3x, where y = number of gallons, and x = minutes.

For 8 minutes, we let x = 8

y = 3(8)

y = 24

The daily savings of water is 56 gallons - 24 gallons
What is 56 - 24 = ?
Since y = number of gallons, this means that the energy-saving showerhead uses 24 gallons of water in 8 minutes.