Question

Medal: A standard showerhead in Jen's house dispenses 5 gallons of water per minute. Jen 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 Jen save each day with the change in showerheads if she uses the shower for 8 minutes each day?

16 gallons
17 gallons
32 gallons
37 gallons

Answer 1

@Will.H

Answer 2

@563blackghost

Answer 3

So the original is
y = 5x

The saving- process system is y = 3x

solve for both when x = 8

y = 5x when x = 8
y = 5* 8
y = 40

The other system
y = 3x when x = 8
y = 3 * 8
y = 24

The saving is : 40 - 24 = 16gallons

Answer 4

You first need to determine the amount of water she `used` with the oringinal shower head. We now it uses `5 gallons a minute` so we would multiply that by 8.

\(\huge\bf{o=5(8)}\)

Once that is found we find the amount used with the new shower head.

\(\huge\bf{y=3(8)}\)

We would then subtract the two to see how much she saves.

\(\huge\bf{o-y=?}\)

Answer 5

or as @Will.H said ^.^

Answer 6

Nicely done :)

Answer 7

Thanks ghosty you too :)

Answer 8

thank you will :)

Answer 9

thanks!!