Question

A standard showerhead in Sonia's house dispenses 12 gallons of water per minute. Sonia 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 Sonia save each day with the change in showerheads if she uses the shower for 8 minutes each day?
9 gallons 17 gallons 72 gallons 93 gallons

Answer 1

please help me

Answer 2

The old shower uses

\[\frac{ 12 ~gal }{ 1~\min }*\frac{ 8~\min }{ 1 ~day } = \frac{ 12*8 ~gal }{ day }\]

Answer 3

ok

Answer 4

Use the function to find the gallons per day for the new one...
8 min per day = x

Gallons used by new shower = 3 * x

Answer 5

So the new one uses 25 gallons each day if used for 8 min per day ...

the difference between the old and the new is the answer they want

Answer 6

24 gallons, sorry , not 25

Answer 7

ok i understand it now

Answer 8

Water saved each day = (Old shower rate) - (New Shower Rate) =

Answer 9

k

Answer 10

wait

Answer 11

ya

Answer 12

24-12=12 but 12 isnt one of the answer choices

Answer 13

Old shower rate = (12*8) = 96 gal/day

New Shower Rate = 3*8 = 24 gal/day

Answer 14

oooooooooooooooooh

Answer 15

so its 96-24

Answer 16

Yes

Answer 17

ok thanks

Answer 18

If you dont know to multiply or divide,

Look at the first thing i typed and notice how the units cancel to give you what you are looking for, gal/day

Answer 19

welcome