Question

Using the values and variables given, write an inequality describing how many oil changes and tire changes Carlos can do in less than 3
hours (180 minutes).

At Carlos's auto shop, it takes him 12
minutes to do an oil change and 24
minutes to do a tire change. Let x
be the number of oil changes he does. Let y
be the number of tire changes he does.

Answer 1

so first thing to note that whatever equation u write has to be <3hrs

Answer 2

right

Answer 3

so if x is number of oil change and it takes 12min to do these
and y is tire changes and it takes 24mins to do these
what do u think the equation should look like making sure t is <3

Answer 4

it would be 12x + 24y< 3hrs right?

Answer 5

but what would be put as "x" or "y"

Answer 6

to be less then 3 hrs and how would you figure that out?

Answer 7

yeah excellent..
ur equation is right

Answer 8

but if u need to find individual values
you will need to seperate the equation
so
12x<3
24y<3

Answer 9

then solve for individual unknown x and y

Answer 10

oh sweet thanks ! :D

Answer 11

I got .25 for x and .125 for y .. would that be right ? considering those are weird numbers o.o

Answer 12

yeah they are both right
to prove this of u put it back in ur original equation
12x+24y<3
it should be true

Answer 13

okidoke thanks again ! :)