Question

Suppose that 19 inches of wire costs 57 cents. At the same rate, how many inches of wire can be bought for 36 cents?

Answer 1

you're given the conversion factor here 19 inches of wire = 57 cents, put it on paper and solve the problem using this

Answer 2

Hmm

Answer 3

On the chart it says 1 cm = .3937 in but I'm not sure how it would help here

Answer 4

\[36 cents \times \frac{ 19 inches }{ 57 cents }\]

Answer 5

I got 12 as my answer

Answer 6

that is it :)

Answer 7

Another question

Answer 8

36 cents on top cancel with 36 cents on the bottom and you're left with units of (inches of wire)

Answer 9

I meant 57 cents on the bottom :)

Answer 10

only the units... not the numbers

Answer 11

So would I have to do the same step with this: Greg drove 605 miles in 11 hours. At the same rate, how many miles would he drive in 13 hours?

Answer 12

605 x 11 over 13?

Answer 13

yes

Answer 14

but look... the numbers don't matter... is about the units, you have to make sure that you cancel the units you don't need and stay with units u need for your problem

Answer 15

605 cancels itself? So just divide the 11 and 13 then?

Answer 16

the numbers do not cancel... the units do :)

Answer 17

I got 511.923 :/

Answer 18

\[13 h \times \frac{ 605mi }{ 11 h } = ?\]

Answer 19

Oh >.>

Answer 20

set up like this... h = hours... so h on top cancels with h on the bottom and you're left with units of mi = miles :)

Answer 21

and now do the operation 13 x 605... all divided by 11

Answer 22

Does it always have to be h/h? It was 715

Answer 23

hours divided by hours cancels the units... if you're trying to know how many miles... then make sure you're left with (mi) units by canceling hours

Answer 24

It makes sense now, thank you

Answer 25

good :)