Question

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Answer 1

ok what do you want to find

Answer 2

I need to show the work on how I found the answer 25 and 30

Answer 3

Ok first to find y what is 20/12

Answer 4

1.66

Answer 5

ok 15*1.66

Answer 6

25

Answer 7

did you round up?

Answer 8

yep

Answer 9

so we found what x was no we have to find y

Answer 10

sorry x

Answer 11

15/1.66

Answer 12

woul round down to 9

Answer 13

EG=30, how so

Answer 14

ok 30/18 is

Answer 15

same thing

Answer 16

the proportion of a smaller shape to a bigger shape is 3/4.

Answer 17

so multiply 30 by 1.66

Answer 18

sorry not 30 18

Answer 19

and you get 30

Answer 20

so that would round up to 30?

Answer 21

@SolomonZelman how did you get that?

Answer 22

yep sorry my computers doing wierd things

Answer 23

that's what would assume at least about the proportions, when same shapes are posted like this:) if you know what I mean.

Answer 24

preciseness is always good though \(\color{red}{{;) }}\)

Answer 25

I get a 3:5

Answer 26

So Another way to look at it...is the proportion of the smaller shape to the bigger shape = 3/5

So every length on the smaller shape is 3/5 as big as the bigger shapes...

So when you are solving for 'y' there....

You see on the smaller shape it is 15....and that would be 3/5 of some number ...we have

\[\large \frac{15}{ \frac{3}{5}} = 15 \times \frac{5}{3} = 25\]

That's for 'y'

Answer 27

AH DANG IT ! Just a calculation error, tnx for pointing out @radar

Answer 28

It was solved using 1 2/3 or 5/3 ratio.

Answer 29

And since they gave you what AC is equal to...same thing...

That is the smaller length....so that is 3/5 of a number....which you are given as 18

\[\large \frac{18}{\frac{3}{5}} = 18 \times \frac{5}{3} = 30\]

That is how you can use proportions to solve this type of problem

Answer 30

No problem, Dmb1215 solved it, and I hope it was clear to hollylive that it was assumed as similar figures.

Answer 31

In fact, hollylive had the answers, they were just showing how they came about.