Asked by shynice

x:4 and 45:20
a.8
b.9
c.10
Answered by Reiny
I assume these two ratios are supposed to be the same.

x:4 = 45:20
x/4 =45/20

times 4

x = 4(45/20) = 9
Answered by shynice
like i know the answer how i explain
Answered by Ms. Sue
x:4 = 45:20

Cross multiply the two middle numbers. Cross multiply the first and last numbers.

20x = 180

Solve for x.

x = 180/20

x = 9
Answered by shynice
oh so that's how i explain
Answered by Ms. Sue
Yes.

Answered by shynice
okay thx
Answered by shynice
so in the middle what does solve for x mean?
Answered by Ms. Sue
Solve for x means find out what x is.

Answered by shynice
x is approximately equal to y.
Answered by Ms. Sue
There is no y in this problem.

Answered by shynice
so 4 ios the x
Answered by shynice
okay mean so 4 is the x
Answered by shynice
i put so x is 4
Answered by Ms. Sue
No.

I told you earlier.

<b>x = 9 </b>
Answered by shynice
okay thank u i got it
Answered by Ms. Sue
You are welcome.
Answered by shynice
i appreciate because i was lost explaning
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