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Mathematics 15 Online
OpenStudy (anonymous):

Perform the indicated operations.

OpenStudy (anonymous):

OpenStudy (anonymous):

anyone?

OpenStudy (anonymous):

@pooja195

OpenStudy (anonymous):

First get common denominator.

OpenStudy (anonymous):

20?

OpenStudy (anonymous):

Yeap, thats a great way to start.

OpenStudy (anonymous):

ok now what?

OpenStudy (anonymous):

Combine it into a single fraction.

OpenStudy (anonymous):

a+2+a-1+a-3?

OpenStudy (anonymous):

You got: \[\frac{a+2}{4b}-\frac{a-1}{10b}+\frac{a-3}{5b}\]\[=\frac{5(a+2)}{20b}-\frac{2(a-1)}{20b}+\frac{4(a-3)}{20b}\]

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

Now we have the same denominator. Now we want to get them into a single fraction. So we get: \[\frac{5(a+2)-2(a-1)+4(a-3)}{20b}\]

OpenStudy (anonymous):

Now the next step would be to simplify the nominator.

OpenStudy (anonymous):

5a+10-2A+2+4A-12

OpenStudy (anonymous):

Correct

OpenStudy (anonymous):

Try so simplify it further

OpenStudy (anonymous):

7A

OpenStudy (anonymous):

Yes, so the final answer is \[\frac{7a}{20b}\]

OpenStudy (anonymous):

7A/20B?

OpenStudy (anonymous):

Yea! good job :)

OpenStudy (anonymous):

THANKS I HAVE ONE MORE QUESTION

OpenStudy (anonymous):

sure

OpenStudy (anonymous):

Solve the inequality.

OpenStudy (anonymous):

OpenStudy (anonymous):

these are ones i don't understand

OpenStudy (anonymous):

Okay, lets get common denominator first.

OpenStudy (anonymous):

6

OpenStudy (anonymous):

Yeap, so we get\[\frac{2x}{6}+\frac{3(1-x)}{6}\ge1\]

OpenStudy (anonymous):

Lets put it into a single fraction.

OpenStudy (anonymous):

\[\frac{2x+3(1-x)}{6}\ge1\]

OpenStudy (anonymous):

Try and simplify the nominator

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