I would realy apreciate any help with these questions. Thanks a lot

label Mathematics
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Apr 6th, 2015

Hi. I just returned. Ok, I'll do this one too.

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Apr 6th, 2015

Thank you very much Vincent . If you don't mind it would be good to see some show work in order to understand how do you get  to the final results. In this way I could understand how to do these kind of exercises.

Apr 6th, 2015

3. 8(3/4x - 1/4) - 6(12 - x)

We just distribute to get:

(8)(3/4x) - (8)(1/4) - (6)(12) + (6)(x)

= 6x - 2 - 72 + 6x

= 12x -74

4.  Abbey's expression is 2m - 0.2(2m)

= 2m - 0.4m = 1.6m

Renato's expression is 8(m/5)

= (8/5)m = 1.6m

So, YES, the two expressions are equivalent.

5.  (3/7x+9) - (3/7x - 3)

Remember to distribute the (-) sign:

3/7x + 9 - 3/7x + 3

= 12

Apr 6th, 2015

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