Make a proportion the sales tax is a percent of the total purchase and you just have to figure that out. 1,200/100=72/x solving this i get 6% sales tax using that. I find the rest by taking 6% of 2500 =150. And for part b make another proprtion x/100=108/6. And i get 1800 dollars
4;81
You subtract 5 from 9 to get 4; 5(9)= 45 9(4)=36 45+39=81
I think the equation would be 5m+n=17 I might be wrong so sorry but that is what I think it is
Question: Simplify

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First off, you <em>never</em> want square roots on the bottom of a fraction, so let's multiply both sides by

to get rid of it. All we have to do from there is simplify!