The price of a cup of coffee was

$2.30

yesterday. today, the price rose to
$2.55
. find the percentage increase. round your answer to the nearest tenth of a percent.

Add or subtract polynomial : –12qr? +13rq?

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)