Rationalize the denominator if the numerator is 7 and the denominator is sqrt(7) - sqrt(3).

3(10x-y)-5(x-y^2) need this solved asap

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.