A recipe requires 1/4 of oil for every 2/3 cup of water. How much oil (in cups) is needed per cup of water?

Plz hurry evaluate the expression a+b where a=8 and b=19

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.

Write the factored form of this trinomial 9x^2+18x-7