A library is having a book sale. Hardcover books sell at $5 and paperbacks are $3 each. If buys 12 books and spends exactly $54, how many of each type of book
did she buy?
Please hel

Multiply. −2x(6 x 4 −7 x 2 +x−5) express the answer in standard form. enter your answer in the box.

X+y=-4 x-y=2 use elimination with adding and subtraction

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.