What is the comm9n denominator of 2/3 & 3/4

Factor this polynomial completely x^2-64

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.

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.