Solve for y. 17)c=11+ 5hy

18)4x-7y= 24

19)7y=5x

20)a = by

help, please and thank you

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?

If the value of cos330°is√3/2 then find cos 165°.

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.