Mary is 3 years older than twicw her brothers age what expression represents marys age

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

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.

How do i find the missing angle measure in a polygon