Help please my parents said if I get good grades they were going to buy me a phone for Christmas please help

How do i do this activity, is appreciated

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

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.