Placed the following quadratic in vertex form by completing the square and then state the coordinates of its vertex? Y=x^2+18x-12

What is the slope of the line shown below?

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.

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)