Find the equation of the line shown. Plz help
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1. are the triangles similar and if so why? what is the value of x? show your work.

Which expression is rational? 6. , square root two, square root 14, square root 49

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.