Mentone, indiana, claims to have the world's largest egg sculpture. a 6-foot- tall person standing next to the egg sculpture casts a shadow that is 2 feet long. if the egg casts a shadow that is 4 feet long, how tall is the sculpture?

How do you use the elimination method for this question? explain, because i really want to understand!

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.

What are the excluded values? m+5/mn+3m