Given that the triangles are similar, what is the value of x (answer to the nearest tenth)?

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36

How can writing phrases as algebraic expressions you solve problems?

Rewrite the polynomial -9x5 + 36x4 + 189x3 in factored form.