PLEASE ANSWER CORRECTLY AND GIVE A SMART NICE ANSWER PLZ.

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

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

If a is a nonzero real number then the reciprocal of a is