What is the probability that the code number for a new customer will begin with a 7

The product of two negative rational numbers is always zero sometimes zero never zero

If lmn=xyz, which congruences are true by cpctc? check all that apply

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1