Please help me! With 3 and 7! I’ll mark brainliest

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

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

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827