Round 521,742 to the nearest thousand. 522,000 521,000 521,700 520,000

Me figure out the process to determine x you appreciate it : )

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

Jim had 3,067.48 in his checking account he wrote a check to pay for two airplane tickets. his account now has 1,845.24.