21 - 4 5/6 i need to first estimate. then subtract to find the exact answer

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Me! i will mark you brainliest if you are right and show your i don't get polynomials and all the other stuff. multiply and simplify.2x(^2)y(^3)z(^2) · 4xy(^4)x(^2)show your

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$