Andrea argues that(5m-3)(2m+4) models the closure property. What reasoning could Andrea use to argue that multiplication of polynomials is closed?

Solve by any method (graphing, substitution or linear combination)y = x - 82x + 3y = 1a) (2, -6)b) (5, -3)c) (4, -4)d) (0, -8)i figured it out. the answer is (5, -3)

What is the number 321,000,000 in scientific notation? also what is the number? ?

Which fraction is equal to 1hole and 2/5? a.3/5 b.75 c.57 d.73