In david's class, 3/5 of the boys build model rockets to launch. instead of parachutes, streamers were used on 2/9 of the rockets, to slow them down. what fraction of the boys build rockets that had streamers?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Can someone me with this problem . show your work .

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36