Ruben bought 6 books for 21 $.each comic book was the same price

Which graph represents the solution set for the given system of inequalities? x+2y< 3 x+y> 4 3x-2y> 4

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

Due to bad planning, two of the local schools have their annual plays on the same weekend. while 457 people attend one, and 372 attend the other, only 104 people were able to attend both. how many people went to at least one play?