Solve the proportion. Write your answer as a set of values. 2x is to 7 as 18 is to 21

Lee has $1.75 in dimes and nickels. the number of nickels is 11 more than the number of dimes. how many of each coin does he have?

There are 3232 forwards and 8080 guards in leo's basketball league. leo must include all players on a team and wants each team to have the same number of forwards and the same number of guards. if leo creates the greatest number of teams possible, how many guards will be on each team?

Y+ 2/y is it a polynomial in one variable or not? and if so, why?