Which expression does not represent "the sum of n and 6"?

1. 6+n
2. n+6
3. 6n

The variable z is directly proportional to x, and inversely proportional to y. when x is 4 and y is 13, z has the value 1.2307692307692. what is the value of z when x= 9, and y= 20

Use the elimination method to solve the systems of equations. choose the correct ordered pair. 7x+4y=39

Two florida panthers were weighed. one weighs 6x+21 pounds and the two together weigh 14x+11 pounds how much does he other panther weigh alone