Determine which system below will produce infinitely many solutions.

−6x + 3y = 18
4x − 3y = 6

2x + 4y = 24
6x + 12y = 36

3x − y = 14
−9x + 3y = −42

5x + 2y = 13
−x + 4y = −6

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)

An air conditioning system can circulate 350 cubic feet of air per minute. how many cubic yards of air can it circulate per minute?

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r