if p inversely as Q and p=2 when Q=3 find the law of variation. p when Q=2 Q when p=1/2

Through non-collinear points there is exactly one plane.

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Timmy uses 1 1 2 cups of sugar for every 2 gallons of lemonade he makes. how many cups of sugar would timmy use if he makes 13 gallons of lemonade?