Is 15 inches, 13 inches, 12 inches a right triangle

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?

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.

If the line in the graph is shifted up two units which is the equation of the new line