Find the value of X: 120,150,75,60

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20