In my fish tank, the ratio of red fish to blue fish is 3: 5. there are 20 blue fish. how many red fish are there?

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)