4/5 - 1/10 + 3/4 + 5/2

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !