The Difference of the squares of 2 negative real numbers is 12; the product is 8. Find the smaller of the 2 numbers

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?

When is g(x) = 0 for the function g(x) = 5.23x + 4?

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount