Which is a better deal on a $39.99 item: 50% off original price or 40% off, plus additional 20% at the register?

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

The triangles are similar. what is the value of x? show your work.

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%