7 Brady mixed 4 ounces of red paint with 7 ounces of blue paint to create purple. Henry wants to create the same
color. He needs 20 ounces of purple. How many ounces of blue paint should he buy? Round your answer to the
nearest tenth

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.