The price of a radio was discounted 20% on the first day of a sale. the sale price was then discounted an additional 20% on the second day. what percent was the combined discount?

Plzzz plzz maths ! quadratic sequences =an^2+bn 1) 1,6,15,28,45 2)5,18,39,68,105 3) 1,8,21,40,65 4) 7,24,51,88,135 5) -1,2,9,20,35

Question 101 points)which equation in slope-intercept form represents the line that passes through (5, 1) and(-4,7)

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?