A normal distribution has a mean of μ = 100 with = 20. If one score is randomly selected from this distribution, what is the probability that the score will have a value between X = 100 and X = 130?

30 is 6 multiplied by a number y as a equation

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

Solve x+3y=6 and 4x-6y=6 by elimination . show work !