Find the percent of tip cost of meal $18.50, tip $2.59

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean

Solve 3x-18=2y and 5x-6y=6 by elimination show work

What is the result of adding the system of equations? 2x+y=4 3x-y=6