Jessica, Dan, and Kevin sent a total of 72 text messages over their cell phones during the weekend. Dan sent 8 more messages than Jessica. Kevin sent 2 times as many messages as Dan. How many messages did they each send?

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

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10