Write the difference as a sum.
-15 - (-7)

Little’s law firm has just one lawyer. customers arrive randomly at an average rate of 6 per 8 hour workday. service times have a mean of 50 minutes and a standard deviation of 20 minutes. how long does a customer spend at little’s law firm on average?

Which of the following represents the range of the graph of f(x) below

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers