What is the sum of 5x-6y+z and 5x-6y-z

Negative 5 1/12 + negative 4 1/4 + 6 3/4

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

Find the quotient with the restriction.