Naji is shopping for a new outfit to wear to his sister's graduation. The shirt he wants cost $85 but it's on sale for 20% off. How much money will Naji spend on the shirt at it's sale price?
How much money does he save buying the shirt on sale?

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

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

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?