The difference of 9 times a number and 2 is 67. write an equation that can be used to find the unknown number?

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

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

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?