Plz help...

I’m offering 10 pts

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi

Martha is training for a duathlon, which includes biking and running. she knows that yesterday she covered a total distance of over 55.5 miles in more than than 4.5 hours of training. martha runs at a speed of 6 mph and bikes at a rate of 15.5 mph.

How do i create an equivalent expression that includes parentheses so that the value of the expression is 2 for 3+8-4x2-12