ASAP
- WILL MARK BRIANIST
Please explain

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project

20 points + brainliest answer + my mom’s chocolate chip cookie ! subtract.