Please help me I’m stuck on all these

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Write a story that matches with the expression 42x-5 pls hurry

If, while training for a marathon, you ran 60 miles in 2/3 months, how many miles did you run each month? (assume you ran the same amount each month) write your answer as a whole number, proper fraction, or mixed number in simplest form. you ran __ miles each month.