Help please. Much appreciated

Let w=23 . what is the value of w + 45 ?

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

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.