How help me pls i tried so many

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Consider circle h with a 3 centimeter radius. if the length of minor arc what is the measure of zrst?

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.