I’ll mark brainliest please help!!

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

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

Anew shopping mall is gaining in popularity. every day since it opened, the number of shoppers is 5% more than the number of shoppers the day before. the total number of shoppers over the first 10 days is 1258 how many shoppers were on the first day?