Can someone plz plz help me with this question

For a read-a-thon, jay and odhràn each started reading a book at the same time and continued reading for several hours. jay's book had 278 pages, and he read 55 pages per hour. odhràn's book had 238 pages, and he read 45 pages per hour. after how many hours did they have the same number of pages left, and how many pages were left?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12