Solve the system of equation algebraically and y = 1/2 x + 3

Which number produces a rationale number when multiplied by 1/5

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.

Rewrite the following quadratic functions in intercept or factored form. show your work. y = x^2 + 7x + 10