Does any one have advice for an eighth grader on taking algebra 1 eos (end of semester test)?

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour.what is the cyclist average rate for the round trip in miles per hour ?

Which of the following is an irrational number