A is irrational but b is rational. This is because for b you can work out both square root of 64 (8) and square root of 4 (2). But for a, the square root of 5 is an irrational number :)
Probably 2520$ that will be how many she would hav
A line segment has a definite ending and beginning
Divide everything by the "X" thing AND MOVE IT TO OPPOSITE SIDE