Y=4x^2-48x+147 identify the axis of the symmetry of the quadratic equation

Iam so stuck. what is the worked out answer for this question?

Which function has the same domain as y=2x

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers