How can you turn 4512 into a mixed number?

Which of the following is true for the relation f(x)=2x^2+1

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

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