My answers to questions 25 to 30
(We multiply the fraction by the conjugate of the denominator over the conjugate so we can get rid of the square root, and not get a middle term in our multiplication because the -5 and the +5 will result in a cancellation once multiplied out)
P.S. I apologize for saying 29 was incorrect for the wrong reason before. I hadn't looked at the question, and I misread it as an approximate decimal. But, it's correct now.