PLEASE ANSWER ME FAST!!

Juan is learning about like terms in his math class. He must check all the combinations below that are like terms. Which ones should he check?Choose all that apply.
- 3x and x
- One-fourth and 0.5
- –m and 8m
- –xy2 and 2xy2
- y and y2
- 4xy and –5x2y
- m and n
- –7 and 6