How can you subtract mixed numbers when the fraction in the front number is less than the second fraction?

Can (2,3 and square root 10) be sides ona right triangle?

Problem melissa is her dad build a walkway in their backyard. the walkway will be 54 feet long and 1.5 feet wide. the local hardware store sells tiles which are 1.5 by 1.5 feet and come in boxes of 12. how many boxes of tiles do they need?

Acircle has a circumference of 28.36 units what is the diameter of the circle