The time required to drive a fixed distance varies inversely as the speed. it
takes 5 hr at a speed of 80 km h to drive a fixed distance. how long will it
take to drive the same distance at a speed of 70 km /h?

Factor this polynomial completely x^2-64

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?

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.