Say i have an 81 in a class and my final assignment is 30%of my grade, if i fail how much will that bring my grade down?

An appliance store sells a washer-dryer combination for $1800. if the washer costs $300 more than the dryer, find the cost for each appliance.

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?

What is the benefit of converting measures in a ratio to the same unit