In order to select new board members, the French club held an election. 21 members voted in the election and 54 did not vote. What percentage of the members voted?

Hannah is 3 years older than twice her brother joey’s age. joey is 2 years old. how old is hannah? show all of your work! the number of students is five more than seven times the number of teachers. there are 10 teachers. how many students are there? be sure to show all of your work!

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.

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.