Charles buys 30 packs of pens. There are 15 pens in each pack.
Each pack costs £4.60.
Charles sells each pen for 80p but he only manages to sell
3
5
of the pens.
How much profit did he make

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 absolute value of the complex number -4-sqrt2i

Find all solutions for 2y - 4x =2 y = 2x + 1 site: socratic.org