Given that a/b=3/5 and b/c=4/5 find a:b:c giving your answer in its simplest form

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.

Write and solve a real word problem that involves determining distance on a coordinate plane

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.