The selling price of an item is $650 it is marked down by 10%, but this sale price is still marked up from the cost of $450 find the markup from cost to sale price.

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?

Sandy is ordering bread rolls for her party,she wants 3/5 of the rolls to be whole wheat. what other factions can represent part of the rolls that will be whole wheat? shade the models to show your work.