Jim invested $6000 at 4% simple interest. how much interest will he earn the first year?

If 20% of a number is 35, what is 50% of that number?

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?

How are algebraic expressions evaluated using substitution?