What múltiples to 18 and adds to -10

The line y = x + passes through (−3, 7) and is parallel to y = 4x − 1.

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

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?