On an assignment, Lindsy is asked to simplify the following problem: 10a2 + 8a
2a

She says the answer is 5a2 + 4a.
Is this the correct answer?
If she has made a mistake, please tell me how you would explain to her what she is doing wrong?

Find the missing part. use an improper fraction for your answer.

What is the inverse of the function f(x) = 2x + 1?

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?