Sharon is paving a rectangular concrete driveway on the side of her house. The area of the driveway is 5x2 + 43x − 18, and the length of the driveway is x + 9. Additionally, Sharon plans to install a carport over a small portion of the driveway. The volume that the carport can enclose is 48x3 + 68x2 − 8x − 3, and the area of driveway beneath the carport is 8x2 + 10x − 3.

Determine the width of the entire driveway and height of the carport in terms of x. Replace the values of m and b to complete the expression that represents the width of the entire driveway on the first line, and then replace the values of m and b to complete the expression that represents the height of the carport on the second line.
help please on this