4. (y + 3d) – (–9y + 7d) (1 point)
–10y + 4d
–8y + 10d
8y – 6d
10y – 4d
5. The distance from Newtown to Oldtown on the highway is (6x2 + 2x – 2) miles. Using the back roads, the distance is (5x2 – 8x – 6) miles. How many miles shorter is the second route? (1 point)
11x2 + 10x – 8
–x2 – 6x + 4
x2 + 10x + 4
x2 – 6x – 8