Assuming that we want to find out which car is the best and,

assuming the Ford gets 7 out of 10 for appearance, 5 out reliability, 2 for Miles per gallon, and 8 for comfort. We calculate the weighted score of each car.

Recall on how to calculate the weighted score

https://www.thoughtco.com/what-is-a-weighted-score-3212065

Toyota: 0.1 \times 5 + 0.4 \times 9 + 0.2 \times 7 + 0.3 \times 6 = 0.5 + 3.6 + 1.4 + 1.8 = 7.3

Honda: 0.1 \times 6 + 0.4 \times 10 + 0.2 \times 8 + 0.3 \times 4 = 0.6 + 4+ 1.6 + 1. 2 = 7.4

Cadillac: 0.1 \times 4 + 0.4 \times 7 + 0.2 \times 3 + 0.3 \times 9 = 0.4 + 2.8 + 0.6 + 2.7 = 6.5

Ford: 0.1 \times 7 + 0.4 \times 5 + 0.2 \times 2 + 0.3 \times 8 = 0.7 + 2 + 0.4 + 2.4 = 5.5

So, the Honda has the greater weighted score and is the best.