The circle graph shows the results of a survey that asked 80 people which method of transportation they use to get to the city park.

How many people walk to the city park?

Which values of p and q result in an equation with exactly one solution? px-43=-42x+q choose all answers that apply: a) p=-43 and q=-43 b) p=42 and q=43 c) p=43 and q=−42 d) p=42 and q=42