Igot this paper and it had different graphing calculator questions and on one it says check your answer and i don't know what that means?

Igor stravinsky tires sells approximately 3,760,000 car tires and 1,200,000 truck tires each year. about 47,000,000 care tires and 26,000,00 truck tires are sold each year in the united states. what is stravinsky's market share in each of these two markets (cars and trucks)?

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?