0.2B + 0.1S = C

Question

Rhia is using the above equation to investigate the carbon footprint, C, in kilograms of carbon dioxide (CO2) emissions, for her morning commute which S miles are by subway and B miles are by bus. How many kilograms of (CO2) per mile does the bus portion contribute to Rhia's carbon footprint?

Answer 1

0.2 kg/mile * B miles = kg from bus
so
0.2

Answer 2

thank you