Mark is taking pledges for a bike-a-thon fundraiser. John pledged $3.75, plus $1.45 for each mile that Mark bikes. Kiara pledged $6.25, plus $0.55 for each mile that Mark bikes. Part A: Write expressions for the number of dollars John pledged and the number of dollars Kiara pledged. Use m for the number of miles that Mark bikes.
Part B:
Add two expressions from the answer above to find the combined amount that John and Kiara pledged in terms of m.