Problema Solution
Write the equation. Becca runs 5 miles everyday. To train for a race she adds one mile every day for 10 days. She runs one mile in 6 minutes. How long does she run each day?
Answer provided by our tutors
the 1st day she runs 5 miles in 5*6 = 30 min
the 2nd day she runs 5 + 1 = 6 miles in 6*6 = 36 min
the n th day she runs 5 + (n - 1) = 4 + n miles in (4 + n)*6 = 24 + 6n min
the equation describing the time she runs on the n th day is
f(n) = 24 + 6n
on the n th day she will run (24 + 6n) minutes.