In 25 minutes li can run 10 laps around the track find the constant of proportionality

What is the prime factorization of 195

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Atorch and a battery cost 2.50 altogether.the torch costs 1.50 more than the battery.what fraction of the total price is the torch? give your answer in its simplest form.