81 water bottles in 9 cases?

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

Olive's solar powered scooter travels at a rate of 30 miles per hour. what equation can she use to calculate her distance with relation to the time she traveled? h=hours m=miles 1. h=m+30 2. m=30h 3. m=h+30 4. h=30m

Shannon drove for 540 minutes. if she traveled 65 miles per hour,how many total miles did she travel?