3) Which recursively defined function represents the sequence 3,7,15,31,..?
1) A1) = 3, f(n+ 1) = 2*4 + 3
3) f(1) = 3, fin + 1) = 2f(x) + 1
2) f(1) = 3, fin + 1) = 2**) - 1
4) f(1) = 3, fin + 1) = 3f(n)-2

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Who long does it take to drive 150 miles at 45 miles per hour

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?