Your teacher said you could use notes cards on the test. You studied and wrote seven note cards. On the day of the test your teacher said you can only use three note cards.
How many different sets of three note cards can you choose between?

1. a parachutist is 800 feet above the ground when she opens her parachute. she then falls at a constant rate of 5 feet per second. select the equation that represents this situation. h = -800t + 5 y = -5x + 800 h = 5t - 800 y = 800x + 5 i need