Answer:
-12
Step-by-step explanation:
To evaluate the combination we proceed as follows:
21C3
Given nCk we shall have:
n!/[(n-k)!k!]
thus plugging the values in the expression we get:
21!/[(21-3)!3!]
=21!/(18!×3!)
=1330
Answer: 1330
-2y=-3x+6
y=1.5x+-3
the slope is 1.5