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
percent increase = (new -original)/original
= (1200-550)/550
650/550
=1 100/550
1 2/11
1.181818
118.18 percent
to the nearest whole number
118 %
Answer:
Step-by-step explanation:
5x-8=2x+7
3x=15
x=5
Answer:
n = -4
Step-by-step explanation:

in multiplication if the base are same u can add there exponent.

base of both sides are equal so their exponent will be equal
2n + 1 + 5 = n + 2
2n + 6 = n + 2
2n - n = 2 - 6
n = -4
37.7 is the circumference, 113.1 is the area, use a calculator for more in depth looks.