PLEASE HELP ME WITH THIS ONE QUESTION How many combinations without repetition are possible if n = 4 and r = 3?

A) 16
B) 12
C) 3
D) 4

Given:

and .

To find:

The combinations without repetition are possible if and .

Solution:

Combination of selecting r item from total n items is:

We have and . By using the above formula, we get

Therefore, the correct option is D.

step-by-step explanation:

. your answer will contain x - and y -terms. (1 point) x ( ¿¿ 2 − 7 ) 2 +( y 2 − 9 ) 2 √ ¿ 12. what is the distance from the directrix (the crocodile river) to the point ( x , y )? write this equation. your answer will contain a y -term.

y-y1=4(x-x1)

step-by-step explanation:

this is point-slope form since you only have 4 as the slope it goes in place of m

hope this : )