Answer:

On this case n =6 and x =6 we got:

Step-by-step explanation:
The utility for the combination formula is in order to find the number of ways to order a set of elements
For this case we want to find the following expression:

And the general formula for combination is given by:

On this case n =6 and x =6 we got:

Answer:
True
Step-by-step explanation:
They are the same but different sizes.
Hi,
(a+b)(a-b=a²-b²
Thus (9x)²-5²=81x²-25
Answer:
A. ⁵/2
Step-by-step explanation:
The slope of the line that is perpendicular to y = -⅖x + ⅘ is the negative reciprocal of the slope of y = -⅖x + ⅘ .
Slope of y = -⅖x + ⅘, is -⅖.
Negative reciprocal of -⅖ = 5/2
Therefore the slope of the line that is perpendicular to y = -⅖x + ⅘ is ⁵/2