How to find the value of the combination? show your work! thansk!

A

Step-by-step explanation:

Using the definition

n =

where n! = n(n - 1)(n - 2).... × 3 × 2 × 1

Then evaluating numerator and denominator

10

=

=

Cancel 7(6)(5)(4)(3)(2)(1) on numerator/ denominator, leaving

= = = 120

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6

=

=

Cancel 4(3)(2)(1) on numerator/ denominator, leaving

= = 15

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Dividing numerator by denominator gives

= 8 → A

1d

2b

3 false

4 d

5 3200sq,ft

80+60+y=180

then divide the difference between 60 and y and add it to 180

so x =180 +( (y-60)/2)

x equals 200

step-by-step explanation:

8

(d)

step-by-step explanation:

given: the line in the graph passes through points (5,30) and (6,26).

then, the equation of line is:

now, put y=a(n) and x=n,

hence, option d is correct.