Answer:
A. The permutations rule takes order into account, whereas the combinations rule does not.
Step-by-step explanation:
Permutation is an orderly form of combination. They both deal with numbers an element can be arranged in different ways.
The main difference is that permutation takes into account the order in which the arrangement takes place while combination doesn’t take that into account.
Combination formula: nCr = n! / r! * (n - r)!
Permutation formula: P(n,r)=n! (n−r)!
Answer:
5y=9
Step-by-step explanation:
Answer:
65+30x
Step-by-step explanation:
You forgot to give the choices.
But, I would think it's 65+30x=
D = 25 ft is the length of a shadow. L - the length of a tree.
Two angles are 85° and 65° and the third is 180° - ( 65° + 85° ) =
= 180° - 150° = 30°.
We will use the Sine Law:
25 / sin 30° = L / sin 65°
25 / 0.5 = L / 0.9063
25 * 0.9063 = 0.5 L
22.6577 = 0.5 L
L = 22.6577 : 0.5
L = 45.3 ft.
Answer: the approximate length of the tree is 45.3 ft.
