Answer:
d is the answer and srry if im too laate
Answer:
1. 1/6 2. 80
Step-by-step explanation:
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1. Here,
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( Linear pair of angles measure upto 180° )
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Thus,
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Now, for y,
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( Vertically Opposite Angles)
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X:15 = 15:100
By solving x, we will get
x=225/100
x= 2.25
We have been given two expressions . We are asked to find the value of each.
To find 9P9, we will use permutations formula.
, where
P = Number of permutations,
n = The total number of objects in the set,
r = Number of objects being chosen from the set.
Using
To find 9C9, we will use combinations formula.
, where
C = Number of combinations,
n = The total number of objects in the set,
r = Number of objects being chosen from the set.
Using
Cancelling out , we will get:
The answers differ because order. With permutations we care about the order of the elements, while with combinations we don't.