FIND the number of combinations 8C2
1 answer:
Answer:
8c2 = 28
Step-by-step explanation:
You can plug this into your calculator (on a TI-84, it's MATH -> PRB -> 3) as 8 nCr 2.
Let's try to understand what the output means, though! The nCr function is based on Pascal's Triangle (see the attachment for a picture).
When we do 8 choose 2, we are basically thinking about having 8 possible values and 2 spots to fit them in, and we don't care about what order they're in. The probability of this is 8*7 / 2 = 28. Our answer makes sense!
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The sales price is $15.2
Step-by-step explanation:
Given,
Discount = 80%
Original price = $76
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Keywords: Subtraction, percentage
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Answer:
They are equal.
Step-by-step explanation:
First, we can simplify the second equation by multiplying 7 times 6 and then 7 times 5 due to the distributive property.
Therefore, using the distributive property, they are equal.