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!
Answer:
12
Step-by-step explanation:
well i we divide by the subtraction equation of t he squaer hypotenuse between four right angles then we can then make use of e=mc² which allows us to deduce that the answer is 12.
where is the answers to chose from
Answer:
y = -7 and x = -36
Step-by-step explanation:
x - 4y = -8
5y - 1 = x
→ Substitute 5y - 1 into x - 4y = -8
5y - 1 - 4y = -8
→ Simplify
y - 1 = -8
→ Add 1 to both sides
y = -7
→ Substitute y = -7 into 5y - 1
( 5 × -7 ) - 1 = -36
It’s a composite because it has a multiple other than itself
