A certain region of America with over 500,000 households has a mean household income of $70,000 with a standard deviation of $20
1 answer:
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Step-by-step explanation:
I'm not sure where a is supposed to be in this equation, but I'm going to assume it's supposed to be written as either 3a x 4b = 54, or 304b = 54a. If it's something else, let me know, but I'll just answer these two for now.
1. 3a x 4b
So we know that b is equal to 9. Therefore, we can rewrite
as
To get rid of a multiplier on one side, divide both sides by the number you want gone. I'll use 4(9), which equals 36.
Then we can divide by 3 to get
0.5 isn't a viable answer, so I'll try the second interpretation.
2. 304b = 54a
This one is a bit easier. All we need to do is divide both sides by 54 to get
304 x 9 = 2736
2736/54 = 50.66...
Again, not a viable answer. Please edit your question to include a and I'll give it another shot!
<h3>Answer: 0.1319</h3>
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Work Shown:
Side note: you can use the nCr formula to compute ; however, it's much quicker to use the shortcut formula
. You can also use Pascal's Triangle to find the value of