Mathematics
11 Online
OpenStudy (anonymous):
A.
12/7
B.
8
C.
240
D.
480
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OpenStudy (anonymous):
OpenStudy (igreen):
Same as last time.
OpenStudy (igreen):
\(\sf \dfrac{6 \times 5 \times 4 \times 3 \times 2 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2}{7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 4 \times 3 \times 2}\)
OpenStudy (anonymous):
=)
OpenStudy (anonymous):
@iGreen
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OpenStudy (anonymous):
why is there an ! marked there ?
OpenStudy (anonymous):
I'm not sure.
OpenStudy (igreen):
\(\sf \dfrac{\cancel 6 \times \cancel 5 \times \cancel 4 \times \cancel 3 \times \cancel 2 \times 8 \times \cancel 7 \times 6 \times 5 \times \cancel 4 \times \cancel 3 \times \cancel 2}{\cancel 7 \times \cancel 6 \times \cancel 5 \times \cancel 4 \times \cancel 3 \times \cancel 2 \times \cancel 4 \times \cancel 3 \times \cancel 2}\)
OpenStudy (igreen):
Which leaves us with?
OpenStudy (anonymous):
6x5
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OpenStudy (igreen):
And 8
OpenStudy (igreen):
8 * 6 * 5
OpenStudy (igreen):
= ?
OpenStudy (anonymous):
you are going to have to teach me @iGreen
OpenStudy (anonymous):
240 ?
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OpenStudy (igreen):
Yep, you got it.
OpenStudy (anonymous):
Oohh didn't see that so it would be 240
OpenStudy (igreen):
The exclamation mark tells you to multiply that number to all the whole numbers that come before it.
OpenStudy (anonymous):
Ohhhh
OpenStudy (anonymous):
i love you @iGreen
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OpenStudy (igreen):
For example,
\(\sf 12! \rightarrow 12 \times 11 \times 10 \times 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1\)
OpenStudy (anonymous):
i see
OpenStudy (igreen):
But we can just leave out the 1, since multiplying by 1 doesn't change anything.
OpenStudy (anonymous):
@iGreen ddsae wouldnt remove something until i got alot of people can that be reported ?
OpenStudy (anonymous):
yeh
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OpenStudy (igreen):
?
ddsae?
OpenStudy (anonymous):
user name on here
OpenStudy (anonymous):
come to what i was on plz