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artcher [175]
3 years ago
5

Directions - Write The Correct Number In Each Blank To Show The Community Property Of Addition.

Mathematics
1 answer:
sp2606 [1]3 years ago
4 0
X + 388 = 388 + 152
x + 388 = 540
-388 -388
------------------------
x=152
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What is 38.86 rounded to one decimal place, i might have forgot xP
Ganezh [65]
Lol but when rounding to one decimal place, that means to round only the first number after the dot which is 8, but then you have to look at the second number to see if you need to change the first number or not and since the second number is above 4 then you gotta round it up to 9. so the answer would be 38.9
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Whats the value of 13C11
vovangra [49]

Answer:

78

Step-by-step explanation:

nC_k = \frac{n!}{k!(n-k)!}

13 C_{11} = \frac{13!}{11! \times (13-11)!}

        = \frac{13!}{11! \times 2!}

       = \frac{ 1 \times 2 \times 3 \times 4 \times 5 \times 6 \times 7 \times 8 \times 9 \times 10\times 11 \times 12 \times 13}{(1 \times 2 \times 3 \times 4 \times 5 \times 6 \times 7 \times 8 \times 9 \times 10\times 11 )\times ( 1 \times 2)}

        =\frac{12 \times 13}{2} \\\\= 6 \times 13\\\\=78

       

4 0
3 years ago
In a certain​ year, the average​ e-mail user sent or received 162 e-mails each day. the number of​ e-mails received was 66 more
Fantom [35]
Let the number sent = nLet the number received = 66n + 2  Set up an equation using the variables and info given. n + 66n + 2 = 16267n + 2 = 16267n = 160  n = 2.38 or 3Substitute this value of n into the variables.66n + 2 = 1626(3) + 2 = 140= 20 3 emails were sent.20 emails were received
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3 years ago
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