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yan [13]
3 years ago
15

if you have a test average of 92 and a standard deviation of 1.8, you generally do well on test. true or false

Mathematics
1 answer:
jeka57 [31]3 years ago
3 0
By most standards yes
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The GCD(a, b) = 9, the LCM(a, b)=378. Find the least possible value of a+b.
denis-greek [22]
\mathrm{gcd}(a,b)=9\implies9\mid a\text{ and }9\mid b\implies9\mid a+b

which means there is some integer k for which a+b=9k.


Because 9\mid a and 9\mid b, there are integers n_1,n_2 such that a=9n_1 and b=9n_2, and


\mathrm{lcm}(a,b)=\mathrm{lcm}(9n_1,9n_2)=9\mathrm{lcm}(n_1,n_2)=378\implies\mathrm{lcm}(n_1,n_2)=42

We have 42=2\cdot3\cdot7, which means there are four possible choices of n_1,n_2:

1, 42
2, 21
3, 14
6, 7

which is to say there are also four corresponding choices for a,b:

9, 378
18, 189
27, 126
54, 63

whose sums are:

387
207
153
117

So the least possible value of a+b is 117.
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34=2x+8(x+3)<br><br><br> Help me solve please?
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<em><u>x = 1</u></em>
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What is the domain of this function?<br> (5, 14)<br> (0,5)<br> (-20, 18)<br> (7, 7)
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The linear function in the graph shows the population of Greeville in the years since 2010.
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