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vlada-n [284]
3 years ago
14

If a point is reflected over the x-axis, the x-coordinate will not change. True False

Mathematics
2 answers:
leva [86]3 years ago
7 0
The answer is true because only the y coordinate will change. <span />
ss7ja [257]3 years ago
7 0
I think its False

Best of luck!!!!
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The GCD(a, b) = 9, the LCM(a, b)=378. Find the least possible value of a+b.
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\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:

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

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54, 63

whose sums are:

387
207
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117

So the least possible value of a+b is 117.
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