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seraphim [82]
3 years ago
11

If y = -4 when x = 10, find y when x = 2

Mathematics
1 answer:
Goshia [24]3 years ago
4 0

Answer:

y=-8/10 when x=2

Step-by-step explanation:

make a proportion

-4/10=y/2

cross multiply and simplify to solve the proportion

-8=10y

y=-8/10

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We can use the sum of an aritmetic sequence
the sum from n=1 to n=r when the first term is a1 and the nth term is an is
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so the sum is S=\frac{100(1+100)}{2}
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fun fact, gauss (famous math guy) did this when he was younger, legend has it that he was assigned this as an in class assigment to kill time but gauss found a neat pattern, he noticed that adding the end terms wer giving the same sum, example, 100+1=101, 2+99=101, etc, so he just needed to find al the pairs and add them all up




answer is 505
the result is 505
5 0
3 years ago
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