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inna [77]
4 years ago
7

I don’t know how to use elimination without getting decimals when I divide to get like x’s or y’s

Mathematics
1 answer:
Dvinal [7]4 years ago
6 0
The answer is ‘y=30’

i don’t really know how to explain it but multiply the first top number’-4x’ with all of the bottom numbers. Multiply the first number at the bottom ‘-10’ by all the numbers at the top.

-40x-20y=-140
-40x+28y=-100
-
____________
-8y=240
— ——
-8 -8

y=30
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Probability that detector B goes off is '0.615'

Step-by-step explanation:

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Assuming that

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Thus the probability that detector A goes off and detector B does not go off is  product of the individual probabilities

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