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Lerok [7]
3 years ago
13

Please help with my math due soon

Mathematics
1 answer:
MaRussiya [10]3 years ago
4 0

Answer:

x=2 y=6

Step-by-step explanation:

Using the substitution method 3x=9x-12 then combine like -6x=-12 then divide by -6 and x=2 then plug x=2 into any equation for example the bottom one. y=3(2) which y equal 6

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Assume that random guesses are made for eight multiple choice questions on an SAT test, so that there are n= 8 trials, each with
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0.80589

Step-by-step explanation:

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The combination formula is: ! / (!(−)!)

So the n would always =8, and the r would be 0,1,2,3. So you would have to calculate it for 0,1,2,3 Separately. This can be done by hand or you can use a simple combinations calculator online.

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0.19765

For 2;

The combination is 28

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0.296475

For 3;

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0.254122

All that’s left is to add these four numbers;

0.057647 + 0.19765 + 0.296475 + 0.254122 = 0.80589

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3 years ago
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