2 years ago

How to solve 4x - 9 = 7x + 12

Mathematics

1 answer:

krek1111 [17]2 years ago

8 0

I hope this helps you

7x-4x = -9-12

3x=-21

x= -7

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Complete question:

A coin is biased such that a head is three times as likely to occur as a tail. Find the expected number of tails when this coin is tossed twice.

Answer:

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Step-by-step explanation:

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Hence,

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{HH, HH, HH, HH, HH, HH, HH, HH, HH, HT, HT, HT, HT, HT, HT, TT}

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Answer:

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HERE,

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$\tt{8x=160 }$ ⠀

$\tt{x=\dfrac{160}{20} }$ ⠀

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