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3 years ago

11

What is a reasonable estimate for 7 3/4 times 2 2/3

1 answer:

Hoochie [10]3 years ago

4 0

Answer: A estimated answer would be 15 an exact answer would probably be maybe 15 1/4 I think.

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4 years ago

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bazaltina [42]

$\displaystyle |\Omega|=\binom{8}{3}=\dfrac{8!}{3!5!}=\dfrac{6\cdot7\cdot8}{2\cdot3}=56\\ |A|=5\cdot\binom{3}{2}=5\cdot3=15\\\\ P(A)=\dfrac{15}{56}\approx27\%$

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3 years ago

Fiesta28 [93]

Answer:

let inverse f(x) be m:

$m = \frac{1}{2x + 1} \\ 2x + 1 = \frac{1}{m} \\ 2x = \frac{1 - m}{m} \\ x = \frac{1 - m}{2m}$

substitute x in place of m:

${ \bf{ {f}^{ - 1}(x) = \frac{1 - x}{2x } }}$

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3 years ago