3 years ago

??????????????????????

Mathematics

1 answer:

AVprozaik [17]3 years ago

4 0

Idk what that answer is but good luck

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Puzzle <br>If a + b = 76<br>a - b = 38<br>a / b = ????????????

iogann1982 [59]

$+\left\{\begin{array}{ccc}a+b=76\\a-b=38\end{array}\right\\-----------\\.\ \ \ \ \ \ \ 2a=114\ \ \ \ \ |:2\\.\ \ \ \ \ \ \ \ \ \ a=57\\\\57+b=76\\b=76-57\\b=19\\\\\frac{a}{b}=\frac{57}{19}=\fbox{3}$

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3 years ago

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anzhelika [568]

Answer:

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Step-by-step explanation:

Sum of geometric sequence formula is

$S = a(\frac{1 -r^n}{1-r} )\\a=-1, r=6/(-1)=-6, n=7\\\\S = -1(\frac{1 -(-6)^7}{1-(-6)} )= -\frac{279937}{7} = -39991$

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Ksivusya [100]

<ABC = 1/2(82+44)
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answer
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