3 years ago

What is the value? -8 * 2/3

Mathematics

1 answer:

Slav-nsk [51]3 years ago

6 0

Answer: -5 2/3

Step-by-step explanation:

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Solve the system of equations 3x = 84 - 2y 9x = 8y - 24

Eduardwww [97]

Answer:

$3x = 84 - 2y - - - (i) \\ 9x = 8y - 24 - - - - (ii) \\ from \: (ii) \\ 3(3x) = 8y - 24 \\ but \: from \: (i) \: \: 3x = 84 - 2y \\ hence \: put \: (i) \: in \: (ii) \\ 3(84 - 2y) = 8y - 24 \\ 252 - 6y = 8y - 24 \\ 276 = 14y \\ y = \frac{138}{7} \\ x = \frac{104}{7}$

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3 years ago

How to find all real solutions

AlladinOne [14]

$\bf \sqrt{\sqrt{x-5}+x}=5\leftarrow \textit{squaring both sides}
\\\\
\sqrt{x-5}+x=25\implies \sqrt{x-5}=25-x\leftarrow \textit{squaring both sides}
\\\\
x-5=(25-x)^2\implies x-5=625-50x+x^2
\\\\
0=x^2-51x+630\implies 0=(x-30)(x-21)$

and surely you'd know what the roots are

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3 years ago

The freezing point of water is 32 f. Tim added potassium and found out that the freezing point went down by 8 f what was the fre

sattari [20]

24 degrees Fahrenheit

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3 years ago

I don't know how to simplify

In-s [12.5K]

(5-2/x)/4-3/x^2

after simplifying these
(5x-2)/x(4x^2-3)/x^2
x(5x-2)/(4x^2-3)
5x^2-2x/4x^2-3

now u can solve it

6 0

3 years ago