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4 years ago

14-12x+39x-18x=256-60x-657x

Mathematics

1 answer:

emmasim [6.3K]4 years ago

4 0

Answer:

$\boxed{\bold{x=\frac{1}{3}}}$

Step-by-step explanation:

Combine Similar Elements: $\bold{-12x+39x-18x=9x}$

$\bold{14+9x=256-60x-657x}$

Combine Similar Elements: $\bold{-60x-657x=-717x}$

$\bold{14+9x=256-717x}$

Subtract 14 From Both Sides

$\bold{14+9x-14=256-717x-14}$

Simplify

$\bold{9x=-717x+242}$

Add $\bold{717x}$ To Both Sides

$\bold{9x+717x=-717x+242+717x}$

Simplify

$\bold{726x=242}$

Divide Both Sides By $\bold{726}$

$\bold{\frac{726x}{726}=\frac{242}{726}}$

Simplify

$\bold{x=\frac{1}{3}}$

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Step-by-step explanation:

a) Mean = (17 + 11 + 15 + 14 + 16)/5 = 14.6

Standard deviation = √(summation(x - mean)²/n

n = 5

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3 years ago

14-12x+39x-18x=256-60x-657x​

14-12x+39x-18x=256-60x-657x