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3 years ago

Simplify the expression: -3(3 – 06y)

Mathematics

2 answers:

Alchen [17]3 years ago

8 0

Answer:

18y−9

Step-by-step explanation:

kow [346]3 years ago

6 0

Answer:

-9 - (-18y)

simplified more answer : -9 + 18y

if the 06 is a decimal then: answer: -9 - (-1.8y)

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4 years ago

4(3+2x) + 2 = 46 , solve for x I need help I'm a bit confused

Reil [10]

Answer:

x=4

Step-by-step explanation:

4(3+2x)+2=46

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A random sample of five Galaxy 8 smartphones is selected from the production line after final assembly, and the result of the we

zepelin [54]

<h2>Answer with explanation:</h2>

Given : A random sample of five Galaxy 8 smartphones is selected from the production line after final assembly, and the result of the weight control measurement is (in grams) are :

X= 155.1, 154.8, 155.5, 155.3, and 154.6.

here, n=5

The average weight : $\overline{x}=\dfrac{\sum^{i=5}_{i=1}x_i}{n}$

$=\dfrac{155.1+154.8+155.5+155.3+154.6}{5}\\\\=\dfrac{775.3}{5}=155.06$

∴ Average weight ( $\overline{x}$ )=155.06 grams

Uncertainty = Standard deviation: $\sigma=\sqrt{\dfrac{\sum^{i=5}_{i=1}(x_i-\overline{x})^2}{n}}$

$=\sqrt{\dfrac{(0.04)^2+(-0.26)^2+(0.44)^2+(0.24)^2+(-0.46)^2}{5}}$

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i.e. Its uncertainty : $\sigma=0.33$

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3 years ago

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