3 years ago

What is the value of x? _________ *

1 answer:

Flura [38]3 years ago

7 0

Look at the picture.

The angle y° and 71° are Supplementary Angles. Therefore y° + 71° = 180°.

$y^o=180^o-71^o=109^o$

The sum of measures of these three angles of any triangle is invariably equal to 180°.

Therefore we have the equation:

$x^o+109^o+28^o=180^o\\\\x^o+137^o=180^o\ \ \ |-137^o\\\\x^o=43^o$

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icang [17]

You could make it true by making it (8x10) plus (8x1)

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4 years ago

Zanzabum

Answer:

$\sigma=547.1125$

Step-by-step explanation:

-The margin of error is calculated using the formula:

$ME=z_{\alpha/2}\times \frac{\sigma}{\sqrt{n}}\\\\$

-We substitute the values, n=900 and ME=30 in the formula to solve for standard deviation:

$ME=z_{\alpha/2}\times \frac{\sigma}{\sqrt{n}}\\\\\\30=1.645\times\frac{\sigma}{\sqrt{900}}\\\\\sigma=\frac{30^2}{1.645}\\\\=547.1125$

Hence, the population standard deviation is 547.1125

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4 years ago

Elenna [48]

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Mamont248 [21]

100 x .4 = 40

40 x 12 = 480

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2 years ago

elena-s [515]

The axis of symmetry in a parabola is a line that's vertical that divides into 2 congruent halves.

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4 years ago