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4 years ago

Plz solve it.......

1 answer:

8 0

The area of the triangle = 1/2 * base * altitude = 1.2 * 20 * a = 10a

Work out the altitude (a):-

the altitude forms a right angled triangle with vertex angle = 1/2*108 = 54

so tan 54 = 10 / a

a = 10 / tan 54 = 7.265

area of the triangle = 10 * 7.265 = 72.65 cm^2

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Points Y and Z are the same distance from point X on a number line. The coordinate of point X is –7 and the coordinate of point

Mars2501 [29]

Since you know that point Y and point Z are equal distance form point F, you will need to know the distance between point Y, -1, and the distance between point X, -7. So, the total distance, after subtracting -1 from -7, is -6. So, you will then subtract another -6 from -7, to get -13, which is the coordinate of point Z.

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3 years ago

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PLEASE HELP!! <br>A line is rotated. Which of these could be the result?

motikmotik

Answer:

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3 years ago

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Find the least common multiple of 16-8y and, (y-2)^2

Veronika [31]

Answer:

16-8y

=8 (2-y)

(y-2)^2

${y}^{2} - 4y + 4$

Hope it helps you make me brainliest plz

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2 years ago

a set of average city temperatures in december are normally distributed with a mean of 16.3°C and a standard deviation of 2°C. w

koban [17]

Answer:

19.74% of temperatures are between 12.9°C and 14.9°C

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

$\mu = 16.3, \sigma = 2$

What proportion of temperatures are between 12.9°C and 14.9°C?

This is the pvalue of Z when X = 14.9 subtracted by the pvalue of Z when X = 12.9.

X = 14.9

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{14.9 - 16.3}{2}$

$Z = -0.7$

$Z = -0.7$ has a pvalue of 0.2420

X = 12.9

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{12.9 - 16.3}{2}$

$Z = -1.7$

$Z = -1.7$ has a pvalue of 0.0446

0.2420 - 0.0446 = 0.1974

19.74% of temperatures are between 12.9°C and 14.9°C

3 0

3 years ago

The digit to the right of 1.249 is

givi [52]

Are you looking for the name of the place value? If you are the answer is ten thousands. If that isn’t what you’re looking for, I need more information.

7 0

3 years ago