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3 years ago

What’s the missing side length?

Mathematics

1 answer:

densk [106]3 years ago

5 0

Answer:

Step-by-step explanation:

Since all sides of a triange equal 180 degrees you would add up all the givin sides and subtract them by 180 and you would get your answer.

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In a standard deck of cards, what is the theoretical probability of drawing a diamond?

Inga [223]

1 in 4

4 suits, each with the same number of cards. 1/4 of the cards are diamonds, so theres a 1 in 4 chance of drawing one.

7 0

3 years ago

Read 2 more answers

A sample of 8 buttons is randomly selected and the following diameters are measured in inches. Give a point estimate for the pop

kenny6666 [7]

Answer:

$\bar X= \frac{1.83+1.85+1.79+1.73+1.69+1.74+1.76+1.70}{8}= 1.76125$

Now we can estimate the population variance with the sample variance given by:

$s^2 = \frac{\sum_{i=1}^n (x_i -\bar X)^2}{n-1}$

And replacing we got:

$s^2 = 0.0033839$

And the estimator for the population deviation $\sigma$ is given by :

$\hat \sigma = \sqrt{s^2}= \sqrt{0.0033839}= 0.058172$

Step-by-step explanation:

For this case we have the following data given:

1.83,1.85,1.79,1.73,1.69,1.74,1.76,1.70

First we need to calculate the mean with the following formula:

$\bar X= \frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X= \frac{1.83+1.85+1.79+1.73+1.69+1.74+1.76+1.70}{8}= 1.76125$

Now we can estimate the population variance with the sample variance given by:

$s^2 = \frac{\sum_{i=1}^n (x_i -\bar X)^2}{n-1}$

And replacing we got:

$s^2 = 0.0033839$

And the estimator for the population deviation $\sigma$ is given by :

$\hat \sigma = \sqrt{s^2}= \sqrt{0.0033839}= 0.058172$

7 0

4 years ago

What is the absolute deviation and range of the data set 134 139 145 152 174

malfutka [58]

The answer or range would be 40

6 0

3 years ago

What is the surface area of the regular pyramid given below?

yuradex [85]

For this case we have by definition, that the total surface area of a regular pyramid with a square base is given by:

$SA = \frac {1} {2} p * S + A_ {b}$

Where:

p: It is the perimeter of the base

S: It's the inclination

$A_ {b}:$ It is the area of the base

Substituting:

$A_ {b} = 7 ^ 2 = 49units ^ 2\\p = 7 + 7 + 7 + 7 = 28units\\S = 10units\\SA = \frac {1} {2} 28 * 10 + 49\\SA = 140 + 49\\SA = 189 \ units ^ 2$

ANswer:

Option B

3 0

4 years ago

In a high school, 2/5 of the girls make up 150 students.

poizon [28]

Answer:

375 girls

Step-by-step explanation:

Let the number of girls in the school be y.

Then, we can write the equation:

$\frac{2}{5} y = 150$

We can now solve for y by multiplying both sides by

$\frac{5}{2}$

$\frac{5}{2} \times \frac{2}{5} y = 150 \times \frac{5}{2}$

$\implies \: y = 75 \times 5$

$y = 375$

Therefore there are 375 girls in the school.

5 0

4 years ago