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3 years ago

Helpppppppppppppp!!!!!

Mathematics

2 answers:

Yuri [45]3 years ago

7 0

Answer:

B 60

Step-by-step explanation:

Anna [14]3 years ago

4 0

Answer:

60°

Step-by-step explanation:

angle at a point is 360°

add your given angles and minus it from 360°

40°+105°+155°=300

360°-300°=60°

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Solve for f

oksano4ka [1.4K]

Answer:

f = 5/3

Step-by-step explanation:

3/4 f = 5/4

Multiply each side by 4/3 to isolate f

4/3 *3/4 f = 5/4 *4/3

f = 5/3

5 0

3 years ago

Read 2 more answers

Calculate the value of the sample variance. Round your answer to one decimal place. 9_5,9_5,2,9_5

Ugo [173]

Answer:

$s^2 = 0.01$

Step-by-step explanation:

Given

Values: 9/5, 9/5, 2, 9/5

Required

Calculate the sample variance

Sample variance is calculated using:

$s^2 = \frac{\sum (x_i - \overline x)^2}{n - 1}$

First, we calculate the mean

$\overline x = \frac{\sum x}{n}$

$\overline x = \frac{9/5 + 9/5 + 2 + 9/5}{4}$

$\overline x = \frac{7.4}{4}$

$\overline x = 1.85$

$s^2 = \frac{\sum (x_i - \overline x)^2}{n - 1}$ becomes

$s^2 = \frac{(9/5 - 1.85)^2+(9/5 - 1.85)^2+(2 - 1.85)^2+(9/5 - 1.85)^2}{4 - 1}$

$s^2 = \frac{(-0.05)^2+(-0.05)^2+(0.15)^2+(-0.05)^2}{4 - 1}$

$s^2 = \frac{0.0025+0.0025+0.0225+0.0025}{3}$

$s^2 = \frac{0.03}{3}$

$s^2 = 0.01$

<em>Hence, the variance is 0.01</em>

5 0

3 years ago

How do you find the area

AnnZ [28]

You first separate the triangle from the rectangle. Then multiply one side be one side.

7 0

4 years ago

A mathematics Teacher brought 40 expensive calculator at 16400 each and a number of cheaper calculator costing tshs 5900 each. S

Novay_Z [31]

Answer:

Step-by-step explanation:

First, let's find how much she spent on the expensive calculators

40 times $16400= $656,000

Now, lets find how much money she had for the cheap calculators.

$774,000- $656,000=$118000

Now that we have her budget (money remaining) for the cheaper calculators, lets divide that by the price for each individual calculator.

$118000/$5900=20

If you like my answer, please mark me as a brainliest! (I am new to this community.)

4 0

3 years ago

Mike has $600 in his bank account over the last five years the amount in his account has went down to $250 what integer represen

UkoKoshka [18]

600 ---> 250

600 - 250 = 350

350 / 5 = 70

Average decrease in value per year: $70

7 0

3 years ago