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3 years ago

Ion 1(Multiple Choice Worth 2 points)

Mathematics

1 answer:

Alexxandr [17]3 years ago

4 0

Answer:

105.19.

Step-by-step explanation:

Area = 1/2 ac sin B

= 1/2 * 10 * 22 * sin 107

= 105.19..

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Find the measure of an angle whose supplement measures two times its measure

myrzilka [38]

Answer:

first angle = 60

second angle = 120

Step-by-step explanation:

Let the first angle x

Let the second angle = 2x

x + 2x = 180 Supplementary angles = 180 degrees

3x = 180 Divide by 3

3x/3 = 180/3

x = 60

2x = 120

7 0

3 years ago

Plz help me with this

Anastaziya [24]

Answer: average = 4

standard deviation = 0.38

<u>Step-by-step explanation:</u>

Average (aka Mean) = (4 + 3.5 + 4.5 + 4.2 + 3.8)/5 = 20/5 = 4

$\text{Standard Deviation = }\sqrt{\dfrac{1}{n-1}\sum(x-\overline{x})^2}\\\bullet n=5\\\bullet x=4\\\\\\SD=\sqrt{\dfrac{1}{5-1}[(4-4)^2+(4-3.5)^2+(4-4.2)^2+(4-3.8)^2]}\\\\\\.\quad =\sqrt{\dfrac{1}{4}[0+0.25+0.25+0.04+0.04]}\\\\\\.\quad =\sqrt{\dfrac{0.58}{4}}\\\\\\.\quad =0.38078$

8 0

3 years ago

In a class of 20 students ,40% are boys.25% of theboys and 50% of the girls were glasses.how many students were glassses. show w

Mice21 [21]

40% of 20 is 8 Boys
60% of 20 is 12 Girls
50% of the Girls is 6
25% of the Boys is 2
6 + 2 = 8 Students wore glasses

Hope this helps!

4 0

4 years ago

45-

belka [17]

Answer:

my answer is 18

follow me

4 0

4 years ago

Please help me it takes do long to do this please

Alexxandr [17]

Answer:

Step-by-step explanation:

a. (I) x = 65

(ii) vertically opposite angles are equal.

b. (i) 71 degrees

(ii) alternate interior angles are equal

c. (i) z = 180 - 71 = 109 degrees

(ii) angles on a line add up to 180 degrees

<h3>Hope this helps</h3>

6 0

3 years ago

Read 2 more answers