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Brut [27]
3 years ago
11

Plss help me do this o-o

Mathematics
2 answers:
Vinvika [58]3 years ago
4 0

Answer:

x=\sqrt6\\y=\sqrt{12}

Step-by-step explanation:

We know that since angles in a triangle add up to 180º, the remaining angle must be 45º.

So the side with length x must be equal to the side with length \sqrt6. That is:

x=\sqrt6

Now, by Pythagoras:

y=\sqrt{(\sqrt6)^2+(\sqrt6)^2}\\=\sqrt{6+6}\\=\sqrt{12}

S_A_V [24]3 years ago
3 0

Answer:

x=\sqrt{6}

y=2\sqrt{3}

Step-by-step explanation:

Sum of the interior angles of a triangle = 180°

So the missing angle = 180 - 45 - 90 = 45°

Therefore, as two of the interior angles are congruent (both 45°), this is an isosceles triangle.  This means that the two shorter sides are equal,

so x=\sqrt{6}

Use Pythagoras' Theorem to calculate y:

y=\sqrt{(\sqrt{6})^2+(\sqrt{6})^2 } =\sqrt{12} =2\sqrt{3}

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A card is drawn from a standard deck of 52 playing cards. Find the probability that the card is a black card given that it is an
Pavlova-9 [17]

probability of getting black card an ace =2/52=1/26

5 0
3 years ago
Student enrollment at a local school is concerning the community because the number of students has dropped to 504, which is a 2
Trava [24]

Answer: The student enrollment the previous year was 630.

Step-by-step explanation: What we have currently is 504 students which represents 80 percent of the previous total number of students. We can conclude this because the question states clearly that the student enrollment dropped by 20 percent. In other words, we need to add back 20 percent to 80 percent to get the total 100 percent student enrollment from the previous year. The total number of students can be derived as follows;

If 504 equals 80 percent or (0.8), then 504 divided by 4 gives us 20 percent or (0.2)

20 percent times 5 equals 100 percent (or 0.2 times 5 equals 1)

Hence the calculation becomes;

(504/4) x 5 = Total

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Therefore the total number of students enrollment the previous year was 630.

3 0
3 years ago
Find the area of the shaded region.
Anvisha [2.4K]

Answer:

73.4 cm^2

Step-by-step explanation:

The equation is :

πr^2

Substitute the radius in:

π(5)^2

Solve:

Area of full circle = 25π

(Note : leave this answer in terms of 'pi' so it is easier to handle

Next, find the area of the sector

The equation for this is:

(angle/360) x πr^2

Substitute the values in:

(80/360) x π(5)^2

Solve :

Area of sector = (50/9)π

Now, find the area of the triangle:

1/2 absinC

Substitute the values in:

1/2(5)(5) x sin(80) = 12.31009691

Subtract this answer from the area of the sector

Answer = 5.14319607

Subtract this from the area of the whole circle

Answer = 73.39662073

To the nearest tenth, that would be 73.4 cm^2

Mark brainliest pls

3 0
3 years ago
Gummi bears come in twelve flavors, and you have one of each flavor. Suppose you split your gummi bears among three people (Adam
aliina [53]

Step-by-step explanation:

From the given gummi bear, the chance that Adam is selected for any draw is 1/3 as well as the chance he is not selected at any draw is 2/3.

a). The probability of Adam getting exactly three gummi bears = P(Adam gets selected at 3 draws and not selected at the remaining 9 draws)

= $ (\frac{1}{3})^3 (\frac{2}{3})^9 = \frac{2^9}{3^{12}} $

Now, the 3 draws where Adam gets selected can be any 3 out of 12 draws in $ {\overset{12}C}_3 $ = 220

Thus, probability of Adam getting three gummi bears = $ 220 \times \frac{2^9}{3^{12}} $

                                                                                                = 0.21186

b). Probability that Adam will get the three gummi bears given each person will received at the most 1 gummi bear

= P(of the remaining 9 draws after assigning one gummi bear to each one, Adam gets selected at 2 draws and not selected at 7 draws) = $ {\overset{9}C}_2 (\frac{1}{3})^2 (\frac{2}{3})^7 $

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d). Let Y = Number of the gummi bears that Adam will get, given each person will received at the most 1 gummi bear Then, Y = number of draws Adam gets selected in the remaining 9 draws and Y ~ B(9, 1/3). So, the expected number of bears that Adam gets given each person received at least 1 gummi bear

= 1 + mean of B(9, 1/3) = 4

e). When every one gets atleast one gummi bear, the new sample size will be 9 and so we can say that there is a reduction in variance.

8 0
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