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2 years ago

Find the values of x and y?

Mathematics

2 answers:

Andrew [12]2 years ago

5 0

Answer:

x=20, y=70

Step-by-step explanation:

∠40°+∠adjacent to it =180°

∠adjacent= 180-40=140°

we see that 2 of the sides of one of the small triangles are congruent so that triangle is isoscel so the base angles are congruent as well

because sum of angles in a triangle has to be 180,

140 +x+x=180 so x=20°

from the right triange we see thhat y +90+20 =180 because sum of angle in a triangle has to be 180 so y=70

lakkis [162]2 years ago

4 0

Answer:x=20 y=70

Step-by-step explanation:

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3 years ago

The value of V8 is between which two integers?<br> 7 and 9<br> 49 and 81<br> 2 and 3<br> 3 and 4

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$\sqrt{4} < \sqrt{8} < \sqrt{9}$

Thus :

$2 < \sqrt{8} < 3$

So √8 is between 2 and 3 ,

Which means option three is the correct answer.

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2 years ago

While playing Monopoly, Robin estimated the probabilities of the non-zero rents according to the following probability distribut

azamat

Answer:

Step-by-step explanation:

Given the data table :

x : __ $2_ $14_ _$20 __ $100

P(x) : 0.40_ 0.20 _0.20 _0.20

The mean :

E(x) = Σ(x*p(x))

E(x) = (2*0.4) + (14*0.2) + (20*0.2) + (100*0.2)

E(x) = 27.6

The standard deviation :

SD(x) = sqrt(Σ(x² * p(x)) - E(x)²)

Σ(x² * p(x)) - E(x)² :

((2^2*0.4) + (14^2*0.2) + (20^2*0.2) + (100^2*0.2)) - 27.6^2

2120.8 - 761.76

= 1359.04

Sqrt(1359.04)

SD(x) = 36.865159

SD(x) = 36.87

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3 years ago