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MrMuchimi
2 years ago
5

What is the angle of angle x

Mathematics
1 answer:
Serhud [2]2 years ago
6 0
Hi there,

your question is asking for the angle of the central circle, and the formula is: the two arcs' sum divided by 2

So,

(60 + 40) ÷ 2 = 50

The answer is 50°

Hope I helped :p
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astra-53 [7]

Step-by-step explanation:

  • 1

vector AB(3-(-6); 5-7)

vector AB(9;-2)

AB= \sqrt{9^{2}+(-2)^{2}  } = \sqrt{85}

  • 2

M is the midpoint of AB

we have B(-5;10) and M(1;7)

let A(x;y)

(x-5)/2 = 1 ⇒ x-5 = 2⇒ x = 7

(10=y)/2 = 7⇒ 10+y = 14 ⇒y= 4

so : A(7;4)

  • 3

the center of the circle is the midponit of the line joining both ends of the diameter

let A(x;y) be the other end

(-2+x)/2 = 2 ⇒ -2+x = 4⇒ x= 6

(5=y) = -1 ⇒ 5+y = -2 ⇒ y= -7

so the coordinates of the other end are (6; -7)

  • 4

A,B and C are collinear such as AB=BC so b is the midpoint of AC

(-5+1)/2 = y ⇒ y = -4/2 ⇒ y = -2

((-3=x)/2 = 7 ⇒ -3+x = 14 ⇒ x = 17

so x= 17 and y = -2

7 0
2 years ago
In an inductive generalization, in order to achieve an error margin of plus or minus 3 percentage points at a confidence level o
ANTONII [103]
Let n =  required random sample size.

Assume that the population standard deviation is known as σ.
Let m =  sample mean.
At the 95% confidence level, the expected range is
(m - k(σ/√n), m + k(σ/√n))
where k = 1.96.

Therefore the error margin is 1.96(σ/√n).
Because the error margin is specified as 3% or 0.03, therefore
(1.96σ)/√n = 0.03
√n = (1.96σ)/0.03
n = 128.05σ²

This means that the sample size is about 128 times the population variance.

Answer:
Smallest sample size = 128.05σ², where σ = population standard deviation.
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3 years ago
At McDonalds,a cheeseburger has 200 fewer calories than a large fries.Two cheeseburgers and a large fries have 1100 calories.How
garik1379 [7]
The fries are 500 calories and each burger is 300 calories. 500+300+300=1100
8 0
3 years ago
Multiple. 7i (4-2i)
Eddi Din [679]

Answer:

14+28i

Step-by-step explanation:

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I need to know the answer to question 10
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The answer is actually e although it would have been a

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