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bezimeni [28]
2 years ago
15

HELP PLEASE!!!!!! Only 5 more minutes till i turn it in!!!

Mathematics
2 answers:
Stella [2.4K]2 years ago
7 0

Hi!

The <u>Triangle Angle Sum Theorem</u> states that the sum of the interior angles in all triangles will always be 180 degrees.

We can set up an equation with the given information:

40 + (2x - 30) + (x + 20) = 180

Remove parentheses:

40 + 2x - 30 + x + 20 = 180

Combine like terms:

30 + 3x = 180

Subtract 30 from both sides:

3x = 150

Divide both sides by 3:

x = 50

Now, the problem wants us to solve for angle B.

Angle B is (2x - 30) degrees. We know the value of x, so we just have to substitute:

(2x - 30)

(2(50) - 30)

100 - 30

70

<u><em>Therefore, angle B is 70 degrees.</em></u>

GarryVolchara [31]2 years ago
5 0

Answer:

<B = 70°

Step-by-step explanation:

First we need to find x, lets plugin these two equations.

2x - 30 = x + 20

Then find like terms

2x = x + 50 =

x = 50

Then we plugin 50 for x

2(50) - 30 =

100 - 30 = 70

<B = 70°

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We have two samples, A and B, so we need to construct a 2 Samp T Int using this formula:

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In order to use t*, we need to check conditions for using a t-distribution first.

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We need the <u>tail area </u>first.

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Next we need the <u>degree of freedom</u>.

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