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Leona [35]
3 years ago
15

Evaluate the expression |23-4| -21-71927​

Mathematics
1 answer:
Artemon [7]3 years ago
8 0

Answer: 19

Step-by-step explanation:

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Step-by-step explanation:

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2 years ago
Describe and correct the error in finding the measure of the angle
DerKrebs [107]

Sorry, it's late, and I'm a bad explainer.

The error is adding (2x-12) with x and 30. This is wrong because you are adding the angles inside the triangle and you are assuming that (2x - 12) is the unlabeled angle INSIDE the triangle, when it is the exterior angle/outside of the triangle.

A straight line is also 180°.

(2x - 12) + ? = 180

30 + x + ? = 180

If you look at the equations, and put parentheses around 30 + x, (30 + x) and (2x - 12) should be the SAME NUMBER. So you could set them equal to each other to find x. (or you could also look at the picture and see that they both need/are missing the same angle)

2x - 12 = 30 + x

x = 42

Now you plug 42 into the exterior angle equation

2(42) - 12 = 84 - 12 = 72°

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3 years ago
Find the radius of the circle. <br><br>6(x – 3)2 + 6(y + 7)2 = 216​
Fantom [35]

Answer:

radius=6

Step-by-step explanation:

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3 years ago
If the distance between A(0, 4) and B(3,a) is 5 units then find the value of a.​
Anna007 [38]

Answer:

Step-by-step explanation:

a = 0

So that AOB makes a right triangle with sides 3-4-5

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Read 2 more answers
Please help will mark brainliest if correct
Annette [7]

Answer:

umm

Step-by-step explanation:

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