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3 years ago

Help???????? Please??

Mathematics

1 answer:

densk [106]3 years ago

7 0

Hey there!
In order to see if it's a function or not, it can't have the same x value twice, or it just has to pass the vertical line test.
This means that you could put a vertical line anywhere and it would not pass between two points.
If we look, we could indeed try the vertical line test, and and there would be no intersection between two points.
Additionally, we also do not have any repeating x values on this quadratic function's parabola.
Hope this helps!

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Answer:

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Step-by-step explanation:

See the figure to understand the proof :

Let A Triangle ABC with sides a,b,c,

Draw a perpendicular on base AC of height H meet at point D

Divide base length b as AD = x -b and CD = x

By Pythagoras Theorem

In Triangle BDC And In Triangle BDA

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From above eq 1 and 2

c² = (a² - x²) + x² + b² - 2xb

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∴ x= a cos C

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3 years ago

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Tasya [4]

What you're looking at in this image are two alternate exterior angles.

Alternate exterior angles, are, essentially, exterior angles of a transversal that runs through two parallel lines. These angles are on alternating sides. These angles, assuming the lines are parallel, must be equal.

There's a proof behind why these angles are equal, but I won't bore you with the specifics as the question doesn't require it.

So - we know that these two angles must be equal to prove that the lines A and B are parallel. Knowing this, we can write an equation:

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<u>Subtract 20 from both sides:</u>

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<u>Subtract 3x from both sides:</u>

5x - 3x = 3x - 3x + 40

2x = 40

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If you have any questions on how I got to the answer, just ask!

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Answer/Step-by-step explanation:

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Thus:

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