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3 years ago

I need to know how to solve this and the answer

Mathematics

2 answers:

Gemiola [76]3 years ago

8 0

Answer:

69°

Step-by-step explanation:

180 - 21 -90 = 69

hope this helps...

N76 [4]3 years ago

8 0

Answer: The missing angle is 69°

Step-by-step explanation: When all the angles have their vertex on a straight line, they must add up to 180° They are "supplementary" angles.

The "box" in the corner of an angle is a symbol for "right angle" so that is a way to have a "given" 90°

Knowing that, you can add the "given" 90° + 21° to get 111°

Subtract 111° from 180° to find Angle a:

180 - 111 = 69

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Which properties does not belong with the other three?

Oksi-84 [34.3K]

Hi there!

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I believe your answer is:

$x - 6 = 5$

»»————-　★　————-««

Here’s why:

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I am assuming that '3=x divided by 3' is supposed to be $3 = \frac{x}{3}$ .

⸻⸻⸻⸻

The first, second, and fourth equations have x divided by a number. To isolate x, we would have to use the multiplication property of equality.

⸻⸻⸻⸻

For the third one ( $x-6=5$ ), the variable 'x' is being subtracted by 6. We would have to use the addition property of equality to isolate x.

⸻⸻⸻⸻

»»————-　★　————-««

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3 years ago

Please help! I will mark as brainliest. <3

Andrew [12]

<h2>Solving Inequalities</h2><h3>Answer:</h3>

$(-\infty,-8]$

<h3>Step-by-step explanation:</h3>

$-2x +7 \geqslant 23 \\ -2x +7 -7 \geqslant 23 -7 \\ -2x \geqslant 16 \\ \frac{-2x}{-2} \leqslant \frac{16}{-2} \\ x \leqslant -8$

The values of $x$ has to be less than or equal to $8$ so $x \in (-\infty,-8]$

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3 years ago

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Fittoniya [83]

Answer:

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Step-by-step explanation:

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3 years ago

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Basile [38]

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3 years ago