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kobusy [5.1K]
2 years ago
12

Which of the following is not always true?

Mathematics
1 answer:
miss Akunina [59]2 years ago
5 0

Answer:

All obtuse angles are congruent ⇒ False

Step-by-step explanation:

Vertical angles and alternate interior angles are always congruent. All right angles, by definition, are equal to 90 degrees and therefore must be congruent. Obtuse angles are angles between 90 and 180 degrees. Therefore, not all obtuse angles are congruent.

Example: 127° and 163° are both obtuse but clearly not congruent.

⇒Answer choice 4

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Which equation represents the relationship between the angles in the figure?
Svetach [21]

The options are;

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B) 90 + c = 180

C) b + c = 180

D) 42 + b = 150

Answer:

C) b + c = 180

Step-by-step explanation:

From angle theorems, we know that sum of angles on a straight line is 180°

Now, c and 42° form a straight line.

Thus;

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c = 180 - 42

c = 138°

Similarly b and c form a straight line and so;

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3 years ago
The probability that a morning bus arrives on time is 65%.
Drupady [299]

The attached diagram represents the tree diagram for three consecutive mornings.

<h3>How to draw the tree diagram?</h3>

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P(On Time) = 65%

Assume that the bus would definitely show up.

Then it means that the event is a binomial event and the possible outcomes are:

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Total = 2³

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This means that the tree diagram would have 8 outcomes

Next, we draw the tree diagram (see attachment)

Read more about tree diagrams at:

brainly.com/question/9178814

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7 0
2 years ago
I will give brainliest if you sub and stay subbed to JD Outdoors &amp; Gaming​
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Answer:

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Step-by-step explanation:

8 0
3 years ago
What are the zeros of the function f(x) = x4 − 4x2 − 5?
Gekata [30.6K]

Answer:

A graph shows zeros to be ±3. Factoring those out leaves the quadratic

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The function has roots -3, 3, 2-i, 2+i.

Step-by-step explanation:

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2 years ago
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True or false 9 &gt; d, if d = 3
Talja [164]

Answer:

true

Step-by-step explanation:

The left side  9 is greater than the right side 3, which means that the given statement is always true.

3 0
3 years ago
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