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Mandarinka [93]
3 years ago
12

Please help find the missing angle measures

Mathematics
2 answers:
masya89 [10]3 years ago
7 0

Answer:

127

Step-by-step explanation:

(n-2)180

(5-2)180

=540 for total angle

540-90(3)-143

=127

denpristay [2]3 years ago
7 0
Answer:127
pentagon angles all together are always 540 degrees.
Hence,
90+90+90+143+x=540
x= 540-413
x=127
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iogann1982 [59]

Answer:

I think this is the correct solution

8 0
3 years ago
WILL GIVE BRAINLIEST find the equation of the axis of symmetry for the parabola y= -x^2-5x
timama [110]

Answer:

The axis of symmetry is -\frac{5}{2}.

  1. Check the degree of your polynomial
  2. Plug your numbers into the axis of symmetry formula
  3. Write down the equation of the axis of symmetry

Please Mark Brainliest If This Helped!

6 0
2 years ago
Witch is bigger<br><br> 1/4 <br> or<br> 2/7
Kaylis [27]

Answer:

2/7

Step-by-step explanation:

this is because you can simply do the butterfly method and multiply 4 times 2 which is 8 for 2/7 and 7 times 1 for 1/4 which is 7 so 2/7 is greater than 1/4

3 0
3 years ago
第 5 个问题 a multiple choice exam has 10 questions. each question has 3 possible answers, of which one is correct. a student knows
tatuchka [14]

The chances that the student was merely guessing is 1/3.

Bayes Theorem determines the conditional probability of an event A given that event B has already occurred.

denoted by

P(A/B)=\frac{P(A)*P(B/A)}{P(B)}

let A be the  event that the student knows the answer .

B be  the  event that the student does not knows the answer .

and

E be the event he gets answer correct .

According to the given question

P(A)=\frac{4}{10} \\\\ P(B)=1-\frac{4}{10} =\frac{6}{10}

Probability that the answer is correct ,given that he knows the answer is

P(E/A)=1

Probability that the answer is correct ,given that he guesses it is

P(E/B)=\frac{1}{3}   [as the MCQ has 3 options and only one is correct]

We need to find the probability that he guesses the answer given that it is correct.

Required probability P(B/E)=\frac{P(B)*P(E/B)}{P(A)*P(E/A)+P(B)*P(E/B)}

Substituting the values we get

P(B/E)=\frac{\frac{6}{10} *\frac{1}{3} }{\frac{4}{10} *1+\frac{6}{10} *\frac{1}{3} }

=\frac{6}{30}*\frac{30}{18}  \\ \\ =\frac{6}{18} \\ \\ =\frac{1}{3}

Therefore ,  the chances that the student was merely guessing is 1/3.

Learn more about Probability here brainly.com/question/13140147

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8 0
1 year ago
Can someone please do this please.
Finger [1]

Answer:

72°

Step-by-step explanation:

tan x= PN/OP=95/31

⇒x ≈ 72°

7 0
3 years ago
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