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USPshnik [31]
2 years ago
13

What is m _BEC OB) 70° OA) 65° OD) 120° OC) 50°

Mathematics
1 answer:
just olya [345]2 years ago
5 0

Answer:

C) 50°

Step-by-step explanation:

m\angle BEC= 180\degree-(65\degree+65\degree)

\implies m\angle BEC= 180\degree-130\degree

\implies m\angle BEC= 50\degree

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Last week Alexander was paid $56 for 7 hours of work. How much money does Alexander's job pay per hour?
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None of this makes sense
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7<br> Solve the equation x^2 - 8x + 15 = 0.
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Answer:

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Step-by-step explanation:

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What 2 numbers multiply to 15 and add to -8

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Write the following series in sigma notation.<br> 7 + 16 + 25 +34 +43 +52 + 61
Solnce55 [7]

The series 7 + 16 + 25 +34 +43 +52 + 61 is an illusration of arithmetic series

The sigma notation of the series is: \sum\limits^7_{n=1} {9n - 2}

<h3>How to write the series in sigma notation?</h3>

The series is given as:

7 + 16 + 25 +34 +43 +52 + 61

The above series is an arithmetic series, with the following parameters

  • First term, a = 7
  • Common difference, d = 9
  • Number of terms, n = 7

Start by calculating the nth term using:

a(n) = a + (n - 1) * d

This gives

a(n) = 7 + (n - 1) * 9

Evaluate the product

a(n) = 7  - 9 + 9n

Evaluate the difference

a(n) = 9n - 2

So, the sigma notation is:

\sum\limits^7_{n=1} {9n - 2}

Read more about arithmetic series at:

brainly.com/question/6561461

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2 years ago
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