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PtichkaEL [24]
3 years ago
5

A math club took a math test. Twelve of the members had an average score of 80. Eighteen of the members had an average score of

86. What was the class average? Enter your answer in the box.
( )
Mathematics
2 answers:
Annette [7]3 years ago
7 0
31 I believe that is the correct answer
lisabon 2012 [21]3 years ago
6 0
The class average was like i think 83 or 84
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Answer:

  x = -9

Step-by-step explanation:

Segment NL is twice the length of midsegment WV.

  2WV = NL

  2(x+15) = x+21

  2x +30 = x +21 . . . . simplify

  x = -9 . . . . . . . . . . . . add -30-x

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<em>Additional comment</em>

This value of x means the other segments are ...

  MN = 12

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2 years ago
Reabilwe is conducting an experiment in which the temperature is measured carefully. The temperature was 106°C at the end of the
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The formula to calculate the temperature (T) after m minutes is -

T = 106 - 6m

We have Reabilwe who is conducting an experiment in which the temperature is measured carefully. The temperature was 106°C at the end of the first minute, and then it falls by 6°C every minute after that.

We have to tp determine a formula to calculate the temperature (T) after m minutes.

<h3 /><h3>Starting from x, if the bacteria count rises by 5 every second, then determine the formula to calculate the bacteria count after 30 seconds.</h3>

Initial count = x

Count increasing per second = 5

Assume that the bacteria count after t seconds is y. Then -

y = x + 5t

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According to question, we have -

Initial Temperature = 106 degrees Celsius

Temperature increase per minute = 6 degrees Celsius

Assume that the Temperature fall after m minutes is T. Then -

T = 106 - 6m

Hence, formula to calculate the temperature (T) after m minutes is -

T = 106 - 6m

To solve more questions on Equation Modelling, visit the link below -

brainly.com/question/20876878

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5 0
1 year ago
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Adam had 9 sections in his art project.
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Solve the system of equations.<br> ​7x−3y=20<br> y=5x−4<br> ​ x= <br> y=
Rama09 [41]

Answer:

{x,y} = {-1,-9}  

Step-by-step explanation:

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