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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.
( )

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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Are the answers 200 cm and 1052 cm? Please help!

grin007 [14]

Check the picture below.

so hmmm let's find the distance AC, which is the only one missing for the perimeter.

$\textit{using the pythagorean theorem} \\\\ c^2=a^2+b^2\implies c=\sqrt{a^2 + b^2} \qquad \begin{cases} c=\stackrel{hypotenuse}{AC}\\ a=\stackrel{adjacent}{6}\\ b=\stackrel{opposite}{8}\\ \end{cases} \implies AC=\sqrt{6^2 + 8^2} \\\\\\ AC=\sqrt{100}\implies AC=10~\hfill \underset{Perimeter}{\stackrel{6~~ + ~~8~~ + ~~10}{\text{\LARGE 24}cm}} \\\\[-0.35em] ~\dotfill$

$\textit{area of a triangle}\\\\ A=\cfrac{1}{2}bh \begin{cases} b=base\\ h=height\\[-0.5em] \hrulefill\\ b=6\\ h=8 \end{cases}\implies A=\cfrac{1}{2}(6)(8)\implies A=\text{\LARGE 24}~cm^2$

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1 year ago

The quality assurance department of a chair factory samples daily production to test for the strength of the chairs being produc

Thepotemich [5.8K]

This is one of those statistical follow-up questions and had to look for the options. Since the department of quality assurance is assessing the durability of the chairs being produced, the population that they are testing for quality is ALL THE CHAIRS THEY PRODUCED. Hope this helps.

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3 years ago

Read 2 more answers

Which set is closed under the operation multiplication?

barxatty [35]

A because 1×2 is 2 than 2×2 is 4

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3 years ago

I am confused on this question.....please help!

asambeis [7]

Answer:

Todd.

Step-by-step explanation:

The equation has no solutions because negative 2 ≠ 4

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3 years ago

Help me please !! give me right answer .

harina [27]

Answer:

2.04

Step-by-step explanation:

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3 years ago