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-BARSIC- [3]
3 years ago
9

Find the mean of this data set: {– 78, -12, 3, – 44}

Mathematics
1 answer:
blagie [28]3 years ago
5 0

Answer:

<u>Answer</u><u>:</u><u> </u><u>A</u><u>.</u><u> </u><u>-</u><u>3</u><u>2</u><u>.</u><u>7</u><u>5</u>

\dashrightarrow{ \tt{mean =  \frac{ \sum f(n)}{n} }} \\

• f(n) are the values of the set

• n is the number of items

\dashrightarrow \: { \tt{mean =  \frac{ - 78 + ( - 12) + 3 + ( - 44)}{4} }} \\  \\  \dashrightarrow \: { \tt{ \frac{ - 131}{4} }} \\  \\  \dashrightarrow \: { \boxed{ \tt{mean =  - 32.75}}}

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Step-by-step explanation:

The formula of the area of a trapezoid is A=\frac{1}{2}(b_{1}+b_{2})h , where:

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∴ 1\frac{1}{4} feet = 1\frac{1}{4} × 12 = 15 inches

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Learn more:

You can learn more about the area of figures in brainly.com/question/12919591

#LearnwithBrainly

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