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Sveta_85 [38]
3 years ago
11

At a high school the average grade for the first semester for all subjects was 79.3. Based on this mean , the principal conclude

s that half of the grades were 79.3. Higher is her conclusion justified? Why or why not?
Mathematics
1 answer:
svet-max [94.6K]3 years ago
4 0

Answer:

That is incorrect. It would be appropriate if the median were 79.3, since the median is the value in the middle (when placing the data in order).

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Step-by-step explanation:

−2x+5y=−15 and 5x+2y=−6

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Step: Solve−2x+5y=−15for x:

−2x+5y=−15

−2x+5y+−5y=−15+−5y(Add -5y to both sides)

−2x=−5y−15

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5x+2y=−6

5(52y+152)+2y=−6

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292y+752+−752=−6+−752(Add (-75)/2 to both sides)

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y=−3

Step: Substitute−3foryinx=52y+152:

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