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3 years ago

5+(−4)+(−7)+2 jijujuijuijuijujijuijuijuijiji

Mathematics

2 answers:

Maurinko [17]3 years ago

8 0

Combine the terms. Note that: one positive and one negative sign results in a negative sign.

Simplify: 5 + (-4) = 5 - 4 = 1

1 + (-7) = 1 - 7 = -6

-6 + 2 = -4

-4 is your answer

valentina_108 [34]3 years ago

8 0

5+(-4)+(-7)+2

1+(-7)+2

-6+2

-4

that is the answer

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Further Explanation:

We'll need to convert each given score to a corresponding standardized z score.

The formula to use is

z = (x - mu)/sigma

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Let's find the z score for the Care of Magical Creatures class

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And for the Transfiguration class as well

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The negative z score means his grade below the average, whereas earlier the other scores were above the average since he got positive z scores.

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To summarize, we have these z scores

Care of Magical Creatures: z = 0.333
Defense Against the Dark Arts: z = 0.583
Transfiguration: z = -0.263
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