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e-lub [12.9K]
2 years ago
9

Sophie earned a grade of 72% on her multiple choice history final that had a total of 200 problems. How many problems on the fin

al exam did Sophie get wrong?
Mathematics
1 answer:
fiasKO [112]2 years ago
8 0

Answer:

56 questions.

Step-by-step explanation:

percent got wrong = 100% - percent got correct.

percent got correct = 72%

percent got wrong = 100%-72% = 28% or 0.28

questions got wrong = total questions * percent got wrong.

total questions = 200

questions got wrong = 200*0.28 = 56 questions

Therefore, Sophie got 56 questions wrong.

Hope this helps!

Please mark as brainliest!

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3 years ago
Q5: Identify the graph of the equation and write an equation of the translated or rotated graph in general form.
MAVERICK [17]

Answer:

d.\:ellipse;\:3x^2+y^2+6x-6y+3=0.

Step-by-step explanation:

The given conic has equation;

3x^2+y^2=9

Divide through by 9.

\Rightarrow \frac{3x^2}{9}+\frac{y^2}{9}=\frac{9}{9}

\Rightarrow \frac{x^2}{3}+\frac{y^2}{9}=1.

This is an ellipse centered at the origin;

This ellipse has been translated so that the center is now at;

(-1,3)

The translated ellipse has equation;

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Clear the fraction;

3(x+1)^2+(y-3)^2=9.

Expand;

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Write in general form;

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3x^2+y^2+6x-6y+3=0.

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3 years ago
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