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Nostrana [21]
3 years ago
14

a student answers 90% of the questions on a math exam correctly. if he answers 27 questions correctly how many questions are on

the exam?
Mathematics
1 answer:
kodGreya [7K]3 years ago
6 0

Answer:

30

Step-by-step explanation:

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Hey There!

The answer to your problem is x=-3 or x=-4 both answers are correct!

<u>Step 1: Subtract x²+12 from both sides.</u>

−7x−(x²+12)=x²+12−(x²+12)

−x²−7x−12=0

<u>Step 2: Factor left side of equation.</u>

(-x-3)(x+4)=0

<u>Step 3: Set factors equal to 0.</u>

-x-3=0 or x+4=0

<u>Get your answer:</u>

x=-3 or x=-4

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