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sergiy2304 [10]
2 years ago
8

In a test (+5) marks are given for every correct answer and (-2) marks are given for every incorrect answer. Smitha answered all

questions and scored (-15) marks though he got 3 correct answers. How many incorrect answer had she attempted?
Any one help I will mark u as BRAINLIEST ANSWER if u help me plssssss! I will not accept wrong answer pls
Mathematics
1 answer:
Ymorist [56]2 years ago
6 0

Answer:

15 answers

Step-by-step explanation:

To solve this question we need to set up an equation.

Let's name the number of incorrect answers x.

<u>We can set up an equation that's essentially:</u>

(Points for correct answer)*(number of correct answers)+(points for incorrect answer)*(number of incorrect answers)=final score

When we plug in our numbers and variables it looks like this:

5(3)+(-2x)=-15

Simplify

15-2x=-15

Subtract 15 from both sides

-2x=-30

Divide both sides by -2

x=15

This means Smitha attempted 15 wrong answers, and that there were 18 questions in total.

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Step-by-step explanation:

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The summer after sophomore year, Haley nannied for a family and earned $2000. She
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3 years ago
The cost of a large flat screen tv is decreasing 20% per year.
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Read 2 more answers
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