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faust18 [17]
2 years ago
11

In a class test, (2) marks are given for every correct answers and (-1) marks for every

Mathematics
1 answer:
emmasim [6.3K]2 years ago
6 0

Using a system of equations, it is found that she attempted two questions incorrectly.

<h3>What is a system of equations?</h3>

A system of equations is when two or more variables are related, and equations are built to find the values of each variable.

In this question, the variables are:

  • Variable x: Number of questions attempted correctly.
  • Variable y: Number of questions attempted incorrectly.

Sreya scored 30 marks, with 16 correct questions, hence, considering the amount of points for each question, we have that:

2x - y = 30.

Since x = 16:

32 - y = 30

y = 2.

She attempted two questions incorrectly.

More can be learned about a system of equations at brainly.com/question/24372153

#SPJ1

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