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3 years ago

Explain please. . . . . . . . . . . . .

Mathematics

2 answers:

masha68 [24]3 years ago

6 0

The answer would be <

olga nikolaevna [1]3 years ago

3 0

Since x=2, 11x is 11×2

11×2=22
22-2=20

x + 7 is 2+7

2+7=9

your answer is 20>9

hope this helps

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

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Answer:

20 questions

Step-by-step explanation:

Given

$Correct \Marks= +5$

$Incorrect\ Marks= -2$

$Score\ Obtained = 30$

$Number\ of\ correct\ answers = 10$

Required

Number of questions answered

First, we need to get the total correct marks obtained by Roy

This is calculated by multiplying the correct marks by number of correct answers

$Total = +5 * 10$

$Total = +50\ marks$

Subtract this from the total scores obtained; This gives the total incorrect answer obtained by Roy

$Incorrect = Scores\ Obtained - Total$

$Incorrect = 30 - (+50)$

Open bracket

$Incorrect = 30 - 50$

$Incorrect = -20$

Divide this by -2 to get the number of incorrect answers

$Incorrect\ Answers = \frac{-20}{-2}$

$Incorrect\ Answers = 10$

Add this to the number of correct answers to give the total number of question answered

$Total = Correct\ Answers + Incorrect\ Answers$

$Total = 10 + 10$

$Total = 20$

<em>Hence, Roy answered a total of 20 questions</em>

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