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3 years ago

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Mathematics

1 answer:

Anastaziya [24]3 years ago

8 0

Answer:

x=142

Step-by-step explanation:

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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

katovenus [111]

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>

3 0

3 years ago

Need help please and Thank you

Novosadov [1.4K]

Top left:
7x-44 = 4x+4
7x-4x = 4+44
3x = 48
x = 16
8y-43 = 39+(7(16)-44)
8y = 39+68+43
8y = 150
y = 18.75

7 0

3 years ago

Someone who is good with algebra i equations and inequalities?

guajiro [1.7K]

Somebody? I think you can find someone like that in your school... nice profile picture.

5 0

3 years ago

Can someone plz help me

Pani-rosa [81]

Answer:

I got 172.05

Step-by-step explanation:

I used a calculator on goo gle calculatorsoup.com

5 0

3 years ago

:)Which number line best shows how to solve -4 -(-6)?

Readme [11.4K]

Answer:

i dont see a # line..

Step-by-step explanation:

hmm hmm

6 0

3 years ago

*click image*

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