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SOVA2 [1]
3 years ago
9

Find the difference.(2n - 9) - 5(-2.4n + 4) =​

Mathematics
1 answer:
MArishka [77]3 years ago
5 0

Answer:

14n - 29

Step-by-step explanation:

First you'd distribute in the parentheses by -5. -5 × -2.4n and -5 × 4 which you would get 12 and -20.

Then, bring everything down and combine like terms. 2n + 12n = 14n || -9 - 20 or -9 - (-20) = -29. 14n - 29 is the lowest you can simplify because you can subtract a variable and a constant together.

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A, B and C are collinear points. B is between A and C. AB=12 BC=18 AC=3x Find X.
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Answer:

x =10

Step-by-step explanation:

Given

AB = 12

BC = 18

AC = 3x

Required

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Since B is in between both points, then:

AC = AB + BC

This gives

3x = 12 + 18

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a student has answered 82% of the questions correctly in the examination. He made mistakes in 9 questions Calculate the toltal n
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Answer:

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Step-by-step explanation:

Let x = total questions in the exam

Since 82% of the test was scored correctly, that means 18% of the student's exam was scored incorrectly.

With this information we can write:

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Answer:

y = -5x-9

Step-by-step explanation:

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Divide each side by 2

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