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morpeh [17]
3 years ago
8

I need to know what number goes here? HELP!

Mathematics
1 answer:
Anit [1.1K]3 years ago
3 0

Answer:

9

Step-by-step explanation:

cross multiply 7/63 by 1/x

so, multiply 7 by x and 63 by 1

you get 63=7x

divide by 7 on both sides and you get 9

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5(x-3) = 2(x+3) solve for x
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Answer:

7

Step-by-step explanation:

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

5x - 15 = 2x + 6                    

    + 15         + 15                     Switch sides to the liked terms

5x = 2x + 6 + 15

-2x  -2x                                   Switch sides to the liked terms

5x - 2x = 6 + 15  

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4 0
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A publisher requires 2⁄3 of a page of advertisements for every 5 pages in a magazine. If a magazine has 98 pages, to the nearest
rjkz [21]

Let x be the number of pages of advertisements.

Write a proportion from the table:

\dfrac{2}{3} of a page of advertisment - 5 pages in a magazine

x pages of advertisment - 98 pages in a magazine,

then

\dfrac{\dfrac{2}{3}}{x}=\dfrac{5}{98}.

Find x:

x=\dfrac{\dfrac{2}{3}\cdot 98}{5}=\dfrac{196}{15}=13\dfrac{1}{13}.

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A calculator can help
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White raven [17]

Answer:

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Step-by-step explanation:

If △XPS ≅△DNF, their corresponding sides would be congruent. This implies that:

XP ≅ DN

PS ≅ NF

XS ≅ DF

Given that:

XP = 4y - 3

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NF = 51

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DF = 54

Therefore:

XP = DN

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Add 3 to both sides

4y = 57 + 3

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Subtract 3 from each side

17x = 54 - 3

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