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sergeinik [125]
3 years ago
12

Seven times a number is 5600. what is the number?

Mathematics
2 answers:
dlinn [17]3 years ago
8 0
<span>Seven times a number is 5600. what is the number?
the </span>number is 800 because 5600/7= 800 so 7 times 800 is 5600
Vika [28.1K]3 years ago
5 0
To do this you need to work backwards. if you note the number as 'n' you can put
 7n = 5600
to find n you simply divide both sides by 7 getting
n = 5600/7 
n = 800
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vekshin1

Answer:

(a) l = -w + 21

(b) Domain: 0 <em>(See attachment for graph)</em>

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Step-by-step explanation:

Given

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Solving (a): A function; l in terms of w

All we need to do is make l the subject in 2(l + w) = 42

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Solving (b): The graph

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Since l and w are the dimensions of the fence, they can't be less than 1

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--------------------------------------------------------------------------------------------------

To check this

When w = 1

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--------------------------------------------------------------------------------------------------

<em>See attachment for graph</em>

<em></em>

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l = -w + 21 becomes

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