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V125BC [204]
3 years ago
10

If f(x)=3(x+5)+4/x what is f(a+2) ?

Mathematics
1 answer:
dimaraw [331]3 years ago
7 0

f(x)=3(x+5)+\dfrac{4}{x}\\\\f(a+2)\to\text{put x = a + 2 to the equation of the function f}\\\\f(a+2)=3(a+2+5)+\dfrac{4}{a+2}=3(a+7)+\dfrac{4}{a+2}

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sveta [45]

Answer:

She was wrong in her analysis because the sales discount of 25% is the discount on the original cost of the dress and not the purchasing cost of the dress as explained below:

Step-by-step explanation:

From the question:

Purchasing cost price of the dress = £30

However, this cost (£30) was after a 25% Sales Discount        

It, therefore, implies that £30 is equal to 75% of the cost price

75% of the original cost price  = £30

100% of the original cost price = (30 x100%)/75%

   Original cost price                 = £40

Therefore the 25% discount / savings on the cost

                                                     = £ (40-30)

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She saved £10 by buying the dress at £30 instead of the original cost of £40                                        

                                           

6 0
3 years ago
a container of coffee is 1/6 full.The container contains 2/3 of a pound of coffee.write division expression that represents the
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Answer:

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Step-by-step explanation:

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It means \frac{1}{6} f of container contain  \frac{2}{3}  pound coffee

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Step-by-step explanation:

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Step-by-step explanation:

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