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soldi70 [24.7K]
3 years ago
12

I dont the know the answer to c-d=b for c

Mathematics
1 answer:
Vinvika [58]3 years ago
4 0
C-d=b add to both sides d and will get 

c-d+d=b+d

c=b+d

hope helped 
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Step-by-step explanation:

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Ephraim took a friend for a birthday dinner. The total bill for dinner was $30.29 (including tax and a tip). If Ephraim paid a 2
notka56 [123]

Answer:

x= 30.29 (1-0.223) = 23.54

Ephraim paid a 22.3% tip, what was his bill before adding the tip?

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Step-by-step explanation:

For this case we assume the following notation:

T= 30.29 represent the total paid for the dinner

x represent the amount before adding the tip

f =0.223 represent the fraction of the total amount destined to the tip

Based on this we can create the following relationship between T and x:

T = f*T + (1-f)T = f*T + x

And we can solve for x from the previous equation like this:

x = T - f*T

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And if we add the two values we see that:

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Ephraim paid a 22.3% tip, what was his bill before adding the tip?

23.54

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kramer

Answer:

B. f(x)

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Step-by-step explanation:

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