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4 years ago

PLEASE HELP

Mathematics

2 answers:

mario62 [17]4 years ago

8 0

Answer:

(2.05x)+6

Step-by-step explanation:

x would be the miles and you multiply that by your fare per mile and add the 6 dollar tip

adell [148]4 years ago

4 0

Answer:

The taxi fare was $2.10 per mile, and she gave the driver a tip of $5. Ann paid a total of $49.10.

49.10 = 2.10(x) + 5

44.10 = 2.10(x)

x = 21 miles

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velikii [3]

They're vertical angles so equal to each other so do 2x+3=3x+7

2x+3=3x+7
-3 -3
-----------------
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answer is
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kirill115 [55]

Answer:

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Step-by-step explanation:

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arsen [322]

We know that $\overline{x}=8$ so:

$\overline{x}=8\\\\\\\dfrac{\sum\limits_{k=1}^7\,x_k}{7}=8\qquad|\cdot7\\\\\\ \boxed{\sum\limits_{k=1}^7\,x_k=56}$

We want to calculate:

$\sum\limits_{k=1}^7\,\big(2x_k-3\big)^2=\sum\limits_{k=1}^7\,\big(4x_k^2-12x_k+9\big)=\\\\\\=\sum\limits_{k=1}^7\,4x_k^2-\sum\limits_{k=1}^7\,\big12x_k+\sum\limits_{k=1}^7\,9=4\sum\limits_{k=1}^7\,x_k^2-12\sum\limits_{k=1}^7\,x_k+\sum\limits_{k=1}^7\,9=\\\\\\=4\cdot672-12\cdot56+7\cdot9=2688-672+63=\boxed{2079}$

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3 years ago