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miv72 [106K]
3 years ago
10

The sales tax on a digital camera is $7.15. What is the sales tax rate?

Mathematics
1 answer:
torisob [31]3 years ago
8 0
You just have to find out the percent 7.15 is of 105.  To do that, you set up a proportion with x as the percentage:

\frac{7.15}{105}=\frac{x}{100}

Then, cross multiply to get:

\frac{7.15}{105}=\frac{x}{100}\\715=105x\\105x/105=715/105\\x=6.810

So, the sales tax rate was 6.8%.
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Find the sales tax for a lawnmower that cost 265.00 at a 6% tax rate?
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Step-by-step explanation:

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Answer:

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2 years ago
Select the correct answer.
Naddik [55]
You use the FOIL method, and how you do this is -

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Multiply the first x by both numbers in the second factor. Which means, you multiply x by x and 8, the two in (x + 8).

With this, you get -
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Then do the same thing with -7.

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Then combine the two.
x^2 + 8x - 7x - 56

Combine like terms.

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So now, 7 x 8 is 56
And -7 + 8 would be 1. And that is the value of “x” which is b in the form a^2x + bx + c.

Now with this, you take those two numbers and make the factors =
(x + 8) (x - 7)

Then you set these equal to 0.

x + 8 = 0

Subtract the 8 from both sides.

x = -8

————

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Add the 7 on both sides.

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Answer: A
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3 years ago
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Answer:

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2 years ago
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