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Nadya [2.5K]
3 years ago
13

Math. I NEED HELP. PLZ. I don't understand!

Mathematics
1 answer:
tatyana61 [14]3 years ago
6 0

You plot the points and use the distance formula to find the length of the lines between the points. Distance formula: d=\sqrt{(}x_{2}  -x_{1} )^2 + (}y_{2}  -y_{1} )^2\\

Then use the pythagorean theorem with the sides, (C^2=A^2+B^2, c=longest side) if the equation works then it is a right triangle.

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3 years ago
Countering a cost $9.40 per sales tax. After sales tax, it cost $9.87. What is the sales tax rate?
Nady [450]
STEP 1:
find the sales tax (decimal form)

x= sales tax

Cost + (Cost * Sales Tax)= Total
plug in known numbers

$9.40 + ($9.40 * x)= $9.87

9.40 + 9.40x= 9.87
subtract 9.40 from both sides

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divide both sides by 9.40

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STEP 2:
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or move decimal to the right two decimal places

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ANSWER: The sales tax is 5% (or 0.05 in decimal form)

Hope this helps! :)
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