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serious [3.7K]
3 years ago
14

The sum of 3x^2 + 4x -2 and

Mathematics
1 answer:
HACTEHA [7]3 years ago
4 0

Answer:4x2 -x + 1

Step-by-step explanation:

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After sales tax, a $600 antique clock costs $642. What is the sales tax percentage?
LenKa [72]

well, clearly the tax is the added 42 bucks, so hmmm if we take 600 to be the 100%, how much is 42 off of it in percentage?

\begin{array}{ccll} amount&\%\\ \cline{1-2} 600 & 100\\ 42& x \end{array} \implies \cfrac{600}{42}=\cfrac{100}{x}\implies \cfrac{100}{7}=\cfrac{100}{x} \\\\\\ 100x=700\implies x=\cfrac{700}{100}\implies x=7

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What is the midpoint of a line segment with the endpoints (8 -3) and (-5 -9)
Nadya [2.5K]

Answer:

(1.5, -6)

Step-by-step explanation:

To find the x coordinate of the midpoint

(x1+x2)/2 = (8+-5)/2 = 3/2 = 1.5

To find the y coordinate of the midpoint

(y1+y2)/2 = (-3+-9)/2 = -12/2 = -6

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3 years ago
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Find the value of x. Round to the nearest tenth.
goblinko [34]

Answer:

19.7

Step-by-step explanation:

37-17.3=19.7 which would be the value of x

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The points A(12,7), B(12,-3), C(-2,-3), and D(-2,7) form rectangle ABCD. Which point is halfway between A and B?
katrin2010 [14]
To find the answer, you must find the midpoint of their x-coordinates and their y-coordinates. To do that, you take the average between their x and y-coordinates.
So, in this case, it is:
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y: (7-3)/2 = 4/2 = 2

So, the answer is: (12,2)
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3 years ago
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