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andreyandreev [35.5K]
3 years ago
9

A line with a slope of -2 passes through the point (4,7).

Mathematics
1 answer:
dusya [7]3 years ago
5 0

Answer:

y-7 = -2 (x-4)

Step-by-step explanation:

Point Slope Form:

y-y_{1} = m(x-x_{1} ), where m is the slope of the line

They tell you that the line has a slope of -2, so that will go in the first yellow box.  They also tell you that the line passes through the point (4, 7), so those are the values for x1 and y1.  They've already filled in y1 with 7, so x1 (which is 4) will go in the second yellow box

y-7 = -2 (x-4)

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K is the midpoint of JL JK=3x-1 and KL=2x+8 find JL
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Answer:

JL = 52

Step-by-step explanation:

It is given in the question that K is the midpoint of JL.

So, JK = KL ......... (1)

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3 years ago
Suppose that the dollar cost of producing x radios is c(x) = 400 + 20x - 0.2x 2. Find the marginal cost when 30 radios are produ
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Marginal cost is how much it would cost to make one MORE of the same product so now we find how much it costs to produce 31 radios and compare the two. 

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Now we find the difference which means we subtract the two. 

828 - 820 = 8. 

Your marginal cost is $8. 

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820 - 812 = 8. 
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