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Vesnalui [34]
3 years ago
7

Explain how they got the answer. Calculus I

Mathematics
1 answer:
rewona [7]3 years ago
6 0

Answer:

They did it exactly how it is set out

Step-by-step explanation:

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Determine the standard form of the equation of the line that passes through ( -5,0 ) ( 0 ,-9)
insens350 [35]

The general form for a line through two points (a,b) and (c,d) is

(c-a)(y-b)=(d-b)(x-a)

This is better than the slope forms because it works in the no slope case, as does the standard form.

If you haven't seen it before, it works because when (x,y)=(a,b) we get (c-a)(b-b)=(d-b)(a-a), both sides zero, and when (x,y)=(c,d) we get (c-a)(d-b)=(d-b)(c-a), clearly equal sides.

Here we have

(0 - -5)(y - 0) = (-9 - 0)(x - - 5)

5y = -9(x+5)

5y = -9x - 45

9x + 5y = -45

Ironically there are two standards for standard form; one with the constant alone on the right and one with the whole thing equal to zero.  I like the constant alone.

Answer: 9x + 5y = -45

Check:

We check each point is on the line

(-5,0)

9(-5) + 5(0) = -45, good

(0, -9)

9(0) + 5(-9) = -45, good again


5 0
3 years ago
Read 2 more answers
Et aussi surtout : (4-√2)(4+√2)
elena-14-01-66 [18.8K]

Answer:

8

Step-by-step explanation:

J'espère que cela t'aides! si c'est le cas, puis-je avoir un brainliest ?

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Use the formula D= RT to solve the problem. Mrs. Warren traveled 1,069 miles from Vian, OK to Raleigh NC at an average rate of 6
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The answer is C!!!!!!!!!!!!!!!!!!
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Which shows the use of a credit card
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C is what you do when credit cards are involved.
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