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Ne4ueva [31]
3 years ago
11

Two towns, Ancaster and Dundas, are 4 km and 6 km, respectively, from an old railroad line that has been made into a bike trail.

Points C and D on the trail are the closest points to the two towns respectively. These points are 8 km apart. Where a rest stop should be built to minimize the length of a new trail that must be built from both towns to the rest stop? 
Mathematics
1 answer:
serg [7]3 years ago
8 0
Okay, so first you draw a picture and let x be the distance from point D to the rest stop. Then the distance from point  to the rest stop is  8 - x

You know that the length of the new trail is y + z, where y is the distance from Ancaster to the rest stop and z is the distance from Dundas to the rest stop. 

Now by the Pythagorean theorem,  y^2 = 4^2 + x^2 and  z^2 = 6^2 + (8 - x) ^2

So take square roots of these, add them, and minimize. 

Note: I am assuming the path is perfectly straight, otherwise this approach fails.
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What is the solution to the system of equations below? x 3 y = 15 and 4 x 2 y = 30 (6, 3) (3, 6) (7, –6) (–6, 7).
swat32

Answer: (6 , 3)

Step-by-step explanation: Given

x + 3y =15 ------- equation 1

4x + 2y = 30 --------- equation 2

x = 15 - 3y

Put value of x in equation 2

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-10y = -30

divide by '-10' on both sides

y = 3

now, put value of y in equation 1

x + 3(3) = 15

x + 9 = 15

x = 15 - 9

x =  6

So , (x , y) = (6 , 3)

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2 years ago
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3 years ago
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saveliy_v [14]
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Monte owned stock in Hadley Corporation which paid an annual dividend of $5.15 per share. If the closing price per share was $52
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8 0
2 years ago
Please help me out on this question
Mariulka [41]

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Hope that helps. Let me know if you have any questions.

7 0
3 years ago
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