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2 years ago

Elimination method - -4x = 4y 4x - 8y = 12

Mathematics

1 answer:

nika2105 [10]2 years ago

6 0

Answer: (4,-4)

y=-4, x=4

Step-by-step explanation:

-4x=4y

4x-8y=12

-8y=-4x+12 Now I can substitute -4x for 4y

-8y=4y+12

-2y=y+12

-3y=12

y=-4

-4x=4y

-4x=4(-4)

x=4

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Let
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y------> the elevation of the roller coaster
c------> the incline of a roller coaster

we know that
applying the Pythagoras theorem
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c=2y-----> equation 2
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substitute equation 2 and equation 3 in equation 1
[2y]²=(11+y)²+y²
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using a graph tool-----> to resolve the second order equation
see the attached figure

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