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zhuklara [117]
4 years ago
15

Help? >K12<

Mathematics
1 answer:
weqwewe [10]4 years ago
3 0
The correct answer is a) Amy's solutions are correct.

Since she wanted the intersection point of the equations, she had to set them equal.  Once she did she had

x²+3x-5=4x+1

Gathering the variables on one side of the equation, she subtracted 4x from each side:
x²+3x-5-4x=4x+1-4x
x²-x-5=1

Quadratics should be equal to 0 when we solve them, so she subtracted 1 from each side:
x²-x-5-1=1-1
x²-x-6=0

She then factored her expression; factors of -6 that sum to -1 are -3 and 2:
(x-3)(x+2)=0

Using the zero product property we know that either x-3=0 or x+2=0; therefore x=3 or x=-2.
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If possible, choose k so that the following function is continuous on any interval:
Alexxx [7]
We need to cancel out the discontinuity in x = 4

In order to do that, factorize the numerator:
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and the two parentheses cancel out, leaving
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which at x = 4 gives:
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5 0
3 years ago
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nika2105 [10]
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3 years ago
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A pair of runners leaves the same starting point at the same time. The angle between the runners paths is 85 degrees. They stop
goldfiish [28.3K]

Answer:

136.34 m  to the nearest hundredth.

Step-by-step explanation:

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We need to find the third side.

We can use the Cosine Rule to do this:

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x^2 - 22.6616 x - 15500 = 0

x =  [22.6616 +/- sqrt ((-22.6616)^2 - 4 * -15500) ]  / 2

x= 136.34 m.

5 0
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only thr converse is valid.

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4 years ago
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The surface area is 1,872 square inches. 
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