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3 years ago

10

Help me with the question below

2 answers:

OLEGan [10]3 years ago

3 0

Answer:

122

Step-by-step explanation:

a^2 + b^2 = c^2

(only in right angled triangles)

finlep [7]3 years ago

3 0

Answer:

122

Step-by-step explanation:

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Kellen's boat travels 15 mph. find the rate of the river current if she can travel 2 mi upstream in the same amount of time she

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If the speed of the stream is x
Time is given by d/r , where r is the rate and d is the distance;
Rate for upstream = (15-x) mph and that of down stream is (15 +x) mph
The time taken will be the same;
Thus; 2/(15-x) = 4/(15+x)
cross multiplying;
30 +2x = 60 -4x
6x = 30
x =5
Therefore the rate of the river is 5 mph

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ikadub [295]

We have been given a system of nonlinear equations.

$\\y=40x^{2},y=19x+3$

In order to solve this system we can first equate the two equations in order to get a quadratic in x.

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Our next step is to bring all the terms on one side.

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Upon setting each of these factors equal to zero using zero product property we get

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Upon solving both these equations we get

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Now we can substitute these values of x in the equation

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