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Kaylis [27]
2 years ago
12

Given the function h(x)=-4+6, Find the value of h(-2)

Mathematics
1 answer:
valina [46]2 years ago
4 0

h(x) = -4 + 6

h(x) = 2

h(-2) = 2 because It's a constant function, when you substitute any x-values, you still get the same y-value.

Even if you substitute x = 1000, you still get y = 2.

Therefore, h(-2) = 2

-----------

If you mean h(x) = -4x+6

then h(-2) = 8+6 = 14

therefore, h(-2) = 14 for h(x) = -4x+6

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Answer:

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Step-by-step explanation:

Let speed of boat in still water be = x\ ms^{-1}

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We know that,

\textrm{Time spent rowing down stream =Time spent rowing up stream}

So,

\frac{2400}{x+10}=\frac{400}{x-10}

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Dividing both sides by 400

\frac{2400(x-10)}{400}=\frac{400(x+10)}{400}

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Adding 60 to both sides.

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Subtracting both sides by x

6x-x=x+70-x

5x=70

Dividing both sides by 5.

\frac{5x}{5}=\frac{70}{5}

∴ x=14

Speed of boat in still water =14\ ms^-1

Time spent rowing down stream =\frac{2400}{14+10}=\frac{2400}{24}=100\ s

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