3 years ago

Find the limit (if it exists). (If an answer does not exist, enter DNE.) lim x→(−1/2)+ 6x2 + x − 1 4x2 − 4x − 3

Mathematics

1 answer:

Evgesh-ka [11]3 years ago

5 0

You might be able to do direct substitution.

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The speed of boat in still water is 15km/hr if needs 4 more his to travel 63 km against the current of a river than it needs to

hram777 [196]

Answer:

$\frac{63}{15 - c} - \frac{63}{15 + c} = 4$

Step-by-step explanation:

The systems of equations are

Let us assume the rate of the current be c

Now actual speed against the current is (15 - c)

And, the actual speed with the current is (15 + c)

Here we applied the time formula i.e. distance by speed

Also the upstream time - downstream time = 4

Now the equations are

$\frac{63}{15 - c} - \frac{63}{15 + c} = 4$

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Given g(x)=-2x+3, solve for x when g(x)=-3

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Answer:

g(-3)=9

Step-by-step explanation:

Replace all of the (x) with -3

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g(-3)= -2(-3)+3

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g(-3)= 6+3

Simplify further

g(-3)= 9

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