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Nookie1986 [14]
3 years ago
6

Solve: 12^x2+5x-4 = 12^2x+6 x=2x = -5x=2x=-5no solution​

Mathematics
1 answer:
omeli [17]3 years ago
6 0

Answer:

x=2

Step-by-step explanation:

12x^2+5x-4 = 12x^2+6

Subtract 12x^2 from each side

12^x2-12x^2+5x-4 = 12^2x-12x^2+6

5x-4 = 6

Add 4 to each side

5x-4+4 = 6+4

5x = 10

Divide each side by 5

5x/5 = 10/5

x = 2

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A boat travels 12 km upstream and back in 1 hour 45 minutes. If the speed of the current is 3 km/h throughout, find the speed of
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Answer:

14.3 km/h   to 3 significant figures

Step-by-step explanation:

Let time travelling upstream be t1 hours and downstream = t2 hours.

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12 / t1 = v - 3.........................(2)

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From (1) and (3) , substituting for t2:-

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Subtract:-   (2) - (4):-

12 / t1 - 12 / (1.75 - t1) = -6

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3 0
3 years ago
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kondor19780726 [428]
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PolarNik [594]

Answer:

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4 0
3 years ago
Read 2 more answers
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