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Scrat [10]
3 years ago
9

8.4 km/min into km/h​

Mathematics
1 answer:
Lisa [10]3 years ago
6 0

Answer:

504km/h

Step-by-step explanation:

there are 60 minutes in an hour.

8.4kmx60min= 504km/h

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8. Solve the system using elimination.<br> 3x - 4y = 9<br> - 3x + 2y = 9
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Answer:

3x−4y=9 −3x+2y=9

Add these equations to eliminate x: −2y=18

Then solve−2y=18

for y: −2y=18 −2y −2 = 18 −2 (Divide both sides by -2)

y=−9

Now that we've found y let's plug it back in to solve for x.

Write down an original equation: 3x−4y=9

Substitute−9for y in 3x−4y=9: 3x−(4)(−9)=9

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Answer: x=−9 and y=−9

Hope This Helps!!!

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y = c1 cos(5x) + c2 sin(5x) is a two-parameter family of solutions of the second-order DE y'' + 25y = 0. If possible, find a sol
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Answer:

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Step-by-step explanation:

Given the solution to the differential equation y'' + 25y = 0 to be

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y(x) = c1cos5x + c2sin5x

y'(x) = -5c1sin5x + 5c2cos5x

If y'(π) = 9, this means when x = π, y'(x) = 9

On substituting;

9 = -5c1sin5π + 5c2cos5π

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The final expression gives the required solution to the differential equation.

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