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Yakvenalex [24]
3 years ago
5

What is the first step in silving this equation? 3n - 4 = -2 + 2n

Mathematics
2 answers:
Pie3 years ago
6 0

Answer:

3n - 4 =  - 2 + 2n \\  or \: 3n - 2n =  - 2 + 4 \\ or \: n \: =  + 2 \\ or \: n = 2 \\ therefore \: n = 2

<h3>The Answer of this question is 2.</h3>

Thank you ☺️ ☺️

Cloud [144]3 years ago
4 0

Steps:

3n - 4 = -2 + 2n

-2n              -2n

n - 4 = -2

   +4    +4

n = 2

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3 years ago
A truck weighing 150kN and travelling at 2m/sec impacts with a buffer
FrozenT [24]

The maximum compression of the spring is 0.276 m

Step-by-step explanation:

First of all, we calculate the spring  constant of the spring, by using Hooke's law:

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When the truck impacts with the spring, all the kinetic energy of the truck is converted into elastic potential energy of the spring, so we can write

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k=8\cdot 10^5 N/m is the spring constant

x is the compression of the spring

The mass of the truck can be found from its weight:

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So now we can re-arrange eq.(1) to find the compression, x:

x=\sqrt{\frac{mv^2}{k}}=\sqrt{\frac{(15,290)(2)^2}{8\cdot 10^5}}=0.276 m

Learn more about kinetic energy:

brainly.com/question/6536722

#LearnwithBrainly

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