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2 years ago

How to solve 2s-4=16

Mathematics

2 answers:

Firdavs [7]2 years ago

5 0

2s - 4 = 16

Add 4 to both sides

2s = 20

Divide both sides by 2

s = 10

laiz [17]2 years ago

4 0

If you switch it around, it becomes: 16 + 4 = 2s

16 + 4 = 20

20 = 2s

20 ÷ 2 = 10

s = 10

Hope this helps :)

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2 years ago

Given the position of the particle, what the position(s) of the particle when it’s at rest

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The position function of a particle is given by:

$X\mleft(t\mright)=\frac{2}{3}t^3-\frac{9}{2}t^2-18t$

The velocity function is the derivative of the position:

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Substituting:

$\begin{gathered} t=\frac{9\pm\sqrt[]{81-4(2)(-18)}}{2(2)} \\ t=\frac{9\pm\sqrt[]{81+144}}{4} \\ t=\frac{9\pm\sqrt[]{225}}{4} \\ t=\frac{9\pm15}{4} \end{gathered}$

We have two possible answers:

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We only accept the positive answer because the time cannot be negative.

Now calculate the position for t = 6:

$undefined$

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so total is $30.44

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2 years ago

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