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elena-14-01-66 [18.8K]
3 years ago
10

1(4 – 22); 2 – 2x I don’t get this question can someone help me

Mathematics
1 answer:
sertanlavr [38]3 years ago
8 0

Answer:

i dont know if this is what u wanted but it wasn't really specified

Step-by-step explanation:

1(4 – 22); 2 – 2x

simplified:

−18;−2x+2

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At time t ≥ 0, the velocity of a body moving along the s-axis is v = t² -5t +4. When is the body moving backwards
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Answer:

A

Step-by-step explanation:

The velocity of a moving body is given by the equation:

v=t^2-5t+4 ,\, t\geq0

Is the velocity is <em>positive </em>(v>0), then our object will be moving <em>forwards</em>.

And if the velocity is negative (v<0), then our object will be moving <em>backwards</em>.

We want to find between which interval(s) is the object moving backwards. Hence, the second condition. Therefore:

v

By substitution:

t^2-5t+4

Solve. To do so, we can first solve for <em>t</em> and then test values. By factoring:

(t-4)(t-1)=0

Zero Product Property:

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Now, by testing values for t<1, 1<t<4, and t>4, we see that:

v(0)=4>0,\, v(2)=-20

So, the (only) interval for which <em>v</em> is <0 is the second interval: 1<t<4.

Hence, our answer is A.

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3 years ago
How are dot plots, bar graphs, and histograms used to analyze data?
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Answer:

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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 years ago
Read 2 more answers
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