Graphing question easy! HELP!
2 answers:
Answer:
The answer to your question is below
Step-by-step explanation:
First, determine the kind of lines.
The Pink line must be dotted because of the "≤" sign.
The Yellow line must be dotted because of the ">" sign.
Then, choose the shaded areas
For the pink line, we need the lower part.
For the yellow line, we need the right part
Choose the area where both areas cross.
It is the lower and right area.
See the picture below
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Answer:
A
Step-by-step explanation:
The velocity of a moving body is given by the equation:
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:
By substitution:
Solve. To do so, we can first solve for <em>t</em> and then test values. By factoring:
Zero Product Property:
Now, by testing values for t<1, 1<t<4, and t>4, we see that:
So, the (only) interval for which <em>v</em> is <0 is the second interval: 1<t<4.
Hence, our answer is A.