There are about 0.62 miles in a kilometer. How many kilometers long is a 95-mile drive? Round your answer to the nearest tenth o
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Answer: Choice A
The two characteristics here are:
- The boundary line is a dashed line. This visually indicates to the reader "points on the boundary do NOT count as solutions". Think of the boundary as an electric fence you cannot touch, but can get closer and closer to. We aren't including boundary points directly because of the lack of "or equal to".
- The shading is above the boundary, due to the "greater than" sign. This only works if we have y isolated.
The graph of choice B is since we have a solid line and shading below the solid line. This time points on the boundary are part of the solution set.
For this case we have a factored expression, of a second degree equation:
(
To find the solutions:
we add 3 to both sides of the equation:
We subtract 8 on both sides of the equation:
Thus, the solutions of the equation are:
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