Solve the combined inequality and select the answer that best describes the graph of the solution.
2x + 8 < 10 or 3x - 3 > 12
Open dot at -1 shaded to the left, closed dot at 4 shaded to the right
Closed dot at -1 shaded to the left, closed dot at 5 shaded to the right
Closed dot at 1 shaded to the left, closed dot at 5 shaded to the right.
None of the above
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2x + 8 < 10
2x < 10 - 8
2x < 2
x < 1
3x - 3 > 12
3x > 12 + 3
3x > 15
x > 5
we know that it has to be open dots because there is no equal signs.
we know that x is smaller then 1 and bigger then 5.
can you figure the answer out with this information ?
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you know that it can't be the 2nd or 3rd one because it cannot have a closed dot. And there shouldn't be any dots on -1. So that just leaves one answer....none of the above.
By the way, what are you testing people for ? Are you trying to see how well they can explain the problem ?