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aleksandrvk [35]
4 years ago
11

If f(x) = 2x - 9, which of the following are correct?

Mathematics
1 answer:
matrenka [14]4 years ago
3 0
F(-1) = -11
f(0) = -9
f(3) = -3
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10 < –2b or 2b + 3 > 11
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<span>10 < –2b or 2b + 3 > 11 represents 2 different sets of numbers.

</span><span>10 < –2b can be reduced by dividing both sides by -2; you must then reverse the direction of the < sign:  -5 > b, which is the interval b < -5:  (-infinity, -5).

</span>2b + 3 > 11 reduces to 2b > 8, which in turn reduces to b > 4:  (4, infinity).

It may be helpful to graph these sets.

If you really do mean   "<span>10 < –2b or 2b + 3 > 11," then the "solution" is made up of two sub-intervals:  b < -5 and b > 4.

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