8. Which of the following mathematical sentences is a linear inequality in one variable?
a. x2 + 3 = 19
b. 2x + 3 = 19
c. x2 +32 19
d. 2x + 3 319
9. The following mathematical sentences are linear inequalities EXCEPT_____
a. x-5 < 9
b. 3x + 5 < 12
c. x2-9 < 27
d. 7 +x< 18
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