Question

What is the solution set for the inequality 3x - 7 > 9 if the replacement set is {-2, 0, 5, 7, 11, 13} ?

a. {-2, 0, 5}
b. {7, 11, 13}
c. {-2, 0, 5, 7, 11, 13}
d. {0, 5, 7, 11}

Answer 1

b.
3x-7>9
3x>9+7
3x>16
x>16/3

Answer 2

the answer is B?

Answer 3

The answer to the equation is x>16/3 or 5 1/3

Note b has all elements >5.......it will work.

Answer 4

when in doubt, test the answer. Like try 7
3(7)-7>9
14>9 so true then do the other two 11, and 13 you will find them true.