Question

For each inequality, determine which of the given numbers are in the solution set:
2x + 3 >11; -3, 4, 5, 7

Answer 1

If x = -3
Then 2x + 3 = 2 x (-3) + 3 = -3
Since, -3 > 11 is false.
So -3 is not in the solution of 2x + 3 > 11
If, x = 4, en 2x + 3 = 2 x 4 + 3 = 11
since  11 > 11 is false.
So 4 is not in the solution of 2x + 3 > 11
If x = 5, en 2x + 3 = 2 x 5 + 3 = 13
Since,13 > 11 is true ;
So, 5 is in the solution of 2x + 3 >11
Similarly, x = 7 is in the solution of 2x  3 > 11.