Question

Which of the following sets shows all the numbers from the set {1, 2.5, 3, 4.5, 5} that make the inequality 3a + 4 ≥ 13 true?

A; {2.5, 3, 4.5}
B; {1, 2.5}
C; {3, 4.5, 5}
D; {4.5, 5}

Answer 1

The answer set is {3,4.5,5} which is letter c 

Answer 2

The correct Options are : C; {3, 4.5, 5}

Explanation:

3a + 4 ≥ 13

Subtracting 4 from both the sides

⇒ 3a + 4 - 4 ≥ 13 - 4

⇒ 3a ≥ 9

Dividing by 3 both the sides

⇒ a ≥ 3

Therefore, The numbers from the set are : 3 , 4.5 , 5

Thus, The correct Options are : C; {3, 4.5, 5}