Question

(07.01 MC) A set of numbers is shown below: {0, 0.8, 1, 3, 6} Which of the following shows all the numbers from the set that make the inequality 7x + 1 ≥ 8 true? A {1, 3, 6} B {3, 6}. C {0, 0.8, 1}
D {0, 0.8}

Answer 1

You can solve this by solving the equation given for x, this will tell you the range of numbers that would make the inequality true.

7x + 1 >= 8
7x >= 8-1
7x >= 7
x >= 7/7
x >= 1

So, x would have to be greater than or equal to 1. Given the set of numbers in the problem; the numbers 1, 3, 6 would satisfy the inequality. The answer is (A).