<h3><u>The value of c is greater than or equal to the value 9.5</u></h3>
2c ≥ 19
We can treat this inequality like a standard algebraic equation.
<em><u>Divide both sides by 2.</u></em>
c ≥ 9.5
The Solution are : a=3.
b=1.
Given:
Choose a number between 0 and 20.
If the difference is less than 10 then Eric wins.
Let us x is Eric's number. 0 <u><</u> x <u><</u> 20
If Eric wins. |x -7| < 10
|x-7| < 10 → -10 < x-7 < 10 → -10 + 7 < x - 7 + 7 < 10 + 7 → -3 < x < 17
Taking into account that the number must be given between 0 and 20.
0 <u><</u> x <u><</u> 20
-3 < x < 17
→ 0 < x < 16