Solve the inequality: -7 \(\leq\) 9 - 8x < 16 - x
The correct answer is D. -1 < x \(\leq\) 2
To solve the inequality -7 \(\leq\) 9 - 8x < 16 - x, we can start by subtracting 9 from all sides to get:
-16 \(\leq\) -8x < 7 - x
Next, we can add x to all sides to get:
-16 + x \(\leq\) -7x < 7
Now, we can divide all sides by -7, remembering to flip the inequality signs since we are dividing by a negative number:
\(\frac{-16 + x}{-7}\) \(\geq\) x > -1
Simplifying the left side, we get:
\(\frac{x - 16}{-7}\) \(\geq\) x > -1
Multiplying both sides of the left inequality by -7, we get:
x - 16 \(\leq\) -7x > -1
Adding 7x to both sides of the left inequality, we get:
8x - 16 \(\leq\) 0 > -1
Adding 16 to both sides of the left inequality, we get:
8x \(\leq\) 16 > -1
Finally, dividing all sides of the left inequality by 8, we get:
x \(\leq\) 2 > -1
So the solution to the inequality is: -1 < x \(\leq\) 2.
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