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Question

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match each compound inequality on the left to the graph that represents its solution on the right.
$4x - 3 > 9$ or $-8x \geq 16$
$8x \geq -24$ and $10 > 2x + 6$
$-10 \leq 6x + 2 < 20$

Explanation:

Step1: Solve \(4x - 3>9\) or \(-8x\geq16\)

  • Solve \(4x - 3>9\):

Add 3 to both sides: \(4x>9 + 3=12\)
Divide by 4: \(x > 3\)

  • Solve \(-8x\geq16\):

Divide by - 8 (reverse inequality): \(x\leq - 2\)
So the solution is \(x>3\) or \(x\leq - 2\). The graph with an open circle at 3 (for \(x > 3\)) and a closed circle at - 2 (for \(x\leq - 2\)) and lines extending is the second graph (with open at 3, closed at - 2).

Step2: Solve \(8x\geq - 24\) and \(10>2x + 6\)

  • Solve \(8x\geq - 24\):

Divide by 8: \(x\geq - 3\)

  • Solve \(10>2x + 6\):

Subtract 6: \(4>2x\)
Divide by 2: \(2>x\) or \(x < 2\)
So the solution is \(-3\leq x<2\). The graph with a closed circle at - 3 and an open circle at 2 is the first graph (closed at - 3, open at 2).

Step3: Solve \(-10\leq6x + 2<20\)

  • Subtract 2 from all parts: \(-10-2\leq6x+2 - 2<20 - 2\)

\(-12\leq6x<18\)

  • Divide by 6: \(\frac{-12}{6}\leq\frac{6x}{6}<\frac{18}{6}\)

\(-2\leq x<3\)
So the solution is \(-2\leq x<3\). The graph with a closed circle at - 2 and an open circle at 3 is the third graph (closed at - 2, open at 3).

Answer:

  • \(4x - 3>9\) or \(-8x\geq16\) matches the second graph (with open circle at 3, closed at - 2).
  • \(8x\geq - 24\) and \(10>2x + 6\) matches the first graph (closed at - 3, open at 2).
  • \(-10\leq6x + 2<20\) matches the third graph (closed at - 2, open at 3).