which set expresses the solution to the compound inequality? -2 ≤ 2x+1/3 -4 < 1?

A) {x : 3 ≤ x < 7}
B) {x : 5/2 ≤ x < 1}
C) {x : 5/2 ≤ x < 1}
D) {x : -3/2 ≤ x < 1}

1 answer

To solve the compound inequality \(-2 \leq \frac{2x + 1}{3} - 4 < 1\), we will break it down into two parts.

First, let's address the left side of the compound inequality:

  1. \(-2 \leq \frac{2x + 1}{3} - 4\)

Add 4 to both sides:

\[ -2 + 4 \leq \frac{2x + 1}{3} \]

This simplifies to:

\[ 2 \leq \frac{2x + 1}{3} \]

Next, multiply both sides by 3:

\[ 6 \leq 2x + 1 \]

Subtract 1 from both sides:

\[ 5 \leq 2x \]

Now divide by 2:

\[ \frac{5}{2} \leq x \]

This can also be expressed as:

\[ x \geq \frac{5}{2} \]

Now let's address the right side of the compound inequality:

  1. \(\frac{2x + 1}{3} - 4 < 1\)

Add 4 to both sides:

\[ \frac{2x + 1}{3} < 5 \]

Multiply both sides by 3:

\[ 2x + 1 < 15 \]

Subtract 1 from both sides:

\[ 2x < 14 \]

Now divide by 2:

\[ x < 7 \]

Now we have the solutions from both parts:

\[ \frac{5}{2} \leq x < 7 \]

In set notation, this is expressed as:

\[ { x : \frac{5}{2} \leq x < 7 } \]

Now we need to find the correct answer from the given options. The answer is closest to:

B) \({ x : \frac{5}{2} \leq x < 1 }\)

However, notice that it looks like there's a typo in the answer options because \(< 1\) is not correct based on our derived inequalities. The correct condition should state \(< 7\), which is not present.

Therefore, the answer depends on clarifying your available options, but based on the original compilation provided, the correct solution is:

\({ x : \frac{5}{2} \leq x < 7 }. \)

If we go strictly by the available options, there's no completely correct one. If we were to pick from these options strictly on the available constructions, and given that B is repeated, this might be a copy error.

Thus, I can only say none of the provided options strictly represents the solution. Please check the options again, as the correct derived solution doesn't match the available selections.