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\( 6 y+2<-4 \) and \( -4(2 y+3)<-68 \) Solution Interval Notation

Ask by Murphy O'Quinn. in the United States
Jan 23,2025

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Answer

There is no solution to the system of inequalities. **Interval Notation:** \[ \emptyset \]

Solution

To solve the system of inequalities: 1. \( 6y + 2 < -4 \) 2. \( -4(2y + 3) < -68 \) **Step 1: Solve the first inequality** \[ 6y + 2 < -4 \] Subtract 2 from both sides: \[ 6y < -6 \] Divide by 6: \[ y < -1 \] **Step 2: Solve the second inequality** \[ -4(2y + 3) < -68 \] First, distribute the -4: \[ -8y - 12 < -68 \] Add 12 to both sides: \[ -8y < -56 \] Divide by -8 (remember to reverse the inequality sign when dividing by a negative number): \[ y > 7 \] **Step 3: Combine the solutions** The system of inequalities requires both conditions to be true simultaneously: \[ y < -1 \quad \text{and} \quad y > 7 \] However, there is no real number \( y \) that is both less than \(-1\) and greater than \(7\) at the same time. **Conclusion:** There is **no solution** to this system of inequalities. **Interval Notation:** \[ \emptyset \]

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Mind Expander

To solve the first inequality \( 6y + 2 < -4 \), subtract 2 from both sides to get \( 6y < -6 \). Dividing by 6, we find \( y < -1 \). For the second inequality \( -4(2y + 3) < -68 \), start by distributing: \( -8y - 12 < -68 \). Adding 12 to both sides yields \( -8y < -56 \). Dividing by -8 (and flipping the inequality) gives \( y > 7 \). Now, combining both results, we have the solution \( y < -1 \) and \( y > 7 \). In interval notation, this is expressed as \( (-\infty, -1) \cup (7, \infty) \). Also, fun fact: negative numbers often bring surprise when solving inequalities—don’t forget to flip the inequality sign when multiplying or dividing by them! And remember, when dealing with intervals, using open vs. closed brackets correctly is key to showing whether endpoints are included!

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