Math Problem Statement
Which graph represents the solution set of this inequality: -2x + 7 < 23?
Solution
To solve the inequality and identify the correct graph, let's analyze the inequality step-by-step:
Given Inequality:
Step 1: Isolate
- Subtract 7 from both sides:
- Divide by -2 (and remember to reverse the inequality since we are dividing by a negative number):
Solution Set
The solution to the inequality is:
Interpreting the Graph
- We are looking for a graph that represents , which should be an open circle at -8 (indicating that -8 is not included) and a line extending to the right (since is greater than -8).
Choosing the Correct Option
- Option B represents the correct solution. It shows an open circle at -8 and an arrow extending to the right.
Answer:
The correct answer is B.
Would you like further details or have any questions?
Here are five related questions to deepen understanding:
- How do you handle inequalities when multiplying or dividing by a negative number?
- What would the graph look like if the inequality was ?
- How would the solution change if the inequality was ?
- What if the inequality was instead?
- How can inequalities be represented on a number line when using intervals?
Tip: Remember, whenever dividing or multiplying by a negative in inequalities, flip the inequality sign!
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Math Problem Analysis
Mathematical Concepts
Algebra
Inequalities
Formulas
-2x + 7 < 23
Subtract 7 from both sides: -2x < 16
Divide by -2 and reverse inequality: x > -8
Theorems
Reversing the inequality when dividing or multiplying by a negative number
Suitable Grade Level
Grades 7-9