Math Problem Statement

Select all the points that are solutions to the inequality x - y > -5.

Solution

The inequality given is xy>5x - y > -5, which means the shaded region is the solution set for the inequality where xy>5x - y > -5. The boundary line xy=5x - y = -5 is dashed, indicating points on the line are not included in the solution.

To determine which points are solutions:

Step 1: Rewrite the inequality

xy>5x - y > -5 Rewriting it to isolate yy: y<x+5y < x + 5

This represents the region below the line y=x+5y = x + 5 (not including the line itself).

Step 2: Test the given points

Substitute each point into xy>5x - y > -5 or equivalently y<x+5y < x + 5:

  1. (0, 0): 00>50 - 0 > -5 is true (or 0<0+50 < 0 + 5 is true). Solution.

  2. (2, 5): 25>52 - 5 > -5 is true (or 5<2+55 < 2 + 5 is true). Solution.

  3. (-1, 5): 15>5-1 - 5 > -5 is false (or 5<1+55 < -1 + 5 is false). Not a solution.

  4. (7, -12): 7(12)>57 - (-12) > -5 is true (or 12<7+5-12 < 7 + 5 is true). Solution.

  5. (-4, 2): 42>5-4 - 2 > -5 is false (or 2<4+52 < -4 + 5 is false). Not a solution.

Final Answer:

The points that satisfy the inequality are:

  • (0, 0)
  • (2, 5)
  • (7, -12)

Would you like a detailed graph explanation?


Related Questions:

  1. What is the difference between >> and \geq in inequalities?
  2. How can I graph a linear inequality step by step?
  3. Why does a dashed line indicate points are not part of the solution?
  4. How would the solution region change if the inequality were xy5x - y \leq -5?
  5. Can inequalities have multiple solution regions?

Tip: Always test points within the shaded region to ensure they satisfy the inequality.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Inequalities
Graphing Inequalities

Formulas

y < x + 5 (rewritten from x - y > -5)

Theorems

Properties of inequalities

Suitable Grade Level

Grades 8-10