Solving the First Inequality

Oct 13, 2025 by wbrum.org 96 views

Solving Inequalities: Finding the Ordered Pair that Makes Both Inequalities True

In mathematics, inequalities are used to describe relationships between variables. When solving inequalities, we often need to find the values of the variables that satisfy both inequalities simultaneously. In this article, we will explore how to solve inequalities and find the ordered pair that makes both inequalities true.

An inequality is a statement that compares two expressions using a mathematical symbol, such as <, >, ≤, or ≥. Inequalities can be used to describe relationships between variables, and they can be used to solve problems in a variety of fields, including algebra, geometry, and calculus.

The Given Inequalities

The two inequalities given in this problem are:

$y < 3x - 1$
$y ≥ -x + 4$

Solving the First Inequality

To solve the first inequality, we need to isolate the variable $y$ . We can do this by subtracting $3x$ from both sides of the inequality:

y - 3x < -1

Next, we can add $3x$ to both sides of the inequality to get:

y < 3x - 1 + 3x

Simplifying the right-hand side of the inequality, we get:

y < 6x - 1

Solving the Second Inequality

To solve the second inequality, we need to isolate the variable $y$ . We can do this by adding $x$ to both sides of the inequality:

y + x ≥ 4

Next, we can subtract $x$ from both sides of the inequality to get:

y ≥ 4 - x

Finding the Ordered Pair

To find the ordered pair that makes both inequalities true, we need to find the values of $x$ and $y$ that satisfy both inequalities simultaneously. We can do this by substituting the expression for $y$ from the first inequality into the second inequality:

6x - 1 ≥ 4 - x

Simplifying the inequality, we get:

7x ≥ 5

Dividing both sides of the inequality by 7, we get:

x ≥ \frac{5}{7}

Checking the Answer Choices

Now that we have found the value of $x$ , we can check the answer choices to see which one satisfies both inequalities. Let's start with answer choice A:

$(4, 0)$

Substituting $x = 4$ and $y = 0$ into the first inequality, we get:

0 < 3(4) - 1

Simplifying the inequality, we get:

0 < 11

This is true, so answer choice A satisfies the first inequality.

Substituting $x = 4$ and $y = 0$ into the second inequality, we get:

0 ≥ -4 + 4

Simplifying the inequality, we get:

0 ≥ 0

This is true, so answer choice A satisfies the second inequality.

In this article, we have explored how to solve inequalities and find the ordered pair that makes both inequalities true. We have used the given inequalities to find the values of $x$ and $y$ that satisfy both inequalities simultaneously. We have also checked the answer choices to see which one satisfies both inequalities.

The correct answer is:

A. (4, 0)

This is the only answer choice that satisfies both inequalities.

Solving inequalities can be a challenging task, but with practice and patience, you can become proficient in solving them. Remember to always check your answer choices to make sure they satisfy both inequalities. With this knowledge, you can tackle more complex problems and become a master of inequalities.
Solving Inequalities: A Q&A Guide

In our previous article, we explored how to solve inequalities and find the ordered pair that makes both inequalities true. In this article, we will answer some frequently asked questions about solving inequalities.

Q: What is the difference between a linear inequality and a quadratic inequality?

A: A linear inequality is an inequality that can be written in the form $ax + by < c$ , where $a$ , $b$ , and $c$ are constants. A quadratic inequality, on the other hand, is an inequality that can be written in the form $ax^2 + bx + c < 0$ , where $a$ , $b$ , and $c$ are constants.

Q: How do I solve a linear inequality?

A: To solve a linear inequality, you need to isolate the variable on one side of the inequality. You can do this by adding or subtracting the same value to both sides of the inequality, or by multiplying or dividing both sides of the inequality by the same non-zero value.

Q: How do I solve a quadratic inequality?

A: To solve a quadratic inequality, you need to find the values of the variable that make the quadratic expression equal to zero. You can do this by factoring the quadratic expression, or by using the quadratic formula.

Q: What is the difference between a strict inequality and a non-strict inequality?

A: A strict inequality is an inequality that uses the symbols < or >, while a non-strict inequality is an inequality that uses the symbols ≤ or ≥.

Q: How do I graph a linear inequality?

A: To graph a linear inequality, you need to graph the corresponding linear equation, and then shade the region that satisfies the inequality. If the inequality is strict, you should shade the region on one side of the line, while if the inequality is non-strict, you should shade the region on both sides of the line.

Q: How do I graph a quadratic inequality?

A: To graph a quadratic inequality, you need to graph the corresponding quadratic equation, and then shade the region that satisfies the inequality. If the inequality is strict, you should shade the region on one side of the parabola, while if the inequality is non-strict, you should shade the region on both sides of the parabola.

Q: Can I use a graphing calculator to solve inequalities?

A: Yes, you can use a graphing calculator to solve inequalities. You can graph the corresponding linear or quadratic equation, and then use the calculator to determine the region that satisfies the inequality.

Q: What are some common mistakes to avoid when solving inequalities?

A: Some common mistakes to avoid when solving inequalities include:

Not isolating the variable on one side of the inequality
Not checking the solution in the original inequality
Not considering the case where the inequality is non-strict
Not graphing the corresponding linear or quadratic equation

In this article, we have answered some frequently asked questions about solving inequalities. We have discussed the difference between linear and quadratic inequalities, and how to solve them. We have also discussed how to graph linear and quadratic inequalities, and how to use a graphing calculator to solve inequalities. Finally, we have discussed some common mistakes to avoid when solving inequalities.

Solving inequalities can be a challenging task, but with practice and patience, you can become proficient in solving them. Remember to always check your solution in the original inequality, and to consider the case where the inequality is non-strict. With this knowledge, you can tackle more complex problems and become a master of inequalities.