Solve The Equation:$-7 = \sqrt{3 + 20z} - 12$Choose All Answers That Apply:A. 1.1 B. 2 C. 2.9 D. 5 E. The Equation Has No Solutions.

Introduction

In this article, we will be solving the equation $-7 = \sqrt{3 + 20z} - 12$. This equation involves a square root and a variable, making it a bit more complex than a simple linear equation. We will break down the solution step by step, using algebraic manipulations to isolate the variable and find its value.

Step 1: Isolate the Square Root

The first step in solving this equation is to isolate the square root term. We can do this by adding 12 to both sides of the equation:

$$-7 + 12 = \sqrt{3 + 20z}$$

This simplifies to:

$$5 = \sqrt{3 + 20z}$$

Step 2: Square Both Sides

Next, we will square both sides of the equation to eliminate the square root. This will give us:

$$5^2 = (\sqrt{3 + 20z})^2$$

Using the property of exponents that $(a^m)^n = a^{mn}$, we can simplify this to:

$$25 = 3 + 20z$$

Step 3: Isolate the Variable

Now, we need to isolate the variable $z$. We can do this by subtracting 3 from both sides of the equation:

$$25 - 3 = 20z$$

This simplifies to:

$$22 = 20z$$

Step 4: Solve for $z$

Finally, we can solve for $z$ by dividing both sides of the equation by 20:

$$\frac{22}{20} = z$$

This simplifies to:

$$1.1 = z$$

Conclusion

We have successfully solved the equation $-7 = \sqrt{3 + 20z} - 12$ and found that the value of $z$ is 1.1. This is the only solution to the equation, as we can verify by plugging $z = 1.1$ back into the original equation.

Answer Choices

Based on our solution, we can see that the correct answer choices are:

• A. 1.1

The other answer choices, B. 2, C. 2.9, and D. 5, are not solutions to the equation.

The Equation Has No Solutions

However, we should also note that the equation has no solutions in the sense that there is no real value of $z$ that satisfies the equation. This is because the square root term is always non-negative, and the left-hand side of the equation is negative. Therefore, the equation has no real solutions.

Final Answer

In conclusion, the correct answer choices are A. 1.1, and the equation has no solutions in the sense that there is no real value of $z$ that satisfies the equation.

Mathematical Concepts Used

• Algebraic manipulations
• Square root properties
• Exponent properties
• Isolating variables
• Solving linear equations

Real-World Applications

• Solving equations is a fundamental skill in mathematics and has many real-world applications, such as:
  • Physics: solving equations to describe the motion of objects
  • Engineering: solving equations to design and optimize systems
  • Economics: solving equations to model and analyze economic systems

Tips and Tricks

• When solving equations, it's essential to isolate the variable and use algebraic manipulations to simplify the equation.
• Square root properties and exponent properties can be useful tools in solving equations.
• Be careful when working with negative numbers and square roots, as they can lead to complex solutions.

Practice Problems

• Solve the equation $2x + 5 = 11$
• Solve the equation $\sqrt{x - 3} = 2$
• Solve the equation $x^2 + 4x + 4 = 0$

Conclusion

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Introduction

In our previous article, we solved the equation $-7 = \sqrt{3 + 20z} - 12$ and found that the value of $z$ is 1.1. However, we also noted that the equation has no solutions in the sense that there is no real value of $z$ that satisfies the equation. In this article, we will answer some frequently asked questions about solving equations and provide additional tips and tricks for solving equations.

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

A: A linear equation is an equation in which the highest power of the variable is 1. For example, $2x + 3 = 5$ is a linear equation. A quadratic equation, on the other hand, is an equation in which the highest power of the variable is 2. For example, $x^2 + 4x + 4 = 0$ is a quadratic equation.

Q: How do I solve a quadratic equation?

A: To solve a quadratic equation, you can use the quadratic formula: $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$. This formula will give you two solutions for the equation.

Q: What is the quadratic formula?

A: The quadratic formula is a formula that is used to solve quadratic equations. It is given by: $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$. This formula will give you two solutions for the equation.

Q: How do I simplify a square root expression?

A: To simplify a square root expression, you can use the following properties:

• $\sqrt{a} \cdot \sqrt{b} = \sqrt{ab}$
• $\sqrt{a} \div \sqrt{b} = \sqrt{\frac{a}{b}}$
• $\sqrt{a^2} = a$

Q: What is the difference between a rational number and an irrational number?

A: A rational number is a number that can be expressed as the ratio of two integers. For example, $\frac{1}{2}$ is a rational number. An irrational number, on the other hand, is a number that cannot be expressed as the ratio of two integers. For example, $\sqrt{2}$ is an irrational number.

Q: How do I determine if a number is rational or irrational?

A: To determine if a number is rational or irrational, you can use the following test:

• If the number can be expressed as the ratio of two integers, it is rational.
• If the number cannot be expressed as the ratio of two integers, it is irrational.

Q: What is the difference between a real number and a complex number?

A: A real number is a number that can be expressed on the number line. For example, 3 is a real number. A complex number, on the other hand, is a number that cannot be expressed on the number line. For example, $3 + 4i$ is a complex number.

Q: How do I add and subtract complex numbers?

A: To add and subtract complex numbers, you can use the following rules:

• $(a + bi) + (c + di) = (a + c) + (b + d)i$
• $(a + bi) - (c + di) = (a - c) + (b - d)i$

Q: What is the difference between a linear equation and a nonlinear equation?

A: A linear equation is an equation in which the highest power of the variable is 1. For example, $2x + 3 = 5$ is a linear equation. A nonlinear equation, on the other hand, is an equation in which the highest power of the variable is greater than 1. For example, $x^2 + 4x + 4 = 0$ is a nonlinear equation.

Q: How do I solve a nonlinear equation?

A: To solve a nonlinear equation, you can use a variety of techniques, including:

• Graphing the equation
• Using numerical methods
• Using algebraic manipulations

Conclusion

Solving equations is a fundamental skill in mathematics, and it has many real-world applications. By using algebraic manipulations, square root properties, and exponent properties, we can solve equations and find the value of the variable. In this article, we answered some frequently asked questions about solving equations and provided additional tips and tricks for solving equations.

Mathematical Concepts Used

• Algebraic manipulations
• Square root properties
• Exponent properties
• Quadratic formula
• Rational numbers
• Irrational numbers
• Complex numbers
• Linear equations
• Nonlinear equations

Real-World Applications

• Solving equations is a fundamental skill in mathematics and has many real-world applications, such as:
  • Physics: solving equations to describe the motion of objects
  • Engineering: solving equations to design and optimize systems
  • Economics: solving equations to model and analyze economic systems

Tips and Tricks

• When solving equations, it's essential to isolate the variable and use algebraic manipulations to simplify the equation.
• Square root properties and exponent properties can be useful tools in solving equations.
• Be careful when working with negative numbers and square roots, as they can lead to complex solutions.

Practice Problems

• Solve the equation $2x + 5 = 11$
• Solve the equation $\sqrt{x - 3} = 2$
• Solve the equation $x^2 + 4x + 4 = 0$

Conclusion

Solving equations is a fundamental skill in mathematics, and it has many real-world applications. By using algebraic manipulations, square root properties, and exponent properties, we can solve equations and find the value of the variable. In this article, we answered some frequently asked questions about solving equations and provided additional tips and tricks for solving equations.