/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 85 Graph the function represented b... [FREE SOLUTION] | 91Ó°ÊÓ

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Graph the function represented by each side of the equation in the same viewing rectangle and solve for \(x\) $$3(x+2)-5 x=3 x-4$$

Short Answer

Expert verified
The solution is \(x = 2\).

Step by step solution

01

Simplify Left Side

Simplify the left side of the equation \(3(x+2)-5x\). Distribute the 3 to both terms inside the parenthesis: \[3 \cdot x + 3 \cdot 2 = 3x + 6.\] Now combine like terms: \[3x + 6 - 5x = -2x + 6.\]
02

Simplify Right Side

On the right side, the expression is already simplified to \(3x - 4\).
03

Set Equations Equal

Set the simplified left and right sides equal to find common \(x\): \[-2x + 6 = 3x - 4.\]
04

Rearrange and Solve for x

Add \(2x\) to both sides to get the terms containing \(x\) on one side:\[6 = 5x - 4.\] Then, add 4 to both sides to isolate terms with \(x\) further: \[10 = 5x.\] Finally, divide both sides by 5 to solve for \(x\): \[x = 2.\]

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Graphing Functions
Graphing functions is an effective way to visually understand solutions to equations. To graph the function given in an equation, each expression on either side represents a separate function. In our exercise, you'll graph the left side: \(3(x+2)-5x\) and the right side: \(3x-4\).

Using graphing tools:
  • Plot the function \(y = -2x + 6\) for the left-hand side.
  • Plot the function \(y = 3x - 4\) for the right-hand side.
Observe where these two lines intersect on the graph. The x-coordinate of this intersection point is the solution to the equation. In this exercise, they intersect at \(x = 2\), which solves the original equation.

Graphing helps not only to find solutions but also to understand the behavior of functions, as you can see which function grows faster or intersects certain points on the coordinate plane.
Distributive Property
The distributive property is a key tool in algebra that allows you to multiply a single term by multiple terms inside a set of parentheses. This helps simplify complex expressions.

In our equation \(3(x+2)-5x\), apply the distributive property as follows:
  • Multiply \(3\) by \(x\) to get \(3x\).
  • Multiply \(3\) by \(2\) to get \(6\).
Putting it together, you simplify the expression to \(3x + 6\).

Using the distributive property helps break down larger problems into more manageable pieces, making it easier to proceed with solving or simplifying an equation.
Combining Like Terms
Combining like terms is a fundamental part of simplifying equations. By doing so, you merge terms with the same variable into a single term, which streamlines the solving process.

After using the distributive property, the expression \(3x + 6 - 5x\) needs further simplification. Look at each term:
  • Terms with \(x\): Combine \(3x\) and \(-5x\) to get \(-2x\).
  • Constant term: \(6\) remains unchanged.
The simplified expression is \(-2x + 6\).

By combining like terms, you reduce confusion, making it simpler to identify relationships between components of the equation, a crucial step before graphing or solving the equation.
Viewing Rectangle
A viewing rectangle is a section of the coordinate plane that you "zoom into", allowing you to focus on areas relevant to your functions or equations.

When graphing both \(y = -2x + 6\) and \(y = 3x - 4\), your viewing rectangle should be large enough to show the intersection point, which is crucial for finding the solution to the equation. Adjusting the viewing rectangle will change how much of the graph and what part of the graph is shown, thus impacting how clearly you can see where the lines meet.

Think of the viewing rectangle as a window into the graph. By setting the appropriate axes limits, you ensure the important features of both functions are visible on your graph. For this exercise, capture the section where \(x\) could be around the solution \(x = 2\), ensuring the intersection point won't be off the screen.

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Most popular questions from this chapter

Explain the mistake that is made. Find the \(x\) - and \(y\) -intercepts of the line with equation \(2 x-3 y=6\) Solution: \(x\) -intercept: set \(x=0\) and solve for \(y\) \(-3 y=6\) The \(x\) -intercept is (0,-2) \(y=-2\) \(y\) -intercept: set \(y=0\) and solve for \(x . \quad 2 x=6\) The \(y\) -intercept is (3,0) \(x=3\)

Explain the mistake that is made. Given the slope, classify the line as rising, falling, horizontal, or vertical. a. \(m=0\) b. \(m\) undefined c. \(m=2\) d. \(m=-1\) Solution: a. vertical line b. horizontal line c. rising d. falling These are incorrect. What mistakes were made?

Refer to the following: Einstein's special theory of relativity states that time is relative: Time speeds up or slows down, depending on how fast one object is moving with respect to another. For example, a space probe traveling at a velocity \(v\) near the speed of light \(c\) will have "clocked" a time \(t\) hours, but for a stationary observer on Earth that corresponds to a time \(t_{0} .\) The formula governing this relativity is given by $$ t=t_{0} \sqrt{1-\frac{v^{2}}{c^{2}}} $$ If the time elapsed on a space probe mission is 18 years but the time elapsed on Earth during that mission is 30 years, how fast is the space probe traveling? Give your answer relative to the speed of light.

Find a quadratic equation whose two distinct real roots are the negatives of the two distinct real roots of the equation \(a x^{2}+b x+c=0\).

Solve the equation \(x^{1 / 2}=-4 x^{1 / 4}+21 .\) Plot both sides of the equation in the same viewing screen, \(y_{1}=x^{1 / 2}\) and \(y_{2}=-4 x^{1 / 4}+21 .\) Does the point(s) of intersection agree with your solution?

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