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If the area of a parallelogram is \(\left(2 x^{2}-17 x+35\right)\) square centimeters and its base is \((2 x-7)\) centimeters, find its height.

Short Answer

Expert verified
The height of the parallelogram is \(x - 5\) cm.

Step by step solution

01

Understand the Formula for Area of Parallelogram

The area of a parallelogram is given by the formula: \( \text{Area} = \text{Base} \times \text{Height} \). In this problem, the area is provided as \( (2x^2 - 17x + 35) \) and the base as \( (2x - 7) \). We need to find the height.
02

Set Up the Equation

Since the area formula is \( \text{Area} = \text{Base} \times \text{Height} \), we can write:\[(2x^2 - 17x + 35) = (2x - 7) \times \text{Height}.\]We need to find the height by solving this equation.
03

Solve for Height

To find the height, divide both sides of the equation by the base term \( (2x - 7) \):\[\text{Height} = \frac{2x^2 - 17x + 35}{2x - 7}.\]Perform polynomial division to simplify this expression.
04

Perform Polynomial Division

Divide \( 2x^2 - 17x + 35 \) by \( 2x - 7 \). Follow these steps for long division:1. Divide the first term of the numerator \( 2x^2 \) by the first term of the denominator \( 2x \) to get \( x \).2. Multiply \( x \) by the entire divisor \( (2x - 7) \), giving \( 2x^2 - 7x \).3. Subtract \( 2x^2 - 7x \) from \( 2x^2 - 17x + 35 \) to get \( -10x + 35 \).4. Divide \( -10x \) by \( 2x \) to get \( -5 \).5. Multiply \( -5 \) by \( (2x - 7) \), giving \( -10x + 35 \).6. Subtract \( -10x + 35 \) from \( -10x + 35 \) to get \( 0 \).The quotient is \( x - 5 \) with no remainder.
05

Write Down the Result

The height of the parallelogram can be expressed as \( x - 5 \) after solving the polynomial division. Therefore, the height in terms of \(x\) is \(x - 5\) centimeters.

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Key Concepts

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

Polynomial Division
Polynomial division is a mathematical technique used to divide one polynomial by another. It's similar to long division with numbers but involves variables. This process is crucial when dealing with algebraic expressions that need simplification.Imagine you have a polynomial like \[ 2x^2 - 17x + 35 \] and you need to divide it by another polynomial, \[ 2x - 7 \]. The goal is to determine what polynomial, when multiplied by \[ 2x - 7 \], matches the original polynomial.To perform polynomial division:
  • First, divide the leading term of the dividend (\[ 2x^2 \]) by the leading term of the divisor (\[ 2x \]). This gives you the first term of your quotient, \[ x \].
  • Multiply the entire divisor by this new term to subtract from the original polynomial, simplifying the polynomial further.
  • Continue this process with each subsequent term until the remainder is zero or a polynomial of lower degree than the divisor.
In our example, this results in the quotient \[ x - 5 \]. Polynomial division is a powerful tool for simplifying and solving many algebraic problems.
Area of Parallelogram
Understanding the area of a parallelogram is essential in geometry and algebra. A parallelogram is a four-sided closed figure with opposite sides that are parallel and equal in length. The formula for the area of a parallelogram is simple:\[ \text{Area} = \text{Base} \times \text{Height} \].In this equation, the 'Base' is any one of the sides, and the 'Height' is the perpendicular distance from that base to the opposite side.When given the area and the base of a parallelogram, we can rearrange the area formula to solve for the height:\[ \text{Height} = \frac{\text{Area}}{\text{Base}} \].This was precisely what we tackled in the original exercise. By dividing the given polynomial expression for the area by the expression for the base, we found the expression for the height in terms of the variable \( x \). Understanding these relationships helps in solving real-world spatial problems efficiently.
Algebraic Equations
Algebraic equations are mathematical statements that assert the equality of two expressions. They usually contain one or more variables, which represent unknown values, and can be solved to find these unknowns.In the context of the parallelogram problem, we started with the equation:\[ (2x^2 - 17x + 35) = (2x - 7) \times \text{Height} \].This setup allows us to isolate and solve for the height, an unknown variable in this scenario. Solving involves manipulating the equation using algebraic operations such as division, especially when dealing with polynomials.Algebraic equations are the foundation for expressing relationships and dependencies between quantities. They provide a systematic way to solve problems involving unknown values, such as finding the height given an area and base, as demonstrated in our exercise. Mastering algebraic equations equips you to handle more complex scenarios both in academic settings and in practical applications.

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Most popular questions from this chapter

Complete the following table for the inverse variation \(y=\frac{k}{x}\) over each given value of \(k .\) Plot the points on a rectangular coordinate system. $$ \begin{array}{|c|c|c|c|c|c|} \hline x & {\frac{1}{4}} & {\frac{1}{2}} & {1} & {2} & {4} \\ \hline y =\frac{k}{x} & {} & {} & {} & {} & {} \\ \hline \end{array} $$ $$ k=5 $$

Find each square root. See Section 1.3. $$ \sqrt{\frac{1}{25}} $$

Write an equation to describe each variation. Use k for the constant of proportionality. See Examples 1 through 7. \(y\) varies jointly as \(q, r,\) and \(t\)

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Try performing the following division without changing the order of the terms. Describe why this makes the process more complicated. Then perform the division again after putting the terms in the dividend in descending order of exponents. $$ \frac{4 x^{2}-12 x-12+3 x^{3}}{x-2} $$

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