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mamaluj [8]
2 years ago
8

Kendall says the sum of (6x2 4xy 2y2) and (4x2 – 2xy – 3y2) is (10x2 2xy – 5y2). What error did Kendall make? He combined the li

ke terms 6x2 and 4x2 incorrectly. He combined the like terms 4xy and –2xy incorrectly. He combined the like terms 2y2 and –3y2 incorrectly. He subtracted the polynomials instead of adding.
SAT
2 answers:
Ilia_Sergeevich [38]2 years ago
8 0

Answer:

C

Explanation:

Luda [366]2 years ago
7 0

Answer:

He combined the like terms 2y^2 and -3y^2 incorrectly.

Explanation:

2y^2 + (-3y^2) = -1y^2. Not -5y^2.

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The point (−2,4) lies on the curve in the xy-plane given by the equation f(x)g(y)=17−x−y, where f is a differentiable function o
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The value of \frac{dy}{dx} is -3. \blacksquare

<h2>Procedure - Differentiability</h2><h3 /><h3>Chain rule and derivatives</h3><h3 />

We derive an expression for \frac{dy}{dx} by means of chain rule and differentiation rule for a product of functions:

\frac{d}{dx}[f(x)\cdot g(y)] = [f'(x)\cdot \frac{dx}{dx}]\cdot g(y) + f(x) \cdot [g'(y)\cdot \frac{dy}{dx} ]

\frac{d}{dx}[f(x)\cdot g(y)] = f'(x)\cdot g(y) +f(x)\cdot g'(y)\cdot \frac{dy}{dx} (1)

If we know that f(x) \cdot g(y) = 17-x-y, f(-2) = 3,<em> </em>f'(-2) = 4,<em> </em>g(4) = 5 andg'(4) = 2, then we have the following expression:

-1-\frac{dy}{dx} = (4)\cdot (5) + (3)\cdot (2) \cdot \frac{dy}{dx}

-1-\frac{dy}{dx} = 20 + 6\cdot \frac{dy}{dx}

7\cdot \frac{dy}{dx} = -21

\frac{dy}{dx} = -3

The value of \frac{dy}{dx} is -3. \blacksquare

To learn more on differentiability, we kindly invite to check this verified question: brainly.com/question/24062595

<h3>Remark</h3>

The statement is incomplete and full of mistakes. Complete and corrected form is presented below:

<em>The point (-2, 4) lies on the curve in the xy-plane given by the equation </em>f(x)\cdot g(y) = 17 - x\cdot y<em>, where </em>f<em> is a differentiable function of </em>x<em> and </em>g<em> is a differentiable function of </em>y<em>. Selected values of </em>f<em>, </em>f'<em>, </em>g<em> and </em>g'<em> are given below: </em>f(-2) = 3<em>, </em>f'(-2) = 4<em>, </em>g(4) = 5<em>, </em>g'(4) = 2<em>. </em>

<em />

<em>What is the value of </em>\frac{dy}{dx}<em> at the point </em>(-2, 4)<em>?</em>

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The information that the dialogue revealed was that the guards do not recognize each other at first.

From the complete question, we can deduce that the <em>guards </em>didn't <em>recognize </em>each other at first. Bernardo didn't see Francisco properly at first and he thought that he was the king before he saw him clearly.

A dialogue simply refers to a conversation between two to more people. The effect of the <em>dialogue</em> was that it caused a feeling of confusion and distrust. Bernardo and Francisco were confused.

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