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3 years ago

Solving liner system, substitution method 2x-y=23 x-9=-3

2 answers:

8 0

The easiest way to solve that would be elimination method, but if you have to do substitution:
x-9=-3
add 9 to each side to get
x=6
then plug 6 into the other equation for x
2(6)-y=23
and solve for y :)

olya-2409 [2.1K]3 years ago

7 0

2x - y = 23
x - 9 = -3

x - 9 = -3
<u> + 9 + 9</u>
   x = 6
2(6) - y = 23
12 - y = 23
<u>- 12 - 12</u>
   -y = 11
   y = -11
(x, y) = (6, -11)

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Answer:

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Step-by-step explanation:

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2 years ago

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Klio2033 [76]

Answer:

the question is incomplete, the complete question is

"Finding Derivatives Implicity In Exercise,Find dy/dx implicity . $x^{2}e^{-x}+2y^{2}-xy$ "

Answer : $\frac{dy}{dx}=\frac{y-(2-x)xe^{-x}}{(4y-x)}$

Step-by-step explanation:

From the expression $x^{2}e^{-x}+2y^{2}-xy$ " y is define as an implicit function of x, hence we differentiate each term of the equation with respect to x.

we arrive at

$\frac{d}{dx}(x^{2}e^{-x )+\frac{d}{dx} (2y^{2})-\frac{d}{dx}xy=0\\$

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$(2xe^{-x}-x^{2}e^{-x})+4y\frac{dy}{dx}-x\frac{dy}{dx} -y=0\\\\(2-x)xe^{-x}+(4y-x)\frac{dy}{dx}-y=0 \\$ .

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3 years ago

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Neko [114]

Answer:

Your teacher is right, there is not enough info

Step-by-step explanation:

<h3>Question 1</h3>

We can see that RS is divided by half

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So P is not on the perpendicular bisector of RS

<h3>Question 2</h3>

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There is no indication that PD = PF or ∠DEP ≅ FEP

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2 years ago

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Keith_Richards [23]

Answer:

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Step-by-step explanation:

320 oz is 20 pounds:))

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2 years ago

Tell whether the ordered pair is a solution of the equation<br> y=5x; (15,-3)

n200080 [17]

Answer:

This ordered pair is NOT a solution of the equation.

Step-by-step explanation:

First, it is important to note that ordered pairs consist of (x, y) so in this case

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2 years ago