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2 years ago

5x + 7y = 5 10x + 14y = 10 solve by elimination

Mathematics

2 answers:

sesenic [268]2 years ago

8 0

Multiply the first equation by -2

Reika [66]2 years ago

6 0

The answer is:

x= 46/5

y= 5/7

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The diagram shows JKL. Which term describes point M?

laiz [17]

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A; Orthocenter

Step-by-step explanation:

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3 years ago

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If f(x)=-9x-3, find f(-5)

Andrews [41]

Answer:

Step-by-step explanation:

f(-5) = -9 × (-5) - 3 = 45 - 3 = 42

If you have any questions about the way I solved it, don't hesitate to ask me in the comments below =)

5 0

3 years ago

Simplify using the distributive property. 1/4 (4x + 8)

tiny-mole [99]

Answer:

1x+2

Step-by-step explanation:

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5 0

3 years ago

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I need help answering

STALIN [3.7K]

25/5 - 0.2(5)
5 - 1
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8 0

4 years ago

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Integrate xe^(-x^2).

Gekata [30.6K]

You can easily integrate it using a simple substitution:

$\large\begin{array}{l} \mathsf{\displaystyle\int\!x\,e^{-x^2}\,dx}\\\\ =\mathsf{\displaystyle\int\!\left(-\frac{1}{2}\right)\cdot (-2)x\,e^{-x^2}\,dx}\\\\ =\mathsf{\displaystyle-\,\frac{1}{2}\int\!\,e^{-x^2}\cdot (-2x)\,dx\qquad\quad(i)}\\\\ \end{array}$

$\large\begin{array}{l} \textsf{Let}\\\\ \mathsf{-x^2=u,}\quad\textsf{then}\quad\mathsf{-2x\,dx=du}\\\\\\ \textsf{so (i) becomes}\\\\ =\mathsf{\displaystyle-\,\frac{1}{2}\int\!e^u\,du}\\\\ =\mathsf{\displaystyle-\,\frac{1}{2}\cdot e^u+C}\\\\ =\mathsf{\displaystyle-\,\frac{1}{2}\cdot e^{-2x}+C}\\\\\\ \boxed{\begin{array}{c} \mathsf{\displaystyle\int\!x\,e^{-x^2}\,dx=-\,\frac{1}{2}\,e^{-x^2}+C} \end{array}}\qquad\checkmark \end{array}$

If you're having problems understanding this answer, try seeing it through your browser: brainly.com/question/2159730

$\large\textsf{I hope it helps. :-)}$

Tags: <em>integrate substitution indefinite integral exponential composite calculus</em>

7 0

4 years ago

5x + 7y = 5 10x + 14y = 10 solve by elimination​

5x + 7y = 5 10x + 14y = 10 solve by elimination