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inysia [295]
2 years ago
14

Solve the system by elimination 2x-3y=23 x+3y=-20

Mathematics
1 answer:
Fantom [35]2 years ago
4 0

Answer:

x = 1

y = -7

Step-by-step explanation:

2x-3y=23

+ x+3y =-20

3x + 0 = 3

x = 1

(1) + 3y = -20

-1 -1

3y = -21

y = -7

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Answer:

.5

Step-by-step explanation:

22

23

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(Decimal: 0.5)

5 0
2 years ago
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Differentiating a Logarithmic Function in Exercise, find the derivative of the function. See Examples 1, 2, 3, and 4.
Leni [432]

Answer:  \dfrac{2x^2-1}{x(x^2-1)}

Step-by-step explanation:

The given function : y=\ln(x(x^2 - 1)^{\frac{1}{2}})

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Now , Differentiate both sides  with respect to x , we will get

\dfrac{dy}{dx}=\dfrac{1}{x}+\dfrac{1}{2}(\dfrac{1}{x^2-1})\dfrac{d}{dx}(x^2-1) (By Chain rule)

[Note : \dfrac{d}{dx}(\ln x)=\dfrac{1}{x}]

\dfrac{1}{x}+\dfrac{1}{2}(\dfrac{1}{x^2-1})(2x-0)

[ \because \dfrac{d}{dx}(x^n)=nx^{n-1}]

=\dfrac{1}{x}+\dfrac{1}{2}(\dfrac{1}{x^2-1})(2x) = \dfrac{1}{x}+\dfrac{x}{x^2-1}\\\\\\=\dfrac{(x^2-1)+(x^2)}{x(x^2-1)}\\\\\\=\dfrac{2x^2-1}{x(x^2-1)}

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8 0
3 years ago
Expanding polynomial functions using binomial theorem or pascals triangle
konstantin123 [22]

Answer:

The formula for Pascal's Triangle comes from a relationship that you yourself might be able to see in the coefficients below.

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HOPE THIS HELPS!

7 0
3 years ago
Whats the value of x<br> 120°<br> (2x – 10)°
Bess [88]
The answer is 2x-1
Step-by-step explanation:
2x-10^0
Any non zero expression raised to the power of 0 equals 1.
2x-1
So that would be your answer.
Hope that helped.
3 0
2 years ago
Mathematics, 04.03.2020 23:32 jtoole5341 DIVISION OF PROFITS Tom 20% Ellen 30% Sarah 25% Joel 25% Tom, Joel, Sarah, and Ellen di
inn [45]

9514 1404 393

Answer:

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Multiplying by 492, we have ...

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Ellen's share of the profits is $738.

8 0
3 years ago
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