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3 years ago

-2x + 3y=-1 2x + 5y=25 elimination

1 answer:

7 0

-2x + 3y=-1
2x + 5y=25
------------------add
8y = 24
y = 3

-2x + 3y =-1
-2x + 3(3) =-1
-2x + 9 = -1
-2x = -10
x = 2

answer
x = 2 and y = 3 or (2,3)

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Answer:

$\huge \red{ c_3 = - 1}$

Step-by-step explanation:

$c_1 = 1 \\ \\ c_n= - 2c_{n-1}+5 \\ \\ c_2 = - 2c_{2-1}+5 \\ \\ c_2 = - 2c_{1}+5 \\ \\ c_2 = - 2(1)+5 \\ \\ c_2 = - 2+5 \\ \\ \huge \purple{c_2 =3} \\ \\ c_3 = - 2c_{3-1}+5 \\ \\ c_3 = - 2c_{2}+5 \\ \\ c_3 = - 2(3)+5 \\ \\ c_3= - 6+5 \\ \\ \huge \red{ c_3 = - 1}$

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2 years ago

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kodGreya [7K]

Answer:

B. 3

Step-by-step explanation:

Let's make an equation for this. Our unknown number is x.

We are adding 4.

x + 4

Then multiplying by 5.

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(x + 4) • 5 = 35

To solve this, divide both sides by 5.

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Now subtract 4 from both sides.

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This is your answer.

Check this by plugging it back into our original equation.

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Your answer is correct.

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