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koban [17]
3 years ago
15

Identify a possible first step using the elimination method to solve the system and then find the solution to the system. 2x – 3

y = 6 3x – y = 2 A) Multiply first equation by 3 and second equation by 2, solution (0, 2). B) Multiply first equation by -3 and second equation by 2, solution (0, 2). C) Multiply first equation by 3 and second equation by 2, solution (-2, 0). D) Multiply first equation by -3 and second equation by 2, solution (0, -2).
Mathematics
2 answers:
omeli [17]3 years ago
7 0
The answer is D

2x - 3y =  6  multiply this by -3
3x - y = 2 Multiply this by 2

-6x + 9y = -18
6x  - 2y = 4           Add the 2 equations:-

7y = -14   so y = -2
Substitute y = -2 in second equation:-
3x - (-2) = 2
3x = 2-2 = 0  
x = 0

solution is (0,-2)
erastova [34]3 years ago
3 0

Answer:

d

Step-by-step explanation:

The step multiply x by 2 in the first equation and subtract the second equation will NOT produce a system with the same solution. The entire equation must be multiplied by 2.

Given a system of two equations in two variables, replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solutions.

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Systems of equations pls help!
timama [110]
Equation 1 + equation 2

3x-8y +(-3x+10y) = 9+(-15)
2y= -6
then y=-3

from equation 1
3x-8y=9
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8 0
3 years ago
What is the inverse function f(x)=2x +1
Neko [114]

The inverse function is f(x) = \frac{x - 1}{2}


You can find the inverse of any function by switching the f(x) value and the x value. Then solve for the new f(x) value. The result will be your inverse function. Below is the step-by-step process for solving this one.


f(x) = 2x + 1 ---> Switch the f(x) and x values

x = 2f(x) + 1 ---> Subtract 1 from both sides

x - 1 = 2f(x) ----> Divide each side by 2.

\frac{x - 1}{2} = f(x) ---> Switch the order so that it looks like a function.

f(x) = \frac{x - 1}{2}


And that would be your inverse function.

8 0
3 years ago
Which of these situations does not have quantities that combine to make 0?
alexgriva [62]

Answer:

<u><em>A. 4 cups of water are added to a mixture. Then 4 cups of flour are </em></u>

<u><em>added.</em></u>

Step-by-step explanation:

<em>While all the rest have a positive and negative factor, answer a has 2 positives.</em>

4 0
3 years ago
Help Please will give brainliest!!!!!!!!!!!!!!!!!!!!!
GenaCL600 [577]

Answer:

its 4

Step-by-step explanation:

cam got it wrong because cam should have used -2 as his division since the factor was x-3  to be specific in the fator x is a positive but the 2 is a negative but he put a positive 2

5 0
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Gennadij [26K]

I hope this helps you

4 0
3 years ago
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