Which one of these strategies would eliminate a variable in the system of equations 8x+5y=-7, -7x+6y=-4
2 answers:
For this case we have the following system of equations:
If we want to solve the system by the "elimination" method, we must multiply some (or two) of the equations by a number such that when one is added, one of the variables is eliminated.
Multiplying by 6 the first equation we have:
Multiplying by -5 second equation we have:
If we add both equations, the variable y is eliminated.
We can also multiply the first equation by 7:
We multiply the second equation by 8:
Adding the equations eliminates the variable x.
Answer:
One strategy may be to multiply the first equation by 7, the second equation by 8 and add.
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Answer: OPTION B
Step-by-step explanation:
The equation of a line that passes through the origin is the following:
Where "m" is the slope of the line.
By definition, Proportional relationships have the following form:
Where "k" is the Constant of proportionality.
Then, as you can notice, if you graph a Proportional relationship you will get a line that passes through the origin.
Therefore, based on the explained above, you can conclude that the option that shows a function that represents a Proportional relationship is the Option B.
Then, this is: