Answer:
Substitute 3x - 5 for y in the second equation.
Step-by-step explanation:
Generally, to solve the system of linear equations of x and y, the first step would be trying to eliminate x (or y).
Then turn the system into the equation of only y (or x).
Next, try to solve for y (or x).
Then substitute the solved y (or x) into the original system to work out x (or y).
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3 options (1 addition, 2 subtractions) do not eliminate x or y (x and y still exist after manipulation).
=> Remaining option relating substitution would be a reasonable choice.
Answer:
C.
Step-by-step explanation:
Choice A:

Choice B:
appears exactly the same as choice A simplified.
Choice C:
is not the same as A or B since x doesn't have power 4 and y doesn't have power 2.
Choice D:
is the same as A and B.
So the only odd ball is C.
Answer:5/3
Step-by-step explanation:
Slope = rise/run.
slope = change in y/change in x.
slope = (4-2)/(7-4)
slope = 2/3.