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Sagot :
Answer:
Step-by-step explanation:
Given question is incomplete; here is the complete question,
"Which system of equations has a solution of approximately (0.7, -1.4)?"
A). x - y = 2 and x + 2y = -2
B). x - 2y = -2 and x + y = 2
C). x - y = 2 and x - 2y = -2
D). x + y = 2 and x + 2y = -2
"If the given point (0.7, -1.4) is the solution of the system of equations, it will satisfy both the equations"
To check whether the statement given above is true or false we will substitute the values of x and y in the given equations,
A). x - y = 2
0.7 - (-1.4) = 2.1
≈ 2
x + 2y = -2
0.7 + 2(-1.4) = -2.1
≈ -2
True.
B). x - 2y = -2
0.7 - 2(-1.4) = 3.5
x + y = 2
0.7 - 1.4 = -0.7
False.
C). x - y = 2
0.7 - (-1.4) = 2.1 ≈ 2
x - 2y = -2
0.7 - 2(-1.4) = 3.5
False.
D). x + y = 2
0.7 - 1.4 = -0.7
x + 2y = -2
0.7 + 2(1.4) = 3.5
False.
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