Question

Which system of equations has a solution of approximately (0.6, –0.8)? (cont.)

Answer 1

Answer:

Required equation is x + 2y = -1

Step-by-step explanation:

Given Solution: ( 0.6 , -0.8 )

We have to system of equation whose solution is given.

Option 1).

From Solution,

x = 0.6   and   y = -0.8

equations: x + 2y = -1

LHS = x + 2y = 0.6 + 2 × (-0.8) = 0.6 - 1.6 = -1

RHS = -1

LHS = RHS

So, This option is correct.

Option 2).

From Solution,

x = 0.6   and   y = -0.8

equations: 3x - y = -1

LHS = 3x - y = 3 × (0.6) + (-0.8) = 2.4 - 0.8 = 1.6

RHS = -1

LHS ≠ RHS

So, This option is not correct.

Therefore, Required equation is x + 2y = -1

Answer 2

The solutions are x+2y=-1 because -1=-1, x+2y=-1 because -1=-1 .