Question

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Answer 1

Answer:all of them are a solution

i think if u get it wrong then i am sorry

Answer 2

Answer:

Only (-3, -2) is a Solution, none of the others is a Solution.

Step-by-step explanation:

System of equations given:

-3x + 2y = 5 . . . . . . . . . . . . . . . . . . . (i)

2x - 7y = 8 . . . . . . . . . . . . . . . . . . . . (ii)

Ordered pairs to be tested for solution are:

(4, 0)

Equation (i): L.H.S. = -3x4 + 2x0 = -12 ≠ R.H.S

∴ (4, 0) Is Not a Solution

(5, 4)

Equation (i): L.H.S. = -3x5 + 2x4 = -15 + 8 = -7 ≠ R.H.S

∴ (5, 4) Is Not a Solution

(-3, -2)

Equation (i): L.H.S. = -3x(-3) + 2x(-2) = 9 - 4 = 5 = R.H.S

Equation (ii): L.H.S. = 2x(-3) - 7x(-2) = -6 + 14 = 8 = R.H.S

∴ (-3, -2) is a Solution

(-7, -8)

Equation (i): L.H.S. = -3x(-7) + 2x(-8) = 21 - 16 = 5 = R.H.S

Equation (ii): L.H.S. = 2x(-7) - 7x(-8) = -14 + 56 = 42 ≠ R.H.S

∴ (-7, -8) Is Not a Solution