Question

Help!! ASAP!! Which ordered pair(s) are solutions to 3x − y = 1? Select all that apply.
A. (−2, −7)
B. (−1, −4)
C. (0, 1)
D. (3, 8)

Answer 1

Answer:

A, B, and D

Step-by-step explanation:

Substitute all the coordinates into the equation. (x, y)

3(-2) - (-7) = 1

-6 - (-7) = 1

1 = 1

3(-1) - (-4) =1

-3 - (-4) = 1

1 = 1

3(0) - (1) = 1

0 - (1) = 1

-1 does not equal 1

3(3) - (8) = 1

9 - (8) = 1

1 = 1

Answer 2

The ordered pairs which are solutions to the equation 3x − y = 1 are:

• Choice A. (−2, −7)
• Choice B. (−1, −4)
• Choice D. (3, 8)

By testing;

For A. (−2, −7); we have;

• 3(-2) − (-7) = 1

• -6 + 7 = 1

• 1 = 1 ..... Solution

For B. (−1, -4); we have;

• 3(-1) − (-4) = 1

• -3 + 4 = 1

• 1 = 1 ..... Solution

For C. (0, 1); we have;

• 3(0) − (1) = 1

• 0 - 1 = 1

• -1 = 1 ..... No Solution

For D. (3, 8)

• 3(3) - (8) = 1

• 9 - 8 = 1

• 1 = 1..... Solution

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