Which equation does the graph of the systems of equations solve?
2 linear graphs. they intersect at 1,2
x + 4 = −2x − 1
x + 2 = −3x + 1
−x + 3 = 3x − 1
x + 3 = 2x − 1

The correct option is 3.

Step-by-step explanation:

It is given that two linear graphs intersect at (1,2). It means the solution of both lines is x=1 and y=2.

The equation which is satisfied by x=1 will be the required equation.

In option (1),

Substitute x=1.

Option 1 is incorrect.

In option (2),

Substitute x=1.

Option 2 is incorrect.

In option (3),

Substitute x=1.

Option 3 is correct.

In option (1),

Substitute x=1.

Option 4 is incorrect.

Therefore the correct option is 3.

the answer is 510

step-by-step explanation:

15 • 13 = 195

15 • 12 = 180

15 • 5 = 75

12 • 5 = 60

195 + 180 = 375

375 + 75 = 450

450 + 60 = 510