A line / passes through the point (-2, 5) and intersects the axis of the y at the same point as the line y = 3x-4. What is the e
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Answer:
(x, y) = (-4, -15)
Step-by-step explanation:
Perhaps you want the solution to ...
y = 3/4x -12
y = -4x -31
Equating the two expressions for y gives ...
3/4x -12 = -4x -31
3/4x = -4x -19 . . . . . add 12
3x = -16x -76 . . . . . multiply by 4
19x = -76 . . . . . . . . . add 16x
x = -76/19 = -4 . . . . divide by 19
y = (3/4)(-4) -12 = -15 . . . . use the first equation to find y
The solution to this system of equations is ...
(x, y) = (-4, -15)
To find this answer, we need to multiply 3.57 by 12.
Therefore, 12 planks will cost $42.84.
Therefore, 12 planks will cost $42.84.
