Enter the equation in standard form.
y − 6 = −(x + 4)

Work Shown:

y - 6 = -(x + 4)

y - 6 = -x - 4

y = -x - 4 + 6 adding 6 to both sides

y = -x + 2

y + x = 2 adding x to both sides

x + y = 2

The equation is in standard form Ax+By = C, with A = 1, B = 1, and C = 2.

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm