Answer:
-1
Step-by-step explanation:
not sure if the equation is 3-4m or 3-4 but it's -1 if the equation is 3-4
Answer:
422 cm²
Step-by-step explanation:
Surface area of the composite figure = (surface area of the upper cuboid + surface area of lower cuboid) - 2(base area of the lower cuboid)
Surface area of composite figure = 
Upper cuboid has the following dimensions:

Lower cuboid has the following dimensions:

Plug these values into the formula
Surface area of composite figure




Surface area of composite figure = 422 cm²
Answer:
x=2
y= -3
Step-by-step explanation:
3x+2y=0 2y=-3x, y=-3x/2
3x-15y=51
substitute y
3x-15(-3x/2)=51
3x+45x/2=51
multiply by 2
6x+45x=102
51x=102
x=2
y= -3
4(x+a)= -48
Divide both sides by 4
(X + a) = -12
X being "a number"
The picture is completely black:/