Answer:
None of them
Step-by-step explanation:
A polynomial must have a pronumeral that is to the power of an integer, and you can't divide by a variable such as 2/x so for
a) there is a 
which means it's not a polynomial as is the same as 
b) The second term is being divided with a variable so that can't be a polynomial
c) There is a 
so it can't be a polynomial
d) There is a 
so it can't be a polynomial
Can i have brainliest hehehe......
Answer:
C=$(4.30xy+5.40(xz+yz))
Step-by-step explanation:
Surface Area of a Cuboid=2(LW+LH+HW)
Since the top is open
Surface Area = LW+2(LH+HW)
If Length = x feet,
Width =y feet
Height = z feet
Surface Area = xy+2(xz+yz)
Area of the base=xy
If it costs $4.30 per square foot to build the base
Cost of the base=Cost Per Square Foot X Area = $4.30xy
Area of the sides =2(xz+yz)
If it costs $2.70 per square foot to build the sides
Cost of the sides=Cost Per Square Foot X Area of the sides
= 2.70 X 2(xz+yz)
=5.40(xz+yz)
Cost of Constructing the Box = Cost of Constructing the Base + Cost of Constructing the Sides.
Therefore,
C=$(4.30xy+5.40(xz+yz))
Answer:
a
Step-by-step explanation:
replace x with -7
