The total area of the surface of a three-dimensional object. Example: the surface area of a cube is the area of all 6 faces added together.
Answer:
117.5
Step-by-step explanation:
The answer to your question is:
27x³3y
20
2 x 20= 40 - 2= 38
i think that’s right?
Answer:
can also be expressed as a ratio of two integers.
Step-by-step explanation:
Assume x and y are rational number, then x and y can be written as:
, where a and b are integers and b≠0
, where c and d are integers and d≠0
Then,
= 
= 
Since the set of integers are closed under multiplication, a*d is also an integer. Similarly b*c is also an integer.
can be expressed as a proportion of two integers, provided that y≠0. From this we can conclude that is a rational number, which concludes that the set of rational numbers are closed under division.
