Answer:
R is reflexive
R is not symmetric
R is transitive
Step-by-step explanation:
R is reflexive.
To show this, we have to verify that for any pair of integers
.
But this is obvious because
and .
R is not symmetric.
To show it, we need to find two pairs and such that
but
For example (1,1) and (1,2).
for 1=1 and but
because
Finally, R is transitive.
If we take 3 pairs of integers and
Such that
and then
and
and
But then,
and
So
.
Answer:
x(x²+3)
x³+3x
Step-by-step explanation:
Hope it helps you
Answer:
To be honest I think its C but it may be A
Step-by-step explanation:
Answer:
(S,H) (R,E) K
Step-by-step explanation:
Answer:
Marc's age is 12
Step-by-step explanation:
Let
x ----> Marc's age
y ---> Tony's age
z ---> Ben's age
we know that
the sum of their ages is 40
so
-----> equation A
Marc is half as old as Tony
so
----> equation B
Marc is three times as old as Ben
so
----> equation C
substitute equation B and equation C in equation A
solve for x
therefore
Marc's age is 12