Answer: 10^2 = x^2 plus 6^2
100= x^2 + 36
64=x^2
8
Step-by-step explanation:
It's closed under addition. You can take any two natural numbers you want, add them up and you'll get some other natural number (eg: 3 and 5 ---> 3+5 = 8)
it's not closed under subtraction. Sure 5-3 = 2 is a natural number but 3-5 = -2 is not a natural number
so that leads us to the answer being choice B
Answer:
Step-by-step explanation:
we know that
The algebraic expression is equal to
Remember that
and
so
substitute