Answer:
2
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
Any value of
x
makes the equation true.
All real numbers
I think it’s 7. 7x7 =49 49-9=40
Answer: celestial body A is most probably a star.
Step-by-step explanation:
The sun is mostly composed of the elements hydrogen (H) and helium (He). By mass the composition of the sun is about 75 percent hydrogen and 25 percent helium. The sun is a star in our solar system and stars like the sun need a lot hydrogen for generating their enermous energy from fission of hydrogen atoms into helium atom.
Given:

Solution:
Here, we need to find the property illustrated by this equation.
It the given equation, we write (x+y) as (y+x).
According to the Commutative Property of Addition, if a and b are two real numbers, then

It means, Commutative Property of Addition is illustrated by the given equation.
Therefore, the correct option is b, i.e., Commutative Property of Addition.