To find this:
You know (B+C) = 7. Therefore you know (A+A )= 21 - (B+C). Therefore 21-7 = 14.
So now you know (A+A) = 14. So you divide (A+A)/2.
This equals 7. Therefore A = 7.
It is an expression and a term that are of equal value
Commutativity.
The existence of the additive inverse (of ab).
That depends on the value of CD and the perimeter of the quadrilateral out lined in the question
15
BS
yes because ab plus bc is ac
It is an expression and a term that are of equal value
x = ab x = 21*37 x = 777
Commutativity.
The existence of the additive inverse (of ab).
That depends on the value of CD and the perimeter of the quadrilateral out lined in the question
associative property
the midpoint of AB.
C minus B equals AB
15
ab=1a+1b a is equal to either 0 or two, and b is equal to a