Name the property shown by each statement
(4h + 12) + 9c = 9c + (4h + 12)
substitution property of equality

commutative property of addition

additive identity

associative property of addition

Step-by-step explanation:

The given expression is

Observe that the equality is between the same terms but switched.

This expression is demonstrating commutative property of addition, which states that no matter the order of terms, the sum is always gonna be the same.

Therefore, the right answer is the second choice: Commutative Property of Addition.

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: