the sum of all the angles = 180
13x-11 + 8x-9 + 30x-4 =180
51x-24 = 180
51x = 204
x=4
w= 8x-9= 8×4-9
= 2e°
I believe the correct answer is “a5+2” or, like the question says to write it, “7 L(centimeters.)” this is because using the normal steps for equations, you add up how many “a”s you have total. Then you combine “-1 and +3”, which gives you positive 2. Then you add 5+2 which gives you 7. Hope this helped! :) please mark as Brainliest if the answer is correct!
Basically there are 3 addition properties and they are associative property, identity property, and commutative property.
Commutative property is just changing the order of the addends. Example: 26+19+34+21= 21+34+19+26
Identity Property is just adding a 0 to the number that doesnt change anything. Example: 26+19+34+21 +0 = 100
Associative property is just changing the grouping of the addends. Example: (26+19) + (34+21)
