The expression 12x+15x-11x can be combined because of which property a. commutative property of addition b. distributive property c. additive inverse property d. multiplicative property

Option A.

Step-by-step explanation:

Commutative property of addition says that if we add two or many numbers, order doesn't matter.

Let there are three numbers a, b, and c.

When we add them by commutative property, result will remain same.

If we add [(a + b)+ c] or [a + (b + c)], result will be same.

Therefore, 12x + 15x - 11x = (12 + 15 - 11)x

                                         = (27 - 11)x

                                         = 16x

Option A. Commutative property will be the answer.

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

answer: when you burn wood, the carbon reacts with the oxygen in the air to create ash and smoke. that is a permanent change you cannot undo that.

step-by-step explanation: