Which choice shows 30 + 10 + 20 rewritten correctly using the commutative property and then simplified correctly? A.30 + 20 + 10 = 50 + 10 = 60.

B.30+10+10+10=40+10+10=50+10=60
C.30+20+10=50+30=80
D.30+10+10+10=40+10=50

A. 30+20+10=50+10=60

Step-by-step explanation:

The commutative property is the property of which you can rearrange the numbers around but the answer stays the same. From the original equation, you moved 20 and 10 around and added 30+20=50 then, you add 10 plus that 50 since you haven't done anything to the 10 yet. So, 50+10=60.

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step-by-step explanation:

descending order means to order the polynomials from the term with the largest exponent to the term with the smallest exponent.  

therefore, the correct answer is d.  

a variable is any characteristics, number, or quantity that can be measured or counted. a variable may also be called a data item. hope i !