one of the steps dave used to solve an equation is shown below.
3x+9=21
3x+9-9=21-9

which statement describes the procedure dave used in this step and identities the property that justifies the procedure?

a) dave rearranged the terms. this procedure is justified by the commutative property.

b) dave subtracted 9 from both sides. this procedure is justified by the additive property of equality.

c) dave rearranged the terms. this procedure is justified by the associative property.

d) dave subtracted 9 from both sides. this procedure is justified by the additive inverse.

each side has a different length.  

step-by-step explanation:

stew reads at the fastest rate of 265 words per minute.

step-by-step explanation:

it's a given that felicia reads at 260 word per minute and on connie's graph we can see that she reads 200 words per minute. since stew's table tells us that he read 795 in 3 minutes, we can divide 795 by 3 to find out how many words he reads per minute.

795/3 = 265

stew reads 265 words per minute - he reads at the fastest rate since felecia reads at 260 words per minute and connie reads at 200 words per minute.

stew (265) > felecia (260) > connie (200)

8

step-by-step explanation: