Answer:
The correct answer is OB.
Step-by-step explanation:
Let us recall the Associative Property of Addition: given three real numbers 
, 
and 
the following equality holds:
.
Let us remark that the Associative Property of Addition tells us that we can perform the sums in any order. So,
.
In the other options there was used the Commutative Property of Addition.
If solving for x you will first need to combine like terms. Then after getting the amount of numbers and amount of x numbers you will divide the x number from both. After doing that you would get X=-10
Answer:
y=2x+12
Step-by-step explanation:
Answer:
He will save $1.995 if he purchases it in the neighboring county
Step-by-step explanation:
Don's county:
Sales tax of 7.75%.
So he pays
399 + 0.0775*399 = $429.9225
Neighboring county:
Sales tax of 7.25%.
So he pays
399 + 0.0725*399 = $427.9275
Savings:
429.9225 - 427.9275 = 1.995
He will save $1.995 if he purchases it in the neighboring county
