Answer:
Step-by-step explanation:
In general, remember that the converse of
is
, therefore in this case 
so
The associative property of addition is shown in equations where the order in which the evaluation is made does not change the result, providing the numbers remain in the same order. Option B demonstrates this.
James runs 1 mile every 2 min. How many miles does he run every 3 mins?
Answer:
Step-by-step explanation:
Bringing like terms on one side
4x - x = 7 + 1/2
3x = 7.5
x = 7.5/3
x = 2.5