It doesn't change because to add fractions, you need a common denominator. To find it, they multiplied 1/3 by 2 to make 2/6, to add to the 3/6.
Answer:

second

Step-by-step explanation:
We know that dividing by 0 is impossible.
Therefore, the denominator of the expression must be different from 0.



Answer:
87.0454545455
Step-by-step explanation: This is hard to explain on this text box. Please go to this https://www.wikihow.com/Do-Long-Division. Remember, always put a decimal point at the end. If you run out of number and you have a number left over. Keep adding zeros to the dividend.
Answer:
B) x+(2x+5)=29
Step-by-step explanation:
Micah = x
Aria =2x+5
x+(2x+5)=29