Answer:

Step-by-step explanation:
Given


Required
Eliminate a
Multiply the first equation by -4

Add to the second equation

Solve brackets

Open bracket


At this point, a has been eliminated;
From the list of given options, the option that answers the question is 
Answer:
Yeah its 7 because when you add 3+2=5, and x is 2, its 7
Mode is the total average median is the middle number
Yes, if you divide it by fractions of pi, then you would get even integers.