Need help with number 2a and 2b will give crown

What is the result of adding the system of equations? 2x+y=4 3x-y=6

Asales representative from a local radio station is trying to convince the owner of a small fitness club to advertise on her station. the representative says that if the owner begins advertising on the station today, the club's total number of members will grow exponentially each month. she uses the given expression to model the number of club members, in hundreds, after advertising for t months.

The function representing david's miles per month if f(m)= 115m + 5. what does the 115 represent