Now find the sum what 2 5/6 and 1 5/6

2 1/5 and 1 5/6= 2 6/30+1 25/30

I need HELP!!

Identify which functions are linear or non-linear. a. f(x) = x2 + 1 b. f(x) = 2x + 5 c. f(x) = x 2 + 3 d. f(x) = 3 x + 7 e. f(x) = 4x + 10 2 - 5

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a