Somebody please help meee and get the correct answer cause if you give me the correct answer you get brainlist Answer ASAP

Add the fractions and simplify 1/2+ 1/3

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.