Does anyone know the answers to this?

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?