The function g(x)=2^x. the function f(x)=2^x+k and k

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41

What is the solution to the equation below? 3/x-2+6=square root x-2 +8