Pls help 6th grade math

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

The graph of g(x) is a translation of y = which equation represents g(x)?

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?