so 47 or 57 is better then k7 or q7, and 57 non suited is playable k7 non suited is horrible. k7 suited it playable. 47 and 57 are good hands if its cheap and you hit 2 mor to your staight. with 57 ur drawing for a straight with 234689*4 = 24 cards as well as 3 5s and 3 7s.

so thats 30 cards for a flop with 57 ...learn value