I think #1 is -1/2 but im not sure i dont know about the other answers
Answer: 4 minus 12 x
Step-by-step explanation:

4 - 12x
Must do multiplication first....
-2/5 - 3/7 x 7/10
-2/5 - 21/70 (I'll reduce 21/70)
-2/5 - 3/10
Now you have to find a common denominator and subtract
-35/50 = -7/10......is what I get