HELP ASAP PLEASE!!!! I’m really confused


1.Evaluate: If a= 42 and b=2, then find ab

-84
-40
-21
-20

2.the sum of 1 and 6, divided by 7.

-(1+6)/7
-1/7+6
-1-6/7
-1+6/7

3. Write an algebraic expression for the the words phrase. 40% of X

-0.40/x
-0.40+m
-0.40x
-0.40-m