No. You can only add variables that have the same exponents. Also, during addition of variables with the exponent, you do not add the exponents.
Answer:
1)- 2/6=-1/3 2)3
Step-by-step explanation:
All you would need to do is multiply $140 by 3% and you would get $4.20 step by step 140x0.3=4.20 or 140x3%=4.20