The answer is 
*Remember x=
You are technically dividing in this, whenever you divide anything with exponents, you subtract them. 
Therefore, the x's would cancel out, leaving just 
4 x 12 is 48 and then plus 20 is 68
ANswer to 1 is 68.
4 hours for 68 miles
Answer:
what answers
Step-by-step explanation: