Answer:
40 Miles per Gallon
Explanation:
160 miles ÷ 4
-----------------------
4 gallons ÷ 4
=
40 miles
----------------------
1 gallon
gallon
= 40 miles per gallon
180 divided by 4.5 is 40 so the unit rate is 40 miles per gallon/ 40 over 1/ 40/1
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