1000 ml costs £3.50
200 is 1/5 of 1000 so it will be £0.7
Answer:
4. 
5. 
6.
or 3.5
Step-by-step explanation:

Multiply those 2 values whose diagonal has both terms and divide by the term whose diagonal has the variable.

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Answer:
number 3 or 6 ^w^
your welcome for the help
4.5 hrs because 162.50-50 = 112.50
112.50/25= 4.5