If one is at a speed of 35 mph and the other 60, sum the speeds to work with just one number:
35 + 60 = 95mph
The formula for time is:
Time = Distance / Speed
Time = 855 / 95
Time = 9h (D.)
Hope it helped,
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Step-by-step explanation:
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1. Consider the expression 
Start with left side and use dustributive property :

This option is true.
2. Consider the expression 
Start with left side and use dustributive property :

This option is true.
3. Consider the expression 
Start with left side and use dustributive property :

This option is false.
4. Consider the expression 
Start with left side and use dustributive property :

This option is false.
Answer: A, B - true, C, D - false.