Answer:
51
Step-by-step explanation:
midpoint = (50 + 52)/2
= 102/2
= 51
What is - 4/5 times -5/7?
20/35 or in simplified form 4/7
22 houses can be cleaned in 11 hours.
Step-by-step explanation:
It is given that;
6 hours = 12 houses cleaned
1 hour = 
1 hour = 2 houses cleaned
In 1 hour, 2 houses can be cleaned, therefore,
11 hours = Time*houses cleaned in one hour
11 hours = 11*2 =22 houses cleaned
22 houses can be cleaned in 11 hours.
Keywords: unit rate, multiplication
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