Answer:
53 mins
Step-by-step explanation:
2. 6a+7 thats the answer for two
To get 7 from 3 is to add 4
to get 11 from 7 is to add 4, etc.
so 5 -> 9 because 5+4
answer is D
100 cm = 1 meter
210 cm = 2.1 meters (multiply both sides by 2.1)
Mary uses 2.1 meters of thread so far, meaning she has 10-2.1 = 7.9 meters left
7.9 meters = (7.9 m)*(100 cm/1 m) = 790 cm
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Alternate route:
10 meters = (10 m)*(100 cm/1 m) = 1000 cm
Mary uses 210 cm out of 1000 cm total, so she has 1000-210 = 790 cm left.
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<h3>Answer: 790 cm</h3>
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