Answer:
8
Step-by-step explanation:

or

Step-by-step explanation:
Let the required number be x.
According to the given information:

Hence the required number is 31.
Answer:
36?
Step-by-step explanation:
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Answer:
The midsegment of a trapezoid is parallel to each base, and its length is one-half the sum of the lengths of the bases.
Step-by-step explanation: