Answer:
The solution is 
Step-by-step explanation:
You are given the system of three equations:

Multiply the first equation by 4, the second equation by 3 and subtract them. Then multiply the third equation by 2 and subtract it from the second equation:

So,

Multiply the third equation by 23 and subtract it from the second equation:

Hence,

Substitute it into the second equation:

Substitute them into the first equation:

The solution is 
Answer:330
Step-by-step explanation: LxWxH
10x9x2 +10x3x5=330cm
s + 5 + 5
= s + 10
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Answer:
Two angles are called supplementary when their measures add up to 180 degrees.
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