The sum of the numbers is 20 10+10=20 20/2=10
Answer:

Step-by-step explanation:
{x -4y = −21
{8y - x = 45
_________

[Plug this back into both equations above to get the x-coordinate of 3]; 
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This is 16+85 i know it is becaout
Answer:
26.
Step-by-step explanation:
15% of 29.90 is 3.90
26+3.90= 29.90
12x12 + 12x12 = 288 = root of 288= 16.97