Answer:
Step-by-step explanation:
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Good evening ,
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2(7) + 5(1) + 3(-3) = 10
3(7)  - (1) + 4(-3) = 8
5(7) -  2(1) + 7(-3) = 12 
Then (7,1,-3) is a solution to system 
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Answer:
0.987750947  miles
Step-by-step explanation:
first you find how many inches are in a mile and there are 63360 inches in a mile 
2nd  you minus 63360 - 776.1 = 62583.9 then you get 62583.9 and put it in  miles and your answer is 0.987750947  miles
 
        
             
        
        
        
About 88? people are present.
        
             
        
        
        
Answer:
Part A: 8b -12c -16
Part B: 4(2b - 3c -4)
Part C: 36
Step-by-step explanation:
Part A:
5b + 3c - 20 + 3b - 15c + 4
= 8b -12c -16
Part B:
Factorising 8b -12c -16
= 4(2b - 3c -4)
Part C:
= 4[2(2)-3(-3)-4)]
= 4[4+9-4]
= 4[9]
= 36
 
        
             
        
        
        
Answer:
Non linear. It is a curve not a line.