Answer:
838
Step-by-step explanation:
556 - ( - 282 )
= 556 + 282
= 838
556--282 negative minus a negative is a positive
Pythagoras theorem:
80^2+39^2 =x^2
square root of 7921 = square root of x^2
x=89
5(13×3)+49
×5 ×5
65×15+49
975+49
1024
The second one is the answer
2118+3391+4785+6354= 16648