Answer:
0.
Step-by-step explanation:
-6 4/5 + 6 4/5 equals zero.
1/6
2/3 times 1/4 is 2/12. 2/12 simplified is 1/6, so 1/6 is your answer.
c≈15.07
c=a2+b2=11.12+10.22≈15.07481