2.8a^2=55
a^2=55/2.8
a= square root of 55/2.8
10 + (-5) = 10 - 5 = 5
-11 + 20 = 20 + (-11) = 20 - 11 = 9
102 + (-1) = 102 - 1 = 101
<span>-20 + 60 = 60 + (-20) = 60 - 20 = 40</span>
Usually you use addition to find a sum.
Answer: 5 is the degree
Step-by-step explanation:
