(0.4)² = (0.4).(0.4) = 0.16
His error is, instead of raising (0.4) to exponent 2, he multiplied (0.4) by 2 , obviously which is wrong
60 i believe is the correct answer
3-3*6+2 = -13
And it is a correct solution
Answer:

Step-by-step explanation:
1. 
2. 
3. 
4. 
(10 + a / 2, 2 + b / 2) = (8, 1)
10 + a / 2 = 8
10 + a = 16
a = 6
2 + b / 2 = 1
2 + b = 2
b = 0
so V(6, 0)