Answer:
sorry for my handwriting
i think this is the correct answer
Answer:
i think thats right
Step-by-step explanation:
Answer: y=0,5x²-x-1,5.
Step-by-step explanation:

We summarize (1) and (3):

Substitute b=-1 into (2):

From (5) subtract (4):

Substitute a=0,5 into (4):

Hense:
y=0,5x²-x-1,5.
Since it is mid-way you would multiply it by 2 so, 8x2=16
Your answer is 16.
Hope I helped <3