The answer to this problem would be:
0.279 x 53 = 14.787
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.
Ask your teacher or a family member
Answer:
$210
Step-by-step explanation:
9.50*4= 38
5*2=10*4=40
3*4= 12
4*4= 16
26*4= +104
---------
210