Subtract the right side and you have
x² -10x -6 -2x -1 = 0
x² -12x -7 = 0
This corresponds to the selection ...
C. x² -12x - 7 = 0
My best guess would be d.
ax+by=20
a represents how many first items you bought
x represents the cost of the first item
b represents how many second items you bought
y represents the cost of the second item
Answer:
Step-by-step explanation:
number of ways=6×5×4=120