Step-by-step explanation:

X^2-10x+25 = (x-5)^2 or (x-5)(x-5)
Answer:
y = x + 5: x=y−5
2x + y = 17
: x=-1/2y+17/2
Step-by-step explanation:
I do not exactly know what you were asking but I just answered the questions, if that is not what you were looking for tell me so I can try and edit my answer
A. $1250; $1500 because if you bought something for $1250 and sold it for $1500 you would be gaining $250