Which of the following constants can be added to x^2 - x to form a perfect square trinomial?

1/4
1/2
1

11123355543321112345566444

My mom is mom like a 55

$250 deductible means jane must pay the first $250 of her bill. so the insurance company paid = (80% of bill) - deductible = (0.8 x $2550) - $250 = $2040 - $250 = $1790 and jane's cost is = (bill) - (insurance payment) = $2550 - $1790 = $760