A system of equations is graphed on a coordinate plane. Which coordinates are the best estimate of the solution to the system of equations?

(−1, 0)
(−1, −1)
(1, 0)
(1, −1)

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?