Throughout this, I'm assuming that the scale is: 1 square = 1
Not 100% sure if my answers are correct.
Question 1:
The x coordinate must be 2 and the y coordinate must be -1.
Question 2:
The x coordinate would be -2 and the y coordinate would be -1.
Answer: the solution is (-2.5,8.5)
Step-by-step explanation:

Multiply 4 or
on both sides to get c by itself
c ≤ 16
(A) .05 of a meter, or 1/20 of a meter.
(B)5 centimeters
(C) 1/20 of a ton
(D) 100 pounds
She will need to sell 18 necklaces a month to reach 1650