All of these are considered characteristics of treasury bills or t-bills, except:
a. t-bills are "discounted" securities.
b. t-bills are sold in minimum units of $100, with additional increments of $100.
c. t-bills are sold in maximum units of $500.
d. all of these are considered characteristics of t-bills.

c. T-Bills are sold in maximum units of $500.

Step-by-step explanation:

T-Bills are sold in maximum units of $500 is not or will not be considered as a characteristic of Treasury Bill.

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18