Afurniture set was purchased for $20,544, including a 7% sales tax.
what is the sales tax in dollar amount?

1438

Step-by-step explanation:

20,544 - 7% = 19105.92 (if rounded then 19106)

then do 20544 - 19106 (ROUNDED) = 1438

In dollar amount is

1,438.08

Step-by-step explanation:

20,544 + 7% = 21,982.8 and 21,982.8 - 20,544 = 1,438.08

step-by-step explanation:

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