Which expression is represented by the diagram?

10 negative tiles. 4 are crossed out.
Negative 6 minus (negative 4)
Negative 6 minus 4
Negative 10 minus 4
Negative 10 minus (negative 4)

D!

Step-by-step explanation:

10 negative tiles (-10) 4 are crossed out (4)

-10-(-4) = -10+4 = 6

please mark brainliest and have a great day!

A!

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