Pls halp due today >_<. Thank you

<

Step-by-step explanation:

Step 1: Evaluate 2√40

2√40 = 12.6491

Step 2: Evaluate 7 + √63

7 + √63 = 14.9373

Step 3: Fill in inequality symbol

12.6491 < 14.9373

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