Complete the recursive formula of the geometric
sequence –0.25, -2, -16, -128,
b(1) =
b(n) = b(n − 1).

See below in bold.

Step-by-step explanation:

The common ratio is -2 / -0.25 = 8

b(1) = -0.25

b(n) =  8b(n - 1)

-0.25

8

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