What is the recursive rule for the sequence? 1.2, 0.4, −0.4, −1.2, −2, …

an=a n−1 + 0.8 , where a1=1.2
an=a n+1 + 0.8 , where ​ a1=1.2
an=a n+1 − 0.8 , where ​ a1=1.2
an=a n−1 − 0.8 , where ​ a1=1.2

it would be:

c.parallelogram.

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

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2

360/29

step-by-step explanation: