The recursive formula for an arithmetic sequence is f(n+1)=f(n)+4; f(0)=-2

which of the following equations are linear models for this sequence? select all that apply.

a
y=4x-2

b
y=-2x+4

c
f(n)=-2n+4

d
f(n)=4n-2

B

y=-2x+4

C

f(n)=-2n+4

Step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.