4. Write the first five terms of the sequence defined recursively. Use the pattern to write the nth term of the sequence as a function of n. (Assume that n begins with 1.)
a1=5, an+1 = -an
a. an = 5n
b. Q, =(-5)"
C. Q, =(-5)n-1
d. a,=5(-1)"
e. a,=5(-1)-1

b.-4 units

all you   do is count how many times you move

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.

add them

step-by-step explanation:

idk you did not give the options or numbers so you cant solve it