The first four terms of a sequence are shown below. 18, 25, 32, 39,...
Which explicit expression can be used to find the nth term of the sequence?
A. 18 + 7n
B. 18 + 7(n-1)
C. 7 + 18n
D. 7 + 18 (n-1)

answer: 0,6

step-by-step explanation:

this would make it the y intercept.

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.