A certain arithmetic sequence has this explicit formula for the nth term: an = 12 + (n - 1)(5)
The same sequence has this recursive formula:
an = an-1 +
What number belongs in the blank space in the recursive formula?

answer: 0+0=0

step-by-step explanation:

that is the only answer that can make 0

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)