Which value of x solves the equation cos x° = sin (20° + x°), where
0 < x < 90?

answer choices
a.30°
b.35°
c.40°
d.45°
e.55°

step-by-step explanation:

d

step-by-step explanation:

the two points from this line are   (0,4)   & (2,-2)

we can call

now, lets find the slope (m):

now finding b (the y intercept). this is the point at the y-axis where the line cuts the axis. looking at the graph, it is y = 4. so the point is 4. hence b = 4

the slope-intercept form is given by  

putting the points, we have:

d is the correct answer.