Angles A and B are supplementary. The measure of angle A is 60° and the measure of angle B is represented by 3x. Which equation can be used to determine the value of x? The equations are
A. 60+3x=90
B. 3x+60=180
C. 60-3x=180
D. 3x=60

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.