c) prove that the angles ros and soq are
supplementary.

The Proof is given below.

Step-by-step explanation:

Supplementary Angles:

Supplementary angles are those angles when they add up to 180°.

Example: 37° and 143° are supplementary angles. Because the sum is 180°

Given:

∠ ROS and ∠ SOQ are two angles with OS as a common ray as shown in the figure.

To Prove:

∠ ROS + ∠ SOQ = 180°

Proof:

In the figure R-O-Q is a straight line.

Ray OS is common arm to both the angles that is ∠ ROS and ∠ SOQ.

Now In Linear Pair postulate, a straight line forming two adjacent angles with common vertex and one common ray then the sum of two adjacent angles is 180°

Here the straight line is R-O-Q

common vertex O

common ray OS

∴

As the SUM of both the angles is 180° therefore they are supplementary angles.

y-y1=4(x-x1)

step-by-step explanation:

this is point-slope form since you only have 4 as the slope it goes in place of m

hope this : )