Answer:
S=-17
Step-by-step explanation:
-8s+4=-7s+21
-8S+7S=21-4
-S=17
S=-17
Two Angles are Supplementary when they add up to 180°.
∠1 and ∠4
∠4 and ∠5
∠6 and ∠7
Other:
∠2 and ∠3
∠1 and ∠8
∠8 and ∠5
Your y-intercept is (0,4.5). Two other points where the linear equation intercepts are (2,7) and (-6,-3). Plot these three points on the graph.