Question 7 (Essay Worth 5 points) (08.03)Consider the following pair of equations:
y = -2x + 8
y = X-1
Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.

x=3

Step-by-step explanation:

Why? well this is simple. Just subtitute x-1  into y in the equation above.

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°