(06.01)
If you were to use the substitution method to solve the following system, choose the
new equation after the expression equivalent to x from the second equation is
substituted into the first equation.
3x + 2y = -21
x - 3y = 4 (6 points)
1) 3(3y + 4) + 2y = -21
2) 31-3y + 4) + 2y = -21
3) 3x + 2(3y + 4) = -21
4) 3x + 2(-3y + 4) = -21

∠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°

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step-by-step explanation: