Question 7 Circle is shown
Z
Which statement explains why LA is a right angle?
А
B
ZA is a central angle that intercepts Y Z. Because the measure of Y Z is 180° it follows that m_A = (180°) = 90°
ZA is a central angle on diameter Y Z. Because the measure of AY Z A is 180°. it follows that m_A = { (180°) = 90°
ZA is an inscribed angle that intercepts Y Z. Because the measure of Y Z is 180°. t follows that m_A = {(180°) = 90°
LA is an inscribed angle on diameter Y Z. Because the measure of AY ZAis 180°, at follows that m_A = {(180°) = 90°
D

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

step-by-step explanation:

at each of the parallel lines adjacent angles are supplementary. the angles have special names identifying their positions with respect to the parallel lines and transversal. they are corresponding angles, alternate interior angles, or alternate exterior angles. an angles is congruent to its matched angle.