Answer:
A. {4,3}
Step-by-step explanation:
x -2y = -2
y = - 3x +15
x - 2(-3x+15) = -2
x +6x - 30 = -2
7x = 28
x = 4
y = - 3x +15 = - 3*4 + 15 = -12 + 15 = 3
{4,3}
Answer: 90
Step-by-step explanation:
45.5-.5=45
45^2=90

The given pair of angles are vertical opposite angle pair so, they are equal. i.e