Solve the system using elimination. x + 2y = –6 3x + 8y = –20 (–4, –1) (–4, 4) (–1, –4) (3, 1)

 The required solution is  x = -4  and  y = -1.

Step-by-step explanation:  We are given to solve the following system of equations by the method of Elimination :

Multiplying equation (i) by 3 , we have

Subtracting equation (iii) from equation (ii), we get

From equation (i), we get

Thus, the required solution is  x = -4  and  y = -1.

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq

only 10/60 isn't equivalent

hope this : )