Which equation shows the substitution method being used to solve the system of linear equations?

x – y = 7

x = y + 3

a) x = (7 – x) + 3

b) x – (y + 3) = 7

c) (y + 3) – y = 7

d) x – y = y + 3

Which composition of similarity transformations maps polygon abcd to polygon a'b'c'd'? a dilation with a scale factor less than 1 and then a reflection a dilation with a scale factor less than 1 and then a translation a dilation with a scale factor greater than 1 and then a reflection a dilation with a scale factor greater than 1 and then a translation

What is the distance between the points (2 -3) and (-6 4) on the coordinate plane

Ineed to know the answer to this algebra question.