Find the measurement of BC.

Need help please- and also explanation.

Find the value of x for which the lines are parallel.

Which of the following describes the graph of y--4x-36 compared to the parent square root function? stretched by a factor of 2, reflected over the x-axis, and translated 9 units right stretched by a factor of 2, reflected over the x-axis, and translated 9 units left stretched by a factor of 2, reflected over the y-axis, and translated 9 units right stretched by a factor of 2, reflected over the y-axis, and translated 9 units left save and exit next submit

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is