In △ABC, m∠A = x°, m∠B = (2x)°, and m∠C = (6x + 18)°. What is the value of x?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Me i'm timed right now! a. (0,-5)b. (0,-3)c. (0,3) d. (0,5)

Which of the following transformations will make coincide with ? a. counter-clockwise rotation 90º about a, followed by a translation 5 units to the right b. translation 5 units to the right, followed by a reflection across the y-axis c. translation 5 units to the right, followed by a reflection across the x-axis d. translation 1 unit up and 5 units to the right, followed by a reflection across the x-axis