Answer:
1a. Angle E is 15 because the three angles must equal 180 degrees
1b. x= 12, so angle D would be 50 degrees
1c. The triangle is an equilateral triangle
2a. y=-2/3 + 4
2b. It is perpendicular because the slope is negative reciprocal
2c. You can draw the line, but the equation is
y= x/2 + 5
2d. y= -2x + 11