M∠ABC=180°
7x+x-4 = 180
8x = 180+4
8x=184
x=184:8
x=23
∠DBС = x-4 = 23-4 = 19°
Answer: 19°.
The most-specific name for such a polygon is square.
It can also be called a <em>rectangle</em>, <em>rhombus</em>, <em>parallelogram</em>, or <em>quadrilateral</em>.
Im not good at this, thought Ive done Geometry, But for the first one (180-70) which should be 110, and for the second one I would say 55.
Its line 1
if we expand the second and third expressions they come back to the first.
The last one is called the vertex form of a parabola
