Question

Help help help fast plz plz this is graded

Answer 1

(2x)+ (x+90) = 180

3x + 90 = 180

180-90 = 90

3x = 90

x = 30

angle DBC = (30)+90

angle DBC = 120 degrees

Answer 2

120

Explanation:

First, you notice that both the angles add up to 180 degrees because it is a straight line. Therefore, 2x+x+90=180. Now you have an equation to solve! Subtract 90 from both sides and combine like terms. 3x=90. Therefore, x=30. Now you plug x back in to find out m<DBC. DBC=x+90 which is 30+90= 120.