The microphone was $126.
You would multiply $38 by 6 which equals $228.
Then do $354-$228 which equals $126.
It is B because angle DBA is supplementary to angle DBE because together they create a straight line which equals 180 degrees.
One number: x
Its consecutive: x + 1
Product:
x(x+1)=121
x² + x - 121 = 0
Δ = 1² - 4.1.(-121)
Δ = 1+484
Δ = 485
As square root of 485 is not integer, do not exist two consecutive numbers with product of 121
