(+3) + ( -1) + ( -6) = (+7) + (+7) + (+9) = (+9) + ( -3) + (+5) = ( -8) + (+7) + (+4) =

(+2) + ( -7) + ( -7) = ( -5) + ( -3) + (+9) =

(+1) + (+1) + ( 0) = ( -7) + (+1) + (+8) =

(+7) + (+4) + (+2) = (+2) + (+8) + (+3) =

step-by-step explanation:

mean or average is 40.6

(2x + 16) + (x) = 180

step-by-step explanation:

given,

abcd is a quadrilateral inscribed in a circle

angle a is labeled x plus 16, (x + 16)

angle b is labeled x degrees, (x)

angle c is labeled 6x minus 4, (6x – 4)

angle d is labeled 2x plus 16, (2x + 16)

what equation can be used to solve for angle b?

we know that the sum of the opposite angles of a simple quadrilateral inscribed in a circle is 180 degrees.

angle b is opposite angle d

therefore, angle b + angle d = 180

(x) + (2x + 16) = 180 

same as (2x + 16) + (x) = 180