∠abd and ∠dbc are adjacent complementary angles. if m∠abd=(3x+11)° and m∠dbc=(7x+19)°, identify the measure of ∠dbc. (i need a picture – clearly labeled showing both definitions of complementary and adjacent) (i also need an equation set up, correct algebra process, measure of ∠dbc)

720

step-by-step explanation:

first i did work 2nd i did work and 3rd i did work

it would open into a square depending on the type of envelope i’m not sure about the second part

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an = 22 + (n-1) *6

110 seats

step-by-step explanation:

an=a1+(n-1)(d)

a1 = 22   this is the first item in the sequence

d =6   this is how the sequence goes up

a)   an = 22 + (n-1) *6

b) a12 = 22 + (12-1) *6

    a12 = 22+11*6

  a12 = 22 +88

  a12 = 110