Help me get B and C.​

Every triangle is 180 so subtract from 180 -36.5=143.5

Yo see b has a square which is equal to 90 so 143.5-90=53.5

B=90

C=53.5

D=36.5

Alll togethor gives 180

So ur ans is true

y=-2.5x+12.5

step-by-step explanation:

5y=2x+10

y=0.4x+2

slope=-2.5

5=-2.5*3+b

b=12.5

86

step-by-step explanation:

find the area of the triangle then multiply by 2 then add the area of the parollelegram multiplied by 2