Answer:
second
Step-by-step explanation:
Δ=3²-4*1*4=9-16=-7
To find x, substract 72 and 78 from 180 since all triangles are 180°
180 - 72 - 80 = 30
So x = 30
To find y, x and y equal 180 so subtract 30 from 180
180 - 30 = 150
y = 150
x = 30, y = 150
Answer:
3x + 6
Step-by-step explanation:
it literally says bc = 3x + 6
It would be A. 3z+7z.....
