Answer:
radians
Step-by-step explanation:
Perimeter = 2(a+b)
= 2(2.8+16.5)
=2(19.3)
Perimeter = 38.6
Area=base x height
=2.8 x 11.5
=32.2
x=-4
Cross multiply to get:
3x=4(x+1)
3x=4x+4