Answer:
84.87sq ft
Step-by-step explanation:
Let ABC be the triangle and AD be the perpendicular on BC such that BD=DC=7ft.
Now, it is known that 


Now, in triangle ADC, we have




Now, area of the triangle=
=
=
Thus, area of the building is 84.87sq ft.
Answer:
-3
Step-by-step explanation:
-12(x-12)=-9(1+7x)
-12x+144=-9-63x
-12x+63x=-9-144
51x=-153
x=-153/51=-3
Answer:
wasn't sure what you wanted us to answer, so I have the distance formula for you, and I worked it out.
Step-by-step explanation:
hope these help (:
Dont u think their should be more points for 4 hard questions