3.
the following diagram shows the triangle abc.
13.6
5
diagram not to scale
the angle at c is obtuse, ac = 5 cm, bc = 13.6 cm and the area is 20 cm.
(a)
find acb.
ac 5
sohcah to a
ārtet
b
700m2
a yoabotn c
als usine
(b)
find ab.
(3)
(total 7 marks)

To simplify the equation, Erika must isolate the x. This means to get the x by itself. In order to do so, Erika needs to divide 50x by fifty to undo the multiplication. What is done on on side, must be done on the other by the Division Property of Equality. Therefore, Erika must divide seventeen by fifty as well. The answer Erika should end up with is x=0.34