Answer:
r= -5/3
Step-by-step explanation:
:Simplify both sides of the equation.
2+3r+3=0
(3r)+(2+3)=0(Combine Like Terms)
3r+5=0
3r+5=0
Step 2: Subtract 5 from both sides.
3r+5−5=0−5
3r=−5
Step 3: Divide both sides by 3.
3r
3
=
−5
3
r=
−5
3
Answer:
11.0 cm
P=38 cm
38/3=12.67cm length of one side
Base of triangle = 12.67/2 =6.34 cm
Use formula 

x = altitude of triangle
First one.
Its a straight line with a slope of 6.
A line with a slope of 6 has a form of:

So when
,
becomes
and so on.
Hope this helps.