Answer:
(See explanation for further details).
Step-by-step explanation:
C) The linear system is:



After some algebraic handling:



By direct substitution:










D) The parameter values are:
,
, 
E) The quadratic equation is 
Answer: 
<u>Step-by-step explanation:</u>



Answer:
79
Step-by-step explanation:
because i said so
Answer:
r=21
Step-by-step explanation:
r-15=6
r=6+15
r=21