A) t(-3) = 1
b) t(1) = -3
c) t(3) = 5
d) t(0) = -4
Answer:
Part a) 
Part b) 
Step-by-step explanation:
step 1
Find the measure of angle ACB
we know that
The sum of the measures of interior angle of a triangle must be equal to 
so
In the triangle ABC



step 2
Find the measure of angle ACD
we know that
-------> by supplementary angles
we have

substitute


step 3
Find the measure of angle CED
we know that
m<DCE=m<ACB ------> by vertical angles
so

Remember that
The sum of the measures of interior angle of a triangle must be equal to 
so
In the triangle CDE



Step-by-step explanation:
x^2+(x+9)^2=90
x^2+(x+9)^2-90=0
x^2+x^2+9^2+2*x*9-90=0
x^2+x^2+81+18x-90=0
2x^2+18x-9=0