Answer:
Step-by-step explanation:
m<ABC=90 because of Angle inscribed in Semicircle Theorem
Answer:
3x + 30
Step-by-step explanation:

3x + 30 would be an equivalent expression.
Hope this helps.
Answer:
linear
Step-by-step explanation:
Answer: isolate the variable
Step-by-step explanation:
A square matrix that is not invertible is called singular or degenerate.