Answer:
Step-by-step explanation:
5x^4 + 10x^3 + 15x
5x ( x^3 + 2x^2 + 3)
Because line QS is outside the circle and only touches it at point S the line is a tangent line
Answer:
the biconditional is a true statement
Step-by-step explanation:
The absolute value of x is 9 if it's equal to 9.
(If this is wrong I'm sorry I haven't done this kind of math in a while!)

the decimals are commas and the double decimal is a real decimal
Answer:
See explanation
Step-by-step explanation:
6/4 = 1.5
10/4 = 2.5
Therefore the sequence is 1, 1.5, 2.5, 3
So the common difference is either 0.5 or 1