Answer:
I believe the answer would be C (sorry i messed uo the first time)
This one looks very tricky but ill try it out
Answer: 
Step-by-step explanation:
A line that cuts a circle at two points is called "secant".
There is a theorem known as "Intersecting Secant Theorem". This is the theorem you need to use to find the value of "d".
According the Intersecting Secant Theorem:

Having this expression, the next step is to solve for "d":
Use Distributive property:

Subtract 256 from both sides:


Divide both sides by 16:

The value of "d" rounded to the nearest tenth is:

Answer:
-32-p
Step-by-step explanation:
you combine the like terms which would be -21 and -11. that gives you -32 and -p is just by its self since there are no terms to combine it with