Answer:
3*x-9
Difference means subtraction and times means multiplication!
Answer:

Step-by-step explanation:

the first side is
twice x
2 times x
the symbol means less than or equal to
and finally we have the -18
Answer:
AP = 10
Step-by-step explanation:
According to secant-secant theorem
(PB)(AP)=(PD)(PC)
6(AP) = (5)(12)
AP = 60/6
AP = 10
7^2 + 9^2 = 130
Square root of 130 is about 11.4