Answer:
a15 = 35
Step-by-step explanation:
Given:
a3 = 11
a6 = 17
Find:
a15 = ?
Computation:
a3 = 11 ⇒ a+ 2d = 11..........Eq1
a6 = 17 ⇒ a + 5d = 17...............Eq2
From Eq2 - Eq1
⇒ 3d = 6
⇒ d = 2
And a = 7
So,
⇒ a15 = a + 14d
⇒ a15 = 7 + 14 (2)
⇒ a15 = 7 + 28
⇒ a15 = 35
It is hard to tell your precise intention. Choose the appropriate interpretation.

Answer:
9x²-3x-25, Domain is all real numbers
Step-by-step explanation:
f(g(x)) = 3(3x²-x-10)+5
= 9x²-3x-30+5
= 9x²-3x-25
Domain is all real numbers