this is neither a geometric nor an arithmetic sequence
add 4, add 6, add 8
Since you have options, I would guess and check
n=2
2^2+2 =6
3(2)-1 = 5 no
(2+1) (2+2) =12 no
Choice A
(5x-1)(x+2)=8x-4
5x²+10x-x-2=8x-4
5x²+9x-2=8x-4
5x²+x+2=0
use the quadratic formula, b²-4ac=1²-4*5*2=1-40=-39, -39 cannot be square rooted, so the equation has no real solution.
In 13, x=27.496
In 14, x=16.824
In 15, x=51.34°
<em />I did this in my head; it would take longer to write it out. I'll show you the trig if need be.
Answer:
Step-by-step explanation:
You can find your answer in attached document.
