Answer:
x = -2/15.
Step-by-step explanation:
Finding the second derivative:
f'(x) = 15x^2 +4x - 3
f"(x) = 30x + 4
30x + 4 = 0 for a point of inflection
x = -4/30 = -2/15
So 30x + 4 is negative up to x = -2/15 and positive thereafter.
So the curve passes from concave downward to concave upward at x = -2/15.
Answer:
9
√
2
Step-by-step explanation:
1. Rewrite 162 as 
⋅2
2. factor 81 out of 162
3. Rewrite 81 as
4. Pull the terms from under the radical
![\sqrt[9]{2}](https://tex.z-dn.net/?f=%5Csqrt%5B9%5D%7B2%7D)
I hope this helps :)
Linear because there is a constant change (+3)
Answer:
20
Step-by-step explanation:
<u>25 </u> = <u> x</u>
20 16
(25*16)/20 = 20
