9x - 2 = 67
67 + 2 = 69
69 × 9 = 621
621 = x
Answer: I’m pretty sure it’s 5
Step-by-step explanation:
Answer:
16 years old
Step-by-step explanation:
D=Damon N=Nora N=3D
3D-8=2D
D=8
Currently Damon is 8
I 8 years will be 16
Nora now is 24(8*3)
In 8 years will be 32 (3*8)
Answer:
Step-by-step explanation:
f(x)=(x+4)(x-4)(x-1)
=(x²-16)(x-1)
=x³-x²-16x+16
Answer:
Step-by-step explanation:
![y = sin(xy)\\\frac{d}{dx}y=cos(xy)(\frac{d}{dx}(xy))\\ \frac{d}{dx}y = cos(xy)(y + x*\frac{d}{dx}y)\\ write \: \frac{d}{dx}y \: as\:y'\\y' = cos(xy)(y+xy')\\y' = ycos(xy) + xy'cos(xy) \\y'-xy'cos(xy) = ycos(xy)\\y'(1-xcos(xy)) = ycos(xy)\\\\y' = \frac{ycos(xy)}{1-xcos(xy)}](https://tex.z-dn.net/?f=y%20%3D%20sin%28xy%29%5C%5C%5Cfrac%7Bd%7D%7Bdx%7Dy%3Dcos%28xy%29%28%5Cfrac%7Bd%7D%7Bdx%7D%28xy%29%29%5C%5C%20%20%5Cfrac%7Bd%7D%7Bdx%7Dy%20%3D%20cos%28xy%29%28y%20%2B%20x%2A%5Cfrac%7Bd%7D%7Bdx%7Dy%29%5C%5C%20write%20%5C%3A%20%5Cfrac%7Bd%7D%7Bdx%7Dy%20%5C%3A%20as%5C%3Ay%27%5C%5Cy%27%20%3D%20cos%28xy%29%28y%2Bxy%27%29%5C%5Cy%27%20%3D%20ycos%28xy%29%20%2B%20xy%27cos%28xy%29%20%5C%5Cy%27-xy%27cos%28xy%29%20%3D%20ycos%28xy%29%5C%5Cy%27%281-xcos%28xy%29%29%20%3D%20ycos%28xy%29%5C%5C%5C%5Cy%27%20%3D%20%5Cfrac%7Bycos%28xy%29%7D%7B1-xcos%28xy%29%7D)