The answer to the first one is A, the second one is 3.58333
Hello there!
If x = -3
Calculate x^2 - x
We need to replace x by 3
3^2 - 3
=3 * 3 - 3
= 9 - 3
= 6
I hope this helps!
Answer:
It is growing by five! have a good day
Step-by-step explanation:
Answer:
The magnitude of the given vector is 40.72 units.
Step-by-step explanation:
The given vector is ![v=-3\widehat{i}+40\widehat{j}+7\widehat{k}](https://tex.z-dn.net/?f=v%3D-3%5Cwidehat%7Bi%7D%2B40%5Cwidehat%7Bj%7D%2B7%5Cwidehat%7Bk%7D)
We know that for any vector 'r'
the magnitude is given by
![|r|=\sqrt{x^{2}+y^{2}+z^{2}}](https://tex.z-dn.net/?f=%7Cr%7C%3D%5Csqrt%7Bx%5E%7B2%7D%2By%5E%7B2%7D%2Bz%5E%7B2%7D%7D)
Comparing with the given vector we have
x = -3
y = 40
z = 7
Thus the magnitude equals
![|v|=\sqrt{(-3)^{2}+40^{2}+7^{2}}](https://tex.z-dn.net/?f=%7Cv%7C%3D%5Csqrt%7B%28-3%29%5E%7B2%7D%2B40%5E%7B2%7D%2B7%5E%7B2%7D%7D)
![|v|=40.72](https://tex.z-dn.net/?f=%7Cv%7C%3D40.72)
I havent done this stuff but I'm assuming x has to be equal to the number its being subtracted from so that the end result would be 0.