Answer:
I thinks its T (3)
Step-by-step explanation:
If u= (u1,u2,u3) andv= (v1,v2,v3), then the dot product of u and v is u·v=u1v1+u2v2+u3v3. For instance, the dot product of u=i−2j−3kandv= 2j−kisu·v= 1·0 + (−2)·2 + (−3)(−1) =−1.
Properties of the Dot Product.
Let u,v, and w be three vectors and let c be a real number. Then u·v=v·u,(u+v)·w=u·w+v·w,(cu)·v=c(u·v).
Further, u·u=|u|2.
Thus, if u=0is the zerovector, then u·u= 0, and otherwise u·u>0.1
Orthogonality Two vectors u and v are said to be orthogonal(perpendicular), if the angle between them is 90◦.Theorem. Two vectors u and v are orthogonal if and only if u·v= 0.
Answer:
<u>Slope = 3</u>
Step-by-step explanation:
The slope is the Rise/Run
Given the two points (-1,-4) and (2,5) we can calculate both the Rise and the Run:
Rise = (5 - (-4)) = 9
Run = (2 - (-1)) = 3
Slope is Rise/Run
(9/30) = 3
It is the "m" in y = mx + b
The actual equation is y = 3x + 1. Use one of the 2 points and solve for b to find that it equals -1.
y = 3x - 1 for (2,5)
5 = 3(2) - 1 ?
5 = 5 Yes
Answer:
5. mCD is 27.8° | 7. mAFC 52.3° |
Step-by-step explanation:
