Answer:
x=9
Step-by-step explanation:
FE is 3x-7
since ΔABC≅ΔDEF the equivalent of FE is CB, or BC...which is 20
3x-7=20
3x=27
x=9
Suppose u = (1,2,3), v = (2, -3, -4), and w = (1,0,-2). (a) Find u-2v + 3w. (b) Write the vector (3,4,5) as a linear combination
marishachu [46]
<h2>
Answer with explanation:</h2>
We are given vectors u,v and w as follows:

(a)
Now we are asked to find the value of:

The value is calculated as follows:

Hence,

(b)
We are asked to represent (3,4,5) as a linear combination of u, v, and w.
Let:


i.e.



on multiplying equation(1) by 2 an then adding equation (1) to equation (3)

on putting the value of a in equation (2) we get:

Now on putting the value of a and b in equation (1)

Hence, we have:

Answer:
7
Step-by-step explanation:
<em>PLZ TELL ME IF IM WRONG</em>
Answer:
22.

23.

Step-by-step explanation:
To change the equation to polar form replace x with 
and y with 
The correct answer would be 130