Answer:

Step-by-step explanation:
observe
||a–b+c|| = ||a+b+c||
(a-b+c)² = (a+b+c)²
(a+b+c)² – (a-b+c)² = 0
((a+b+c)+(a-b+c))((a+b+c)–(a-b+c)) = 0
(2a+2c)(2b) = 0
(a+c)b = 0
a•b + c•b = 0
||a||×||b||×cos(π/8) + ||c||×||b||×cos(θ) = 0

Answer:

Step-by-step explanation:
We can use the pascal triangle to find the coefficients of the expasion of the cube. It holds that

Answer:
3 weeks for one song
Step-by-step explanation:
The function would be y = 3x + b
Answer:
$50.40
Step-by-step explanation:
Make an equation:
20%
------ = -------
63 100%
- 63 x 20= 1,260
- 1,260/100=12.6
- 63 - 12.6 = 50.40