Answer:
While x = -7 and y = 4, x² - 3xy = 133.
Step-by-step explanation:
x² - 3xy
Substitute variables.
(-7)² - 3(-7)(4)
Square -7 remembering that (-x)² = x².
49 - 3(-7)(4)
Multiply -7 and 4.
49 - 3(-28)
Multiply -3 and -28.
49 + 84
Add 49 and 84.
133
Answer:
The vector is
.
Step-by-step explanation:
We can determine the equivalent vector (
), dimensionless, by means of the following formula:
(1)
Where:
- Original vector, dimensionless.
- Norm of the original vector, dimensionless.
- Norm of the new vector, dimensionless.
The norm of the original vector is determined by the following definition:
(2)
If we know that
, then the norm of the original vector is:


If we know that
, then the new vector is:


The vector is
.
Answer:

Step-by-step explanation:

Step-by-step explanation:
the integer that represents the opposite of a gain of 400 = - 400