X = 50 because x = number of text messages sent
0.2x+40=50
0.2x = 10
5(0.2x) = 5(10)
x = 50
Therefore, 50 text messages would have to be sent or received in order for the plans to cost the same each month.
Answer:
(A)A and C
Step-by-step explanation:
In each case, represent each of the
as a column vector where each row corresponds to the constant term, coefficient of t and
respectively.
A= The set where
![A=\left[\begin{array}{ccc}1&0&1\\0&0&5\\0&1&0\end{array}\right]](https://tex.z-dn.net/?f=A%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%260%261%5C%5C0%260%265%5C%5C0%261%260%5Cend%7Barray%7D%5Cright%5D)

B: The set where 
![B=\left[\begin{array}{ccc}0&0&0\\1&0&2\\0&1&5\end{array}\right]\\|B|=0](https://tex.z-dn.net/?f=B%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D0%260%260%5C%5C1%260%262%5C%5C0%261%265%5Cend%7Barray%7D%5Cright%5D%5C%5C%7CB%7C%3D0)
C: The set where 
![C=\left[\begin{array}{ccc}1&0&1\\0&0&5\\0&1&1\end{array}\right]\\|C|=-5](https://tex.z-dn.net/?f=C%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%260%261%5C%5C0%260%265%5C%5C0%261%261%5Cend%7Barray%7D%5Cright%5D%5C%5C%7CC%7C%3D-5)
Since the determinants of A and C are not 0, the set of vectors in A and C are linearly independent.
The answer would be the third one, all you are doing is substituting a value of 1 when you see an x in the function
30,000 + 9,000 + 5 which would equal = 39,005
Answer:
These are opposite because they are literally just facing in different directions so the answer is opposite.
Step-by-step explanation: