210 - ( 30 * x )
**I assume the question asks for total minutes.

The value of the discriminant is
12.
Since the discriminant is greater than zero, the equation has
two real solutions.
Given:
The values are
.
To find:
The values of
and
.
Solution:
We have,

...(i)
Multiply both sides by 10.
...(ii)
Subtracting (i) from (ii), we get




And,



Now, the product of a and b is:


The quotient of a and b is:



Therefore, the required values are
and
.
Answer:
D?
Step-by-step explanation:
I think it is D since a universal set would only be {1,2,3,4,5,6,...} and the subset would not satisfy any of the conditions of symmetric, transitive, and reflexive.
You need to show me the model, so I can answer the question.