Answer:
AB = 9, BC = 15
Step-by-step explanation:
Since, A, B, and C are collinear points, where B is between A and C. i. e. A - B - C


Answer:
All statements are true
Step-by-step explanation:
1. The statement
is true, because
is the sum of first 499 terms,
is the sum of first 500 terms, and all these terms are positive, then the sum of smaller number of terms is less than the sum of larger number of terms.
2. The statement
is true, because
is the sum of first 500 terms,
is 500th term and the sum of 500 terms is greater than the 500th term.
3. The statement
is true, because
is the sum of first 1 term that is exactly 
All statements are true.
Answer:
B
Step-by-step explanation:
We are given that <em>x</em> and <em>y</em> are functions of time <em>t</em> such that <em>x</em> and <em>y</em> is a constant. So, we can write the following equation:

The rate of change of <em>x</em> and the rate of change of <em>y</em> with respect to time <em>t</em> is simply dx/dt and dy/dt, respectively. So, we will differentiate both sides with respect to <em>t: </em>
<em />
<em />
Remember that the derivative of a constant is always 0. Therefore:

And by subtracting dy/dt from both sides, we acquire:

Hence, our answer is B.
639÷9=71. You can check your answer by doing 71x9=639