Answer: 
Step-by-step explanation:
For this exercise you need to remember the following formula:

Where "V" is the speed, "d" is the distance and "t" is time.
In this case, according to the information given in the exercise, you know that:
- James leaves his school at 3:15 and arrives at the park at 3:25. Then, you can identify that the time it takes him to go from his school to the park is:

- The park is 0.5 miles from James' school. Therefore, you can identify that "d" is:

So, knowing those values, you can substitute them into the formula:

Finally, evaluating, you get the following result:

The value of x based on the tangent-secant theorem is: <u> 19.</u>
<em><u>Recall</u></em>:
- The secant-tangent theorem states that when a tangent and a secant meet outside a circle, the product of the secant length and it's segment outside the circle is equal to the square of the tangent segment length.
- Applying the tangent-secant theorem or rule, we will have this equation:

AB = 
EB = 4


x = 19
Therefore the <u>value of x is 19.</u>
Learn more here:
brainly.com/question/9330100
Although I will not give an explanation, your answer is...
a = -6
Answer:
2140
Step-by-step explanation: