Step-by-step explanation:
k² + 5k + 13 = 0
Using the quadratic formula which is

From the question
a = 1 , b = 5 , c = 13
So we have

<u>Separate the solutions</u>

The equation has complex roots
<u>Separate the real and imaginary parts</u>
We have the final answer as

Hope this helps you
Answer:
3 hours and 30 minutes
Step-by-step explanation:
Answer:
Infinite.
Step-by-step explanation:

Expand:

Add 6 to both sides:


Subtract 3x from both sides:


No matter what x is, it doesn't affect the answer. Thus, the equation is true for all values of x.
Answer: 
Step-by-step explanation:
Given : Sample space : n= 559
Sample proportion : 

Significance level : 
Critical value : 
Confidence level for population proportion:-

Hence, 95% confidence interval for the percentage of all auto accidents that involve teenage drivers.= 