Answer:
This question makes no sense at all what are you trying to find, what do you need help with
Step-by-step explanation:
Answer:
(2x−1)(2x−3)
Step-by-step explanation:
4x² - 6x - 2x + 3
= 4x² - 8x + 3 (by factorization method, or choose any of your favorite methods)
= (2x−1)(2x−3)
Answer:
a) The average salary of firefighters in Portugal is $583.
b) The standard deviation of the salary of firefighters in Portugal is $319.8
Step-by-step explanation:
We are given the following in the question:
a) Standard Deviation, σ = $145.80
We are given that the distribution of salary of professor is a bell shaped distribution that is a normal distribution.
Formula:

A salary of $510.10 has a z-score of -0.50.
Putting values, we get,

Thus, the average salary of firefighters in Portugal is $583.
b) Mean, μ = $2,132
We are given that the distribution of salary of computer programmers is a bell shaped distribution that is a normal distribution.
Formula:

The salary of $2,291.90 has a z-score of +0.50
Putting values, we get,

Thus, the standard deviation of the salary of firefighters in Portugal is $319.8