Find a linear equation to solve for the following unknown quantities: One number is three more than twice another number. If the sum of the two numbers is
find the numbers.
Setting up a linear equation to solve a real-world application
There are two cell phone companies that offer different packages. Company A charges a monthly service fee of $34 plus $.05/min talk-time. Company B charges a monthly service fee of $40 plus $.04/min talk-time.
Write a linear equation that models the packages offered by both companies.
If the average number of minutes used each month is 1,160, which company offers the better plan?
If the average number of minutes used each month is 420, which company offers the better plan?
How many minutes of talk-time would yield equal monthly statements from both companies?
The model for Company
A can be written as
This includes the variable cost of
plus the monthly service charge of $34. Company
B ’s package charges a higher monthly fee of $40, but a lower variable cost of
Company
B ’s model can be written as
If the average number of minutes used each month is 1,160, we have the following:
So, Company
B offers the lower monthly cost of $86.40 as compared with the $92 monthly cost offered by Company
A when the average number of minutes used each month is 1,160.
If the average number of minutes used each month is 420, we have the following:
If the average number of minutes used each month is 420, then Company
A offers a lower monthly cost of $55 compared to Company
B ’s monthly cost of $56.80.
To answer the question of how many talk-time minutes would yield the same bill from both companies, we should think about the problem in terms of
coordinates: At what point are both the
x- value and the
y- value equal? We can find this point by setting the equations equal to each other and solving for
x.
Check the
x- value in each equation.
Therefore, a monthly average of 600 talk-time minutes renders the plans equal. See
[link]
Find a linear equation to model this real-world application: It costs ABC electronics company $2.50 per unit to produce a part used in a popular brand of desktop computers. The company has monthly operating expenses of $350 for utilities and $3,300 for salaries. What are the company’s monthly expenses?
Many applications are solved using known formulas. The problem is stated, a formula is identified, the known quantities are substituted into the formula, the equation is solved for the unknown, and the problem’s question is answered. Typically, these problems involve two equations representing two trips, two investments, two areas, and so on. Examples of formulas include the
area of a rectangular region,
the
perimeter of a rectangle,
and the
volume of a rectangular solid,
When there are two unknowns, we find a way to write one in terms of the other because we can solve for only one variable at a time.
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
