The equation could be used to find the approximate value after x years is y = -320x + 2,800.
Linear equation of the cost model
The equation could be used to find the approximate value after x years, is calculated as follows;
y = mx + c
where;
c is the constant, equivalent to the initial cost = $2,800m is the rate of change of costinitial points (0, 2,800)
final points (8, 240)
m = (240 - 2800)/(8 - 0)
m = -320
y = -320x + 2,800
Thus, the equation could be used to find the approximate value after x years is y = -320x + 2,800.
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what type of sampling is being employed if the country is divided into economic classes and a sample is chosen from each class to be surveyed?
A type of sampling in which the country is divided into economic classes and a sample is selected from each class for survey is known as stratified sampling.
The types of sampling.In Statistics, there are different types of sampling methods used by researchers and these include the following;
Random sampling.Convenience sampling.Cluster sampling.Systematic sampling.Stratified sampling.Basically, stratified sampling is a type of sampling in which a population is divided into distinct classes and a sample is selected from each class for survey.
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Why might you focus on net price, not published price, when making decisions about which college to attend?
Answer:
Net price is the college’s annual cost of attendance minus the grants, scholarships, tuition waivers and other gift aid a student receives for one year of college. This does not factor in loans. It includes only the forms of financial aid that a student does not have to repay or earn through work.
Explanation:
An academic quiz show features local high
school students. Each correctly answered
question nets the team one point and an
incorrectly answered question results in a
two-point deduction. If a team scored 38
points on a fifty-question quiz, how many
questions did it answer incorrectly?
Answer:
4 questions
Explanation:
We can either reason this out with logic or solve it out using a system of equations. I will use a system of linear equations to make it easier to understand. We can use two variables in this case: let x equal the number of questions the team answered correctly, and let y equal the number of questions the team answered incorrectly. Since there are two unknown quantities, we will need two equations. Let's use the fact that there are 50 questions total to create our first equation. The total number of questions is just the sum of the correctly and incorrectly answered questions (assuming the team did not leave any answers blank). This means that our first equation is just the following: x + y = 50. For the purpose of the solution, I am going to isolate y and say that y = 50 - x
We can use the point values were know about to create our second equation. We know that the team got 38 points. We also know that correct answers add one point and incorrect answers subtract two points (meaning incorrect answers are worth twice as much as correct answers). Knowing this, we can set up the following equation: x - 2y = 38 (x number of 1-point questions answered correctly, minus 2 times the number of questions answered incorrectly, equals 38 total points).
The system is the following:
[tex]y=50-x\\x-2y=38[/tex]
Now, we can use substitution to solve this system of linear equations. We already know that y = 50-x, so let's substitute that into the second equation to solve for x:
[tex]x-2(50-x)=38\\x-100+2x=38\\3x=138\\x=46[/tex]
y represents the number of questions answered incorrectly, and if we solve for y we get that y = 50 - 46 = 4
Therefore, the team answered 4 questions incorrectly
The number of questions that the students answered incorrectly to get the 38 points was 6 questions.
How to find the number of questions?If we assume the team answered all questions correctly, it would have 50 points. However, the team scored 38 points, which is 12 points less than the maximum.
Because each incorrect answer results in a two-point deduction, we can find out how many questions they answered incorrectly by dividing the missing points by 2:
= 12 points / 2
= 6 incorrect answers
Therefore, the team answered 6 questions incorrectly.
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What factors, other than rate, should you consider before choosing a personal loan?
Answer:
One should remember that personal loans are collateral-free, so lending institutions thoroughly check borrowers' profiles on criteria such as income, credit score, age, and employment history
One bag of potatoes of a certain brand
weighs 40 ounces. Five pounds of these
potatoes cost $4.00. If Larry has exactly
$20.00 to spend on potatoes, what is the
maximum number of bags he can buy? (1
pound = 16 ounces)
Answer:
20bags
if 1b weighs 40ouces what aboutAnswer:
10 bags
Explanation:
We know that one bag has 40 ounces or 2.5 pounds (40/16) of potatoes. We also know that 5 pounds of potatoes cost 4 dollars. Since 5 is 2*2.5, we know that each bag of potatoes costs 4/2 or 2 dollars (just looking at the common ratios). Since each bag of potatoes costs 2 dollars, and Larry has 20 dollars, he can buy a maximum of 10 bags of potatoes (20/2=10).
There are 120 people at a polling place. The ratio of people who have voted to those who haven't voted is 1:5. How many people have not voted?
The least integer of a set of consecutive
even integers is -30. If the sum of these
integers is 66, how many integers are in the
set?
Based on the calculations, the number of integers in this set are 33.
How to determine the number of integers?Since the least integer of this set of consecutive even integer is -30. Thus, the sequence would be as follows:
-30, -28, -26, -24,....0.
Based on the given sequence, we have:
n/2[(2 × (-30)) + (n - 1) × 2] = 66
n [-30 + n - 1] = 66
n(n - 31) = 66
n² - 31n - 66 = 0
Factorizing the quadratic equation, we have:
n² - 33n + 2n - 66 = 0
n(n - 33) + 2(n - 33) = 0
(n - 33)(n + 3) = 0
Therefore, n = 33.
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23. A lawn covers 108.6 square feet. Russ
mowed all of the lawn in three evenings. He
mowed 2/9 of the lawn during the first
evening. He mowed twice that amount on
the second evening. On the third and final
evening he mowed the remaining lawn.
How many square feet were mowed the
third evening?
The number of square feet that were mowed in the third evening is 36.201 ft².
Amount of lawn moved in the first dayAmount (day 1) = ²/₉ x 108.6 ft²
Amount (day 1) = 24.133 ft²
Amount of lawn moved in the second dayAmount (day 2) = 2(24.133 ft²) = 48.266 ft²
Amount of lawn moved in the third dayAmount (day 3) = 108.6 ft² - (24.133 ft² + 48.266 ft²)
Amount (day 3) = 36.201 ft²
Thus, the number of square feet that were mowed in the third evening is 36.201 ft².
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x^3(x^2-13)=-36x
If x>0, what is one possible solution to the equation shown above?
Answer:
[tex]\{2\} \cup \{3\}[/tex]
Explanation:
[tex]x^3(x^2 - 13) = -36x; \\ x^3(x^2 - 13) + 36x = 0; \\ x(x^2(x^2 - 13) + 36)=0; \\ x(x^4 - 13x^2 + 36) = 0 \\ \left \ [ {{x = 0} \atop {x^4 - 13x^2 + 36 = 0}} \right.[/tex]
We have two equalities.
Let us analyze the latter.
Let [tex]x^2 = t[/tex] on condition that [tex]t \geq 0[/tex], then:
[tex]t^2 - 13t + 36 = 0; \\ a = 1, b = -13, c = 36; \\ D = b^2 - 4ac = (-13)^2 - 4 * 1 * 36 = 169 - 144 = 25 = 5^2, > 0; \\ t_{1, 2} = \frac{-b \pm \sqrt{D}}{2a} = \frac{-(-13) \pm \sqrt{5^2}}{2 * 1} = \frac{13 \pm 5}{2} = \ [ {{\frac{13 - 5}{2} = \frac{8}{2} = 4 } \atop {\frac{13 + 5}{2} = \frac{18}{2} = 9 }} \right.[/tex]
Substitute [tex]t[/tex] back for [tex]x^2[/tex], keep in mind that [tex]t \geq 0[/tex].
[tex]\left \ [ {{x^2 = 4} \atop {x^2 = 9}} \right. \Leftrightarrow \left \ [ {{x = \pm 2} \atop {x = \pm 3}} \right.[/tex]
Therefore, [tex]\{-3\} \cup \{-2\} \cup \{0\} \cup \{2\} \cup \{3\}[/tex] is our set of solutions. Given the condition that we need our variable to be more than zero, our answer is [tex]\{2\} \cup \{3\}[/tex].
(x^5*y^6)^1/5(x^3*y^4)^1/4=x^m/4*y^n/5
If the equation above, where m and n are constants, is true for all positive values of x and y, what is the value of m+n?
If m and n are constants and it is true for all positive values of x and y, the value of m+n is 7+11 = 18
What is the simplification of the given algebra?The simplification of the given algebra can be evaluated by using the law of indices.
Given that:
[tex]\mathbf{=(x^5y^6)^{1/5}(x^3y^4)^{1/4}}[/tex]
[tex]\mathbf{=xy^{6/5}(x^3y^4)^{1/4} }[/tex]
Simplifying using the multiplication power rule.
[tex]\mathbf{=xy^{6/5}(x^{3/4}y)}[/tex]
[tex]\mathbf{=xy^{6/5} \times (x^{3/4}y)}[/tex]
Multiplying like terms.
[tex]\mathbf{=x^{\frac{4+3}{4}} y^{\frac{6+5}{5}}}[/tex]
[tex]\mathbf{=x^{\frac{7}{4}} y^{\frac{11}{5}}}[/tex]
where;
m = 7 and n = 11The value of m+n = 7+11 = 18.
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Question 44
2 points Save Answer
Antonia and Isabel are mothers who both have three-month-old infants. Antonia tells Isabel, "My son is so fussy," to which Isabel replies. "That's funny-
my son is so easy." It appears that Antonia and Isabel are discussing their newborns.
O personalities.
moods.
reflexes
temperaments
Activate Windows
Go to Settings to activate Window
It Show that Antonia and Isabel are discussing Temperaments of their newborns.
What is a person's temperament?A person's temperament is known to be that which tells how a person behave and stands for themselves as a result of their personality traits and other experiences.
Note that in the case above, It Show that Antonia and Isabel are discussing Temperaments of their newborns.
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Amanda travels to work from home in 60
minutes. If, on her way home, she increases
her average speed by 20% and she travels
by the exact same route, how many
minutes will it take her to get home?
Answer:
50 minutes
Explanation:
We can set this up as a rate * time = distance problem. We can set the rate at which Amanda travels to work to be x, since that quantity is unknown. The time it takes is given to be 60 minutes. This means that the total distance she travels to get to work is 60x. On the other hand, the way back home has more unknown quantities. The exact rate is unknown, but we do know that it is 20% more than the rate at which Amanda travels to work. This means that the rate is x + .20x, or 1.2x. We can set the time to be y, which means the total distance she travels to get back home is 1.2xy. We are told that Amanda uses the same route to get to and from work, which means 60x = 1.2xy. All we have to do now is solve this equation:
[tex]60x=1.2xy\\60=1.2y\\y=50[/tex]
If we divide through by x and then isolate y, we get that it takes Amanda 50 minutes to get home
What are some strategies consumers can use to reduce the amount of interest they'll pay on credit card debt?
Answer:
Some strategies that consumers can use to reduce the amount of interest they'll pay on credit card debt are:
1. Pay off the debt with the highest interest rate first.
2. Make more than the minimum payment each month.
3. Try to negotiate a lower interest rate with your credit card company.
4. Use a balance transfer credit card to pay off your debt.
5. Get a personal loan to pay off your credit card debt.
Explanation:
Continue to pay your bills on time, get rid of any remaining debt, and establish a plan to give it another go in three to six months. The next time, you can make a stronger argument by repairing your credit.
What strategies consumers can use to reduce interest?Lower interest rates make borrowing less expensive, enabling people to spend and invest more freely. Interest rates have a long-term impact on the cost of borrowing money.
Interest rates are influenced by the supply and demand of money, government borrowing, inflation, and the Central Bank's monetary policy goals.
You may frequently be given a cheaper interest rate if you keep up good credit and a spotless payment history.
Therefore, On the other hand, higher rates increase the cost of borrowing and can cause consumers to spend less and save more.
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ax=5
In the equation above, a is a constant. For which of
the following values of a will the equation have no
solutions?
A) 0
B) 1
C) 5
D) 10
1, 5, and 10 would all result in a valid solution for x. Therefore options B, C, and D are correct.
To determine the values of "a" for which the equation Ax = 5 has no solutions, we can solve the equation for x. Since "a" is a constant, we can rearrange the equation to x = 5/a.
For the equation to have no solutions, the value of "a" must be such that the expression 5/a results in division by zero. Therefore, the value of "a" that would lead to no solutions is A) 0. If "a" is zero, then 5/0 is undefined, and the equation Ax = 5 would not have a valid solution for x.
The other options (B) 1, (C) 5, and (D) 10 would all result in a valid solution for x.
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3 reasons why a introductory rate or balance transfer APR of 0% might not be a good offer after all
Answer:
The APR doesn't last forever. Enjoy it while you can, because once your 0% introductory period is over, it's over. The 0% interest only lasts for the duration of the introductory period, and once it ends, the card will revert to its regular APR (the exact rate is determined based on your creditworthiness).
Answer:
Explanation:no
Karla tanner opened a web consulting business called link works and completed the following transaction in thr first month of operations
The length of a rectangle was reduced by 10%
and the width by x%. If the resulting
dimensions reduced the area by 32.5%,
what is the value of x?
Answer:
x = 25
Explanation:
We can let an arbitrary rectangle has a length and width of 10, making the total area 10*10 or 100. We know that the length of the rectangle is reduced by 10%, meaning the new length is now 10 - (0.1*10), or 9. The actual width is unknown, but we do know that it will be an x% reduction of the original width: 10 - (0.01x*10), or 10 - 0.1x. We are also given that the area is reduced by 32.5%. This means the new area is 100 - (0.325*100), or 100 - 32.5, which is 67.5. Now, we can use the area formula (length*width) to find the value of x:
[tex]length*width=area\\9*(10-0.1x)=67.5\\90-0.9x=67.5\\-0.9x=-22.5\\x=25[/tex]
This means that the value of x is 25, or the width was reduced by 25%
Write one to two paragraphs describing your plan. In your answer, include all of the following: (a) what you would do about your grades; (b) activities in which you can get involved; (c) possible part-time jobs you can do; and (d) standardized tests you can take. (10 points)
My plan in terms of school work is to do a small research on how one can have a good grade without stress.
In terms of my grades, I will study hard and improve on it that previous semester. The activities that i will be involved is the science club
What is the possible part-time jobs you can do?The possible jobs are:
To work in the state libraryTo work as a janitor.In terms of the above, a standardized tests that i can take is random sampling to know what and what not to do.
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Answer:
my plan start with school so when i start
I am grade 9 student.
I hope to score average above 90
I am a student so my work, job is learning
I take a test tomorrow and I am studying now
whats the diference between 1/2 e to the x minus 4 and e to the x minus 4
The difference between [tex]\frac{1}{2}e^{x-4}[/tex] and [tex]e^{x-4}[/tex] is that the first equation is only half of the second equation. When we multiplied [tex]e^{x-4}[/tex] by [tex]\frac{1}{2}[/tex], the remaining result became half of [tex]e^{x-4}[/tex]. Hope this helps!
A customer service call center for a credit
card company asks 1 in 8 of the callers to
take a survey at the conclusion of the call.
Approximately 20% of those solicited
consent to the survey. If 400 callers were
serviced between 2:00 and 3:00 one
afternoon and 20% of the callers consented
to the survey, how many callers did not
consent to the survey?
The number of callers that did not consent to the survey is 40 callers.
Number of callers that did not consent to the surveyUsing this formula
Number of caller=Callers×(1-Percentage of those that solicited)÷Callers at conclusion survey
Let plug in the formula
Number of caller=400 ×(1-20%)÷8
Number of caller=400 ×80%÷8
Number of caller=320÷8
Number of caller=40 callers
Therefore the The number of callers that did not consent to the survey is 40 callers.
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List two recommended strategies you can use to save money
Answer:
-save by the $100's and spend whatever you have left until you get payed again
Function f is defined by the equation
f(x)=ax² + [tex]\frac{2}{a} x[/tex]. If f(3) – f(2) = 11, what is the
smallest possible value of a?
The smallest possible value of a in the given function is 1/5.
Value of f(3)
From the given function, the value of f(3) is calculated as follows;
f(x)=ax² + [tex]\frac{2}{a} x[/tex]
f(3) = a(3)² + [tex]\frac{2}{a}(3)[/tex]
f(3) = 9a + 6/a
Value of f(2)f(x)=ax² + [tex]\frac{2}{a} x[/tex]
f(2) = a(2²) + [tex]\frac{2}{a} (2)[/tex]
f(2) = 4a + 4/a
f(3) – f(2) = 11
(9a + 6/a) - ( 4a + 4/a) = 11
9a + 6/a - 4a - 4/a = 11
5a + 2/a = 11
multiply through with "a"
5a² + 2 = 11a
5a² - 11a + 2 = 0
5a² - 10a - a + 2 = 0
5a(a - 2) - 1(a - 2) = 0
(5a - 1)(a - 2) = 0
a = 2, or
5a = 1
a = 1/5
Thus, the smallest possible value of a in the given function is 1/5.
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using the approximation 2.54 centimeters = 1 inch, how many inches is 146.3 centimeters
Answer:
57.598 inches
Explanation:
2.54 cm / 1 inch = 146.3 cm / ? inches
? inches = 57.598