Answer:
2
Step-by-step explanation:
d.
16x-3= -48
5x-3= -15
-7x-3= 21
=-42
c.
20x4= 80
-8x4= -32
= 48
-7+3= -4
La nota de Karina en su curso de nivelación matemática es 7 veces la cantidad de factores primos que tiene el siguiente polinomio:
P (a; b; c) =a(a +b-c) +b(a+ b-c) +c(a +b- c)
Hallar la nota que obtuvo.
Karina obtuvo una nota final de 84 de 100 puntos en su curso de nivelación matemática.
¿Qué nota obtuvo Karina obtuvo en su curso de nivelación matemática?
Antes de comenzar la resolución de este problema, asumimos que la base de calificación del curso de nivelación matemática es 100 y que la nota mínima para pasar es 70. Por otra parte, sabemos que la nota obtenida por Karina es divisible por 7 y que es el producto de aquel número primo y un polinomio formado por una relación de tres números primos, la cual es simplificada a continuación:
p (a, b, c) = a · (a + b - c) + b· (a + b - c) + c · (a + b - c)
p (a, b, c) = a² + a · b - a · c + a · b + b² - b · c + a · c - b · c - c²
p (a, b, c) = a² + 2 · a · b + b² - c²
p (a, b, c) = (a + b)² - c²
p (a, b, c) = (a + b + c) · (a + b - c)
Si asumimos que Karina obtuvo 84, entonces se tiene que 84 = 7 × 12 y 12 = 2 × 6. Tanto el dos como el seis son múltiplos de dos, entonces asumimos a = b = c y encontramos que:
n (2, 2, 2) = 7 · (2 + 2 + 2) · (2 + 2 - 2)
n (2, 2, 2) = 7 · 6 · 2
n (2, 2, 2) = 84
En síntesis, Karina obtuvo una nota final de 84 de 100 puntos en su curso de nivelación matemática.
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A shopkeeper sold 20 mobile sets of same brand for Rs 3,00.0000 at the same rate in a week What is the selling price of each mobile set
Answer:
15
Step-by-step explanation:
cost of 20 mobile set=300
cost of 1 mobile set
=cost of mobile set/number of mobile set
=300/20
=15
The cost of each mobile set is ₹1,50,000.
What is the unit rate?Unit rate can be defined as the ratio between two measurements with the second term as 1. It is considered to be different from a rate, in which a certain number of units of the first quantity is compared to one unit of the second quantity.
Given that, a shopkeeper sold 20 mobile sets of same brand for ₹3,000,000.
The selling price of each mobile set = Total cost of mobile sets/Number of mobile sets
= 3,000,000/20
= ₹1,50,000
Therefore, the cost of each mobile set is ₹1,50,000.
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The median household in the United States increased by a rate of 0.25% each year between 1980 and 1985. If the median household income was $42,050 in 1980, what was the median household income after 5 years? Round answer to the nearest whole dollar.
Using an exponential function, the median household income after 5 years was of $42,578.
What is an exponential function?An increasing exponential function is modeled by:
[tex]A(t) = A(0)(1 + r)^t[/tex]
In which:
A(0) is the initial value.r is the growth rate, as a decimal.For this problem, the parameters are:
A(0) = 42050, t = 5, r = 0.0025[/tex]
Hence:
[tex]A(t) = A(0)(1 + r)^t[/tex]
[tex]A(t) = 42050(1.0025)^t[/tex]
[tex]A(5) = 42050(1.0025)^5 = 42578[/tex]
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32. What is the perimeter of a regular octagon with a side length of 7 units?
11 units
35 units
49 units
56 units
Answer:
56
Step-by-step explanation:
solution
Here
P=8a=8·7=56
Answer:
56 units
Step-by-step explanation:
the perimeter of a rectangular octagon with sides of length a
is equal to: 8 × a
Then
the perimeter of a regular octagon with a side length of 7 units
is equal to: 8 × 7 = 56 units
32) Find the cost of linoleum flooring for a floor that is 15 feet by 10 feet if it costs $9.00 to cover 12 square feet.
O a.) $110.50
Ob.) $132.50
Oc.) $122.50
Od.) $112.50
Answer:
d.) $112.50
Step-by-step explanation:
Area of floor:
15 ft × 10 ft = 150 ft²
150 ft² is how many times 12 ft²?
It is 150 ft² / 12 ft² = 12.5.
150 ft² is 12.5 times 12 ft².
12 ft² cost $9.00, so 12.5 times 12 ft² costs 12.5 times $9.00.
12.5 × $9.00 = $112.5
Answer: d.) $112.50
Heights (cm) and weights (kg) are measured for 100 randomly selected adult males, and range from heights of 130 to 190 cm and weights of 40 to 150 kg. Let the predictor variable x be the first variable given. The 100 paired measurements yield x= 167.65 cm, y= 81.36 kg, r= 0.309, P-value= 0,002, and y= 106+1.15x. Find the best predicted value of y (weight) given an adult male who is 156 cm tall. Use a 0.10 significance level.
The best predicted weight of a person that is 156 cm is 285.4kg
We have the regression equation asy= 106+1.15
When the adult male is 156 cm tall the weight of this person would be calculated as:
y= 106+1.15*156
y = 106 + 179.4
y = 285.4
Hence we can arrive at the conclusion that the best predicted weight of a person that is 156 cm is 285.4kg
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a) A furniture store can sell 40 chairs per week at a price of sh. 80 each. The manager estimates that for each and sh. 5 price reduction, she can sell five more chairs per week. The chairs cost the store sh. 30 each. If x stands for the number of sh. 5 per price reduction, find price of the chairs and the quantity that maximize profit.
The price of the chairs and the quantity that maximizes profit is to sell 45 chairs at $75 each.
ProfitGiven that a furniture store can sell 40 chairs per week at a price of $80 each, and the manager estimates that for each and $5 price reduction, she can sell five more chairs per week, and the chairs cost the store $30 each, to determine the price of the chairs and the quantity that maximize profit, the following calculation must be made:
40 x (80-30) = 200045 x (75-30) = 202550 x (70-30) = 200055 x (65-30) = 1925Therefore, the price of the chairs and the quantity that maximizes profit is to sell 45 chairs at $75 each.
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A national chain of department stores ranks its 1,000,000 salespeople by the monetary value of their sales. Karen's sales are at the 26th percentile. Brian's sales
are at the 33rd percentile.
(If necessary, consult a list of formulas.)
(a) Which of the following must be true about Karen's sales?
The value of Karen's sales were about 26% of the chain's total.
O The value of Karen's sales was in the top half of all of the salespeople.
O Karen sold $2600 in merchandise.
O Karen had sales lower in value than about 74% of the salespeople.
(b) Which of the following must be
true about Karen's and Brian's sales?
The value of Brian's sales were $700 more than Karen's.
O The value of Karen's sales were $700 more than Brian's.
O Both Karen and Brian had sales higher in value than the median.
O Both Karen and Brian had sales lower in value than the median.
(a) The truth about Karen's sales is that Karen had sales lower in value than about 74% of the salespeople. So, the correct option is D.
(b) The truth about Karen's and Brian's sales is that both Karen and Brian had lower sales in value than the median. So, the correct option is D.
Given that department stores rank their 1,000,000 salespeople by the monetary value of their sales. Karen's sales are at the 26th percentile and brian's sales are at the 33rd percentile.
A percentile is a measure used in statistics that indicates the value below which a certain percentage of observations in a group of observations falls.
(a) Karen had sales lower in value than about 74% of the salespeople because the 26% percentile represents his relative position among all the employees in terms of sales.
(b) Both Karen and Brian had sales lower in value than the median because the Median represents the 50th percentile. Since Karen's sales are at the 26th percentile and Brian's sales are at the 33rd percentile it implies their sales are less than the median value.
Hence, the truth about Karen's sales is Karen had sales lower in value than about 74% of the salespeople, and true about Karen's and Brian's sales is both Karen and Brian had lower sales in value than the median.
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How do the y-values in the table grow? The y-values increase by a factor of 49 for each x increase of 1. The y-values increase by 49 for each x increase of 1. The y-values increase by a factor of 7 for each x increase of 1. The y-values increase by 7 for each x increase of 1.
From the table, we can deduce that The y-values increase by a factor of 7 for each x increase of 1 and is denoted as option C.
What is a Factor?
This is defined as a number which divides another without leaving a remainder afterwards.
From the table, we can deduce that the y-values are divisible by 7 thereby making it a factor of it and confirming that it increase by a factor of 7 for each x increase of 1.
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Write the following in simplified radical form.
3/40
Answer:
3.42
Step-by-step explanation:
Find the sum of the first 20 arithmetic progression 2, 7, 12, 17, 22
Answer: 5
Step-by-step explanation: 2 + 5 = 7, 7 + 5 = 12, 12 + 5 = 17, 17 + 5 = 22
Gcf of 12h3,36h3,12h6
The greatest common factor from the given information is 12h³.
What is the greatest common factor?The greatest common factor (GCF) of a given set of whole numbers is the largest value that can be divided by the set of numbers.
From the information given, we are to find the GCF of:
12h³ = (1 , 2, 3, 4, 6 , 12 )h³
36h³ = (1, 2, 3, 4, 6, 9, 12, 18, 36)h³
12h⁶ = (1, 2, 3, 4, 6, 12)h³ * h³
Therefore, we can conclude that the greatest common factor is 12h³.
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You get a raise of 3.5% each year.
a. What is the approximate doubling time of your salary?
b. If you are currently 25 years old and are making $40,000 per year, use the approximate doubling time to find your annual salary when you retire at the age of 65.
Using an exponential function, it is found that:
a) The doubling time of the salary is of approximately 20 years.
b) The salary will be of $160,000.
What is an exponential function?An increasing exponential function is modeled by:
[tex]A(t) = A(0)(1 + r)^t[/tex]
In which:
A(0) is the initial value.r is the growth rate, as a decimal.The growth rate for this problem is:
r = 0.035.
The doubling time is t for which A(t) = 2A(0), hence:
[tex]A(t) = A(0)(1 + r)^t[/tex]
[tex]2A(0) = A(0)(1.035)^t[/tex]
[tex](1.035)^t = 2[/tex]
[tex]\log{(1.035)^t} = \log{2}[/tex]
[tex]t\log{1.035} = \log{2}[/tex]
[tex]t = \frac{\log{2}}{\log{1.035}}[/tex]
t = 20 years.
You retire in 40 years, which is 2 doubling periods, hence the salary will be of:
40000 x 2 x 2 = $160,000.
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Please help I’m unsure
Step-by-step explanation:
3 answer.....
......dkdkdk
16
A Ferris wheel with a radius of 25 m makes 2 rotations every minute.
a. State the period of the Ferris wheel.
b. Complete a tables of values showing the height above the ground for 2 rotations of
Ferris wheel by assigning the correct variables
c. Graph 2 rotations of the Ferris wheel. (Hint: Time Vs Height above the platform)
d. State the amplitude of the Ferris wheel.
The period of this Ferris wheel can be calculated as 30 seconds. The amplitude is 25
How to solve for the period.a. We have 60 seconds in a minute
In a minute it makes 2 rotations. The period = 60 secs / 2 rotations
= 30 seconds
b. We have h = 25 - 25cos [tex]\frac{25}{30} t[/tex]
25 - 25cos[tex]\frac{25}{15} t[/tex]
We would have the table in the attachment
d. Amplitude
= max - min / 2
= 50 - 0 / 2
= 25
question 3 of 8. Step 1 of 1
1/8
Correct
-
1
Incorrect
Adairy needs 385 gallons of milk containing 6 % butterfat. How many gallons each of milk containing 7 % butterfat and milk containing 2 % butterfat must be used to
obtain the desired 385 gallons?
308 gallons of 7% and 77 gallons of 2% are needed to obtain the desired 385 gallons.
CombinationSince a dairy needs 385 gallons of milk containing 6% butterfat, to determine how many gallons each of milk containing 7% butterfat and milk containing 2% butterfat must be used to obtain the desired 385 gallons, the following calculation must be performed:
385 x 0.06 = 23.1300 x 0.07 + 85 x 0.02 = 22.7310 x 0.07 + 75 x 0.02 = 23.2308 x 0.07 + 77 x 0.02 = 23.1Therefore, 308 gallons of 7% and 77 gallons of 2% are needed to obtain the desired 385 gallons.
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5·(3+6)x^{2} -6x^{2}
[tex]5·(3+6)x^{2} -6x^{2}[/tex]
[tex]\large\displaystyle\text{$\begin{gathered}\sf 5(3+6)x^{2} -6x^{2} \end{gathered}$}[/tex]
Add 3 and 6 to get 9.
[tex]\large\displaystyle\text{$\begin{gathered}\sf 5\times9x^{2} -6x^{2} \end{gathered}$}[/tex]Multiply 5 and 9 to get 45.
[tex]\large\displaystyle\text{$\begin{gathered}\sf 45x^{2} -6x^{2} \end{gathered}$}[/tex]Combine 45x² and −6x² to get 39x².
[tex]\boxed{\large\displaystyle\text{$\begin{gathered}\sf \red{39x^{2} } \end{gathered}$} }[/tex]A company's cost formula for its salaries and wages cost is $2,850 per month plus $317 per job. For the
month of February, the company planned for activity of 16 jobs, but the actual level of activity was 14
jobs. The actual salaries and wages cost for the month was $7,640. The spending variance for salaries
and wages cost in February would be closest to:
$352 F
$352 U
O $282 F
$282 U
The spending variance for salaries and wages cost in February would be closest to; $282 F.
What is the spending variance in February?The spending variance as the name implies is the difference between the budgeted cost and actual cost paid for an item. It therefore follows from the definition above that for the month of February;
Spending variance = $7,640 - (2850 + (16×317))
Spending variance = $7,640 - (7922)
Spending variance is therefore; $282 F.
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HELP PLEASE
2. You are making necklaces for your friends. You have 72 blue beads and 42 red beads. Each friend will receive an identical necklace, and all beads must be used.
(A) What is the greatest number of friends who can receive a necklace? Explain your reasoning.
(B) How many of each color bead will each friend receive on the necklace? Explain your reasoning.
A. The greatest number of friends who can receive a necklace made from a combination of 72 blue and 42 red beads is 6.
B. Each friend will receive a necklace with 12 blue beads and 7 red beads.
How is this determined?The solution to this problem can be determined by considering the highest common factors of 72 and 42.
The common factors of 72 and 42 are 2 and 3.
The factors of 72 are 2, 3, and 12.
The factors of 42 are 2, 3, and 7.
2 x 3 = 6
When 6 divides 72 = 12
When 6 divides 42 = 7
Data and Calculations:Number of blue beads = 72
Number of red beads = 42
The highest number that can divide 72 and 42 without a remainder is 6.
Thus, each friend's necklace will contain 19 beads (12 blue beads and 7 red beads).
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If John has pairs of red, orange, yellow, blue, green, white and black socks, how many orders can he wear them in over 7 days? Repetition is allowed because John is alright with wearing dirty socks.
The order in which he can wear the socks with repetition in 7 days is 823, 543 orders
How to determine the order
The formula for calculating permutation with repetition is given as;
Permutation = [tex]n^r[/tex]
Where n = 7
r = 7
Substitute into the formula
Permutation = [tex]7^7[/tex]
Permutation = [tex]823, 543[/tex] ways
Thus, the order in which he can wear the socks with repetition in 7 days is 823, 543 orders
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how can i got 24.8 show your work
Need help with that I don’t understand it
The answer is no. b.
Step-by-step explanation:
The answer is no b. u just take common
Find the missing length indicated. i need help with steps
The measure of the missing length from the given diagram is 25
Triangular altitude theoremAccording to the theorem, the altitude on the hypotenuse is equal to the geometric mean of line segments formed by altitude on the hypotenuse.
According to the given diagram, the expression below will be used to determine the value of x
x/60 = 60/144
Cross multiply yo have:
144x = 60 * 60
Simplify the result to have
144x = 3600
Divide both sides by 144
144x/144 = 3600/144
x = 3600/144
x = 25
Hence the measure of the missing length from the given diagram is 25
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What is an equation of the line that passes through the points (6, 4) and(6,−6)?
Answer:
Step-by-step explanation:
Students at a high school were polled to determine the type of music they preferred. There were students who completed the poll. Their responses are represented in the circle graph.
What percent of students preferred music?
A circle graph titled Music Preferences consists of a circle divided into 6 regions with labels and sizes as follows: rap, 945; alternative, 462; rock and roll, 275; country, 168; jazz, 15; other, 85.
Music Preferences
Rap 945
Alternative 462
Rock and Roll 275
Country 168
Jazz 15
Other 85
The percent of students that preferred alternative music is 23.7%
How to determine the percentage?The music type and the preference are given as:
Music Preferences
Rap 945
Alternative 462
Rock and Roll 275
Country 168
Jazz 15
Other 85
From the above table, we have:
Alternative = 462
Total = 945 + 462 + 275 + 168 + 15 + 85
Total = 1950
The percentage is then calculated as:
Percentage = Alternative/Total * 100%
This gives
Percentage = 462/1950 * 100%
Evaluate
Percentage = 23.7%
Hence, the percent of students that preferred alternative music is 23.7%
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If n = 140 and X = 112, construct a 95% confidence interval for the population proportion, p.
Give your answers to three decimals
The confidence interval for the population proportion, p is (0.766, 0.833)
Confidence intervalThe formula for calculating the confidence interval for proportion is expressed as:
CI = p±√pq/n
Given the following
p = 112/140 = 0.8
q = 1-p = 0.2
Substitute
CI = 0.8±√(0.8)(0.2)/140
CI = 0.8±0.0338
CI = (0.766, 0.833)
Hence the confidence interval for the population proportion, p is (0.766, 0.833)
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the set of all months that contain less than 31 years
The set of all months that contains less than 31 days is; {February, April, June, September, November}.
What is the set of all months that contain less than 31 days?It follows from the task content that the set whose elements are to be determined is characterized by containing less than 31 days.
On this note, it follows that the elements of the set are; February (28/29 days), April (30 days), September (30 days), June (30 days) and November (30 days).
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What is the equation of the line in slope-intercept form?
[tex]y=\frac{3}{5}x+3[/tex]
Step-by-step explanation:Slope-intercept form is the most common form of a linear function.
Formula
The formula for slope-intercept form is y=mx+b, where m is the slope and b is the y-intercept. In this question, we must find both m and b by looking at a graph.
Slope
The slope is the change in y over the change in x. So, one way to find the slope is to identify 2 points on the graph and count the difference between them.
For example, the points (-5,0) and (0,3). First, the y-value increases by 3. Then, the x-value increases by 5. This gives us the final slope, [tex]\displaystyle\frac{3}{5}[/tex].Another way to find the slope is to use the formula [tex]\displaystyle\frac{y_{2}- y_{1} }{x_{2}- x_{1} }[/tex]. You can plug in the values from both points and solve to get the same answer.
Y-Intercept
The y-intercept is easy to find from a graph. The y-intercept is wherever the line intersects with the y-axis (the vertical axis). In this case, the line intersects at y-value 3. So, 3 is the b-value in the equation.
Final Equation
Using the information above, we can say that the equation of the line in slop-intercept form is [tex]y=\frac{3}{5}x+3[/tex].
BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
B.) (1, -5)
Given, equation:
[tex]\sf \dfrac{(x-1)^2}{25} -\dfrac{(y+5)^2}{49} =1[/tex]
Comparing it with standard formula of hyperbola:
[tex]\sf \dfrac{(x-h)^2}{a^2} -\dfrac{(y-k)^2}{b^2} =1[/tex]
where (h, k) is center
The given equation in standard form:
[tex]\sf \dfrac{(x-1)^2}{5^2} -\dfrac{(y-(-5))^2}{7^2} =1[/tex]
Determined:
(h, k) = (1, -5)
a = 5, b = 7
So, here (1, -5) is the center of the given hyperbola.
Find the median for the scores 91, 69, 71, 82, 71, 95, 87, 74, 71, 89, 89, 95, 72, 75
[tex]\huge\text{Hey there!}[/tex]
[tex]\huge\textbf{What does \boxed{median} mean in math?}}[/tex]
[tex]\boxed{\text{Median}}\rightarrow\textsf{ is the number in the middle.}[/tex]
[tex]\huge\textbf{How do you find the \boxed{median}?}[/tex]
[tex]\text{You can found it by putting the numbers from \bf least to greatest.}[/tex]
[tex]\huge\textbf{Question reads....}[/tex]
[tex]\text{Find the median for the scores 91, 69, 71, 82, 71, 95, 87, 74, 71, 89, 89, 95,}\\\text{72, 75}[/tex]
[tex]\huge\textbf{Equation:}[/tex]
[tex]\text{91, 69, 71, 82, 71, 95, 87, 74, 71, 89, 89, 95, 72, 75}[/tex]
[tex]\huge\textbf{Rearrange the problems to:}[/tex]
[tex]\text{69,71,71,71,72,74,75,82,87, 89,89,91,95,95}[/tex]
[tex]\huge\textbf{The expression:}[/tex]
[tex]\mathsf{\dfrac{75 + 82}{2} = median}[/tex]
[tex]\huge\textbf{Simplify it:}[/tex]
[tex]\mathsf{\dfrac{75 + 82}{2} = median}[/tex]
[tex]\mathsf{\dfrac{157}{2} = median}[/tex]
[tex]\mathsf{257\div2 = median}[/tex]
[tex]\mathsf{78.5 = median}[/tex]
[tex]\huge\textbf{Therefore, your answer should be:}[/tex]
[tex]\huge\boxed{\mathsf{78.5}}\huge\checkmark[/tex]
[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]