Answer and explanation
We solve the inequality in terms of the variable x, which means we want to isolate the x by moving all the terms to the left-hand side.
Step 1: We first start with addition/subtraction and add 4 4/5 (positive) to both sides to cancel out the -4 4/5 on the right-hand side.
Because the two mixed numbers have the same denominator, we're able to add the two whole numbers and the two fractions:
\(14\frac{1}{5}(+4\frac{4}{5}) \geq -4\frac{4}{5}+9x(+4\frac{4}{5})\\ (14+4)+(\frac{1}{5}+\frac{4}{5})\geq 9x \\19\geq 9x\)
We get 19 because 1/5 + 4/5 = 5/5 which simplifies to 1 and 18 (14 + 4) + 1 = 19Step 2: Now, we must divide both sides by 9 to isolate the x and get the solution to the inequality:
\((19)/9\geq (9x)/9\\19/9\geq x\\2\frac{1}{9}\geq x\)
You can either use keep the improper fraction (19/9) or further convert it to a mixed number.
Which table represents a function?
Answer:
Table 4 represents a function.
Step-by-step explanation:
Functions require that each x-value has a unique y-value. In the other tables you see a value repeated in the x column, with a different value in the y column.
Subtract ab-2a+3b from 5a-3ab+6b
Answer:
7a - 4ab + 3b
Step-by-step explanation:
5a - 3ab + 6b - (ab - 2a + 3b)
=5a - 3ab + 6b - ab + 2a - 3b
=7a - 4ab + 3b
A line passes through the origin, and is perpendicular to the line y = –2x + 6. Find the equation of the line.
Step-by-step explanation:
compare the equation with : Y=mX+C
then, for slope of perpendicular equation
m1×m2= -1
As the coordinates lies in origin it is (0,0)
then use the formula of equation of line
Help me pleaseeeeee I need help
can you plz find this witj equation
A major automobile company claims that its new electric powered car has an average range of more that 300 miles. A random sample of 40 new electric cars was selected to test the claim. Assume that the population standard deviation is 12 miles. A 5% level of significance will be used for the test. A) what would be the consequences of making a type ii error in this problem? b) compute the probability of making a type ii error if the true population mean is 305 miles. C) what is the maximum probability of making a type i error in this problem?
Answer:
Step-by-step explanation:
urmom
24 divided my 6 + 4 to the power of 2
Answer:
.24
Step-by-step explanation:
Find the absolute maximum and absolute minimum values of the function f(x)=x^3−12x^2−27x+8 over each of the indicated intervals.
(a) Interval = [−2,0]. (b) Interval = [1,10]. (c) Interval = [−2,10].
The value of Absolute maximum are (a) 8, (b) -30.36, (c) -10 and the Absolute minimum are (a) -10, (b) -362.39, (c) -362.39.
We are given a function:f(x) = x³ - 12x² - 27x + 8We need to find the absolute maximum and absolute minimum values of the function f(x) over each of the indicated intervals. The intervals are:
a) Interval = [-2, 0]
b) Interval = [1, 10]
c) Interval = [-2, 10]
Let's begin:
(a) Interval = [-2, 0]
To find the absolute max/min, we need to find the critical points in the interval and then plug them in the function to see which one produces the highest or lowest value.
To find the critical points, we need to differentiate the function:f'(x) = 3x² - 24x - 27
Now, we need to solve the equation:f'(x) = 0Using the quadratic formula, we get: x = (-b ± √(b² - 4ac)) / 2a
Substituting the values of a, b, and c, we get:
x = (-(-24) ± √((-24)² - 4(3)(-27))) / 2(3)x = (24 ± √(888)) / 6x = (24 ± 6√37) / 6x = 4 ± √37
We need to check which critical point lies in the interval [-2, 0].
Checking for x = 4 + √37:f(-2) = -10f(0) = 8
Checking for x = 4 - √37:f(-2) = -10f(0) = 8
Therefore, the absolute max is 8 and the absolute min is -10.(b) Interval = [1, 10]
We will follow the same method as above to find the absolute max/min.
We differentiate the function:f'(x) = 3x² - 24x - 27
Now, we need to solve the equation:f'(x) = 0Using the quadratic formula, we get: x = (-b ± √(b² - 4ac)) / 2a
Substituting the values of a, b, and c, we get:
x = (-(-24) ± √((-24)² - 4(3)(-27))) / 2(3)
x = (24 ± √(888)) / 6
x = (24 ± 6√37) / 6
x = 4 ± √37
We need to check which critical point lies in the interval [1, 10].
Checking for x = 4 + √37:f(1) = -30.36f(10) = -362.39
Checking for x = 4 - √37:f(1) = -30.36f(10) = -362.39
Therefore, the absolute max is -30.36 and the absolute min is -362.39.
(c) Interval = [-2, 10]
We will follow the same method as above to find the absolute max/min. We differentiate the function:
f'(x) = 3x² - 24x - 27
Now, we need to solve the equation:
f'(x) = 0
Using the quadratic formula, we get: x = (-b ± √(b² - 4ac)) / 2a
Substituting the values of a, b, and c, we get:
x = (-(-24) ± √((-24)² - 4(3)(-27))) / 2(3)x = (24 ± √(888)) / 6x = (24 ± 6√37) / 6x = 4 ± √37
We need to check which critical point lies in the interval [-2, 10].
Checking for x = 4 + √37:f(-2) = -10f(10) = -362.39
Checking for x = 4 - √37:f(-2) = -10f(10) = -362.39
Therefore, the absolute max is -10 and the absolute min is -362.39.
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d) half the number reduced by 4
Answer:0
Step-by-step explanation: You decreased by 4 means subtracting 4 from it.
Hope this helps!
notre prof de math vient de nous envoyer se travaille pour lundi je ne comprends rien sil vous plait aider moiii
Answer: f(2)=-10 f(-3)=15
Step-by-step explanation:
Let the number conceived be x.
Hence,
f(x)=(x+5)(-3)-2x+15
f(x)=-3x-15-2x+15
f(x)=-5x
Thus,
f(2)=(-5)(2)
f(2)=-10
f(-3)=(-5)*(-3)
f(-3)=15
a small bottle of Dr Pepper holds 3.2cm3 of the delicious drink. for a New Year's Eve party, you need enough Dr pepper to fill 6 cone-shaped glasses that have 4cm diameter and a 3 cm height, how many full bottles of Dr pepper would you need to buy to completely fill the 6 glasses you need?
Answer: Therefore, you would need to buy 24 bottles of Dr Pepper to completely fill the 6 glasses for your New Year's Eve party.
Step-by-step explanation:
Step 1: Calculate the volume of one glass.
We can use the formula for the volume of a cone, V = (1/3)πr^2h, where r is the radius of the cone and h is the height of the cone. The radius of the cone is half of its diameter, or 2cm. Thus, the volume of one glass is V = (1/3)π(2cm)^2(3cm) = 12.56cm^3.
Step 2: Calculate the number of bottles needed.
Now we can calculate the number of bottles needed to fill 6 glasses. We need 6 glasses, each with a volume of 12.56cm^3. Therefore, we need 6 × 12.56cm^3 = 75.36cm^3 of Dr Pepper in total. Since each bottle contains 3.2cm^3 of Dr Pepper, we need to divide 75.36cm^3 by 3.2cm^3 to calculate the number of bottles required. This gives us (75.36cm^3)/(3.2cm^3) = 23.6 bottles of Dr Pepper.
Therefore, you would need to buy 24 bottles of Dr Pepper to completely fill the 6 glasses for your New Year's Eve party.
The are a kite is 350 square feet. On diagonal is seven times as long as the other. Find the length of the shorter diagonal.
The length of the shorter diagonal of the kite is 10 feet.
Let's assume the length of the shorter diagonal of the kite is x.
According to the given information, the area of the kite is 350 square feet, and one diagonal is seven times as long as the other.
The formula to calculate the area of a kite is: Area = (1/2) * d1 * d2, where d1 and d2 are the lengths of the diagonals.
In this case, we can set up the following equation:
350 = (1/2) * x * (7x)
Simplifying the equation:
350 = (1/2) * 7x^2
700 = 7x^2
100 = x^2
x = √100
x = 10
The kite's shorter diagonal is 10 feet long as a result.
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QUICK! Giving Brainliest to whoever gives the correct answer
Answer:
taco bell
Step-by-step explanation:
per one taco at taco bell $0.53
per one taco at los comales $0.62
in a manufacturing process, a random sample of 36 manufactured bolts has a mean length of 3 inches with a standard deviation of .3 inches. what is the 99 percent confidence interval for the true mean length of the manufactured bolt?
The 99% confidence interval for the true mean length of the manufactured bolt is (2.9177, 3.0823)
Here, we need to construct a 99% confidence interval for population mean (μ) is given by
μ = x + Zα/2 * σ/√n or μ = x - Zα/2 * σ/√n
where, μ = population mean
x = sample mean
= 3 inches
σ = population standard deviation
= 0.3 inches
Zα/2= z score for a two tailed test at level of significance α = 2.576( for a 99% confidence level)
So, the upper limit would be,
μ = 3 + 1.645 * (0.3/√36)
μ = 3 + 1.646 * (0.3/6)
μ = 3.0823
And the lower limit would be,
μ = 3 - 1.645 * (0.3/√36)
μ = 3 - 1.646 * (0.3/6)
μ = 2.9177
Hence, the 99% confidence interval is (2.9177, 3.0823)
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La matemática financiera experimentó grandes avances con la creación de la banca y los negocios creados por los emprendedores. Este tipo de matemática se puede encontrar en las transacciones que realizan los concesionarios de carros, como en el siguiente caso: el costo anual (C de operación) de un automóvil nuevo es C= f + cm; f es el costo fijo (depreciación, seguros, impuestos), c es el costo de operación por kilómetro y m es el número de kilómetros recorridos. El costo total por 15000 Km es de 3000 USD, y el costo por 20000 Km es 3500 USD. Encuentra el costo fijo y el costo por kilómetro.
2. Resuelve aplicando sistemas de ecuaciones 2x2.
Answer:
c = \(\frac{1}{10}\)
f= 1500
Step-by-step explanation:
Tenemos la siguiente ecuación
\( C = f+cm\)
Tenemos los siguientes valores para m=15000, c = 3000 y para m = 20000, c=3500. Es decir, tenemos las siguientes ecuaciones
\( 3000=f+c15000, 3500=f+c20000\)
Si restamos la segunda ecuación de la primera, tenemos que
\( 3500-3000 = f-f+(20000c-15000c)\)
Luego
\( 500 = 5000c\)
Entonces \( c = \frac{500}{5000} = \frac{1}{10}\)
Si tomamos la primera ecuación, tenemos que \(3000-\frac{15000}{10} = f\). Es decir,
\( 3000-1500 = f = 1500\)
Esta solución, al plantear 2 ecuaciones y dos incógnitas, plantea un sistema dos por dos.
Can someone pls help me with this?
Answer: Graph B.
Step-by-step explanation: If he is traveling on the highway we know he starts out fast. This means it can't be graph c. After he pulls over and stops which would mean he has no speed at all he accelerates or speeds up quickly. The only graph that represents this is Graph B.
Starts fast
Slows Down and stops
Speeds Up Only represented by graph B
8 cm
4 cm
18 cm
16 cm
please hurry
Answer:
288
Step-by-step explanation:
What sum of money will earn an interest of $ 162 in 3 years at the rate of 12% per annum
Answer:
Let the sum of money be Rs p
So Amount = p +[( p x 12 x 3)/100]
{from the relation,a=p+[(pxRxt)]
But Amount is given as $162 in the question
= 162 = y +(36y)/100
162 = 34y/25
y=$119.117
So, the answer is $119.117
what is the area of the shaded sector of the circle?9pi units squared27pi units squared81pi units squared162pi units squared
The area of the shaded sector is 27 π units squared.
In geometry, a sector in a circle is a region bounded by two radii and an arc of the circle. The two radii define the boundaries of the sector, and the arc connects these two radii, forming a portion of the circle's circumference. The center of the circle is located at the intersection of the two radii that bound the sector.
The formula for the area of a sector in a circle is given by:
Area of a sector = (central angle/360⁰) x area of the circle
The area of a circle is given by:
Area = πr²
Where r = radius.
Hence,
Area of a sector = (central angle/360⁰) x πr²
Information available from the pciture:
central angle = 120⁰
r = 9 units
Hence,
Area of the sector = ( 120⁰/360⁰) x π x 9²
= ( 1/3) x π x 81 = 27 π units squared
The picture in your question is missing, most likely it was like on the attached picture.
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Answer: the answer is B 27π units²
Step-by-step explanation: it is show below.
What is the slope of a line that is parallel to the line y = x 2?
Evaluate the following expression 1/5^-2
a) 25
b) 1/25
c) -25
d) -1/25
Answer:
i think its 25!!! not completely sure tho
researchers studied the behavior of birds that were searching for seeds and insects in an oregon forest. in this forest, 54% of the trees were douglas firs, 40% were ponderosa pines, and 6% were other types of trees. at a randomly selected time during the day, the researchers observed 156 red-breasted nuthatches: 70 were seen in douglas firs, 79 in ponderosa pines, and 7 in other types of trees. Do these data provide convincing evidence that nuthatches prefer particular types of trees when they're searching for seeds and insects?
Yes, the given data provide convincing evidence that the Nuthatches prefer particular types of trees while searching for seeds and insects.
A statistical hypothesis test used to examine if a variable is likely to come from a given distribution is the Chi-square goodness of fit test. It is frequently used to assess how well sampling data represents the entire population.
Given that the number of red-breasted nuthatches (n) is 156. By convention, the significance level is α=0.05.
First, let's state the null hypothesis and alternate hypothesis.
Null hypothesis H₀: Nuthatches don't prefer particular types of trees while searching for seeds and insects.
Alternate hypothesis H₁: Nuthatches prefer particular types of trees while searching for seeds and insects.
Given: p₁=54%=0.54, p₂=40%=0.40, p₃=6%=0.06
The expected frequency (E) for each probability is:
\(\begin{aligned}E_1&=np_{1}\\&=156\times0.54\\&=84.24\\E_2&=np_{2}\\&=156\times0.40\\&=62.4\\E_3&=np_{3}\\&=156\times0.06\\&=9.36\end{aligned}\)
The observed values (O) are given as 70, 79, and 7. Calculating chi-square, we get,
\(\begin{aligned}\chi^{2}&=\sum\frac{(O-E)^2}{E}\\&=\frac{(70-84.24)^2}{84.24}+\frac{(79-62.4)^2}{62.4}+\frac{(7-9.36)^2}{9.36}\\&=7.4182\end{aligned}\)
And the degree of freedom is given by df = n-1, where, n is the sample size. Here, the sample size is 3.
\(\begin{aligned}df&=n-1\\&=3-1\\&=2\end{aligned}\)
Then, the P-value from the table is given by, \(P(\chi^{2} > 7.4182) = 0.0245\).
This value is less than the significance level. Therefore, the null hypothesis is rejected. So, an alternate hypothesis is accepted.
Therefore, nuthatches prefer particular types of trees while searching for seeds and insects.
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Jennifer made these measurements on ABC,BC must be-?
Answer:
between 10 and 12
Step-by-step explanation:
Given the measure of angles:
m∠B = 70°
m∠C = 60°
m∠A = 50°
We know m∠B = 70° because the sum of interior angles in a triangle is equal to 180°.Following this information, since the side lengths are directly proportional to the angle measure they see:
Angle B is the largest angle. Therefore, side AC is the longest side of the triangle since it is opposite of the largest angle.
Angle C is the smallest angle, so the side AB is the shortest side.
Therefore, side BC must be between 10 and 12 inches.
Solve the equation 7x+4=32
Answer:
x=4
Step-by-step explanation:
32-4=28
28÷7= 4
x=4
Answer:
Step-by-step explanation:
x=4
select the function that matches the graph
Answer:
I don't see a graph
Step-by-step explanation:
In the figure shown, L is the center of the circle and PQ is a chord of
the circle measuring 30 centimeters (cm).
L
8 cm
Q
M
30 cm
What is the length, in centimeters, of PL?
The length PL is 17 centimeters
How to calculate the length PL?From the complete question, we have:
LM = 8 cm
PQ = 30 cm
The length PL is then calculated using the following Pythagoras theorem
PL^2 = LM^2 + (PQ/2)^2
The equation becomes
PL^2 = 8^2 + (30/2)^2
Evaluate the sum
PL^2 = 289
Take the square root of both sides
PL = 17
Hence, the length PL is 17 centimeters
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Among all unbiased estimators that are weighted averages of Y1 ,..., Yn, the sample mean as an estimator of the population means is:
Select one alternative:
An estimator with lower sampling variances.
An estimator with a higher sampling variance.
The only consistent estimator.
The most unbiased estimator.
Among all unbiased estimators which are weighted averages of Y₁, ..., Yₙ, the sample mean as an estimator of population mean is an estimator with lower sampling variances.
The sample mean is known to be an unbiased estimator of the population mean.
Which means that on average, it provides an estimate that is equal to the true population mean.
However, when considering estimators that are weighted averages of the observations.
The sample mean tends to have lower sampling variances compared to other unbiased estimators.
Lower sampling variance is desirable because it indicates less variability in the estimates obtained from different samples.
A lower sampling variance implies that the sample mean is likely to be closer to the population mean, providing a more precise estimate.
Therefore, among unbiased estimators that are weighted averages, sample mean stands out as having a lower sampling variance.
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If there are 5,280 feet in a mile and 3,600 seconds in an hour, then a speed of 26 feet per second is closest to which of the following
Answer:
17.72\(\frac{miles}{hr}\)
Step-by-step explanation:
If you are trying to take 26 ft/s to being miles per hour this is how you do it.
26 \(\frac{ft}{s}\) * \(\frac{mile}{5280ft}\) *\(\frac{3600s}{hr}\)
so
17.72\(\frac{miles}{hr}\)
a pair of dice is rolled. what is the probability of each of the following events the usm of the ttwo bnumbers rolled is 8,9, or 10
The probability of rolling a pair of dice with the sum of the numbers on them being 8, 9, or 10 is 1/3.
When rolling a pair of dice, there are 36 possible outcomes.
Each die has six possible outcomes, which means that the pair of dice has 6 × 6 = 36 outcomes.
If we want to find the probability of rolling a pair of dice with the sum of the numbers on them being 8, 9, or 10, we can calculate it as follows:
Sum of 8:There are 5 ways to roll an 8: (2, 6), (3, 5), (4, 4), (5, 3), and (6, 2).
The probability of rolling an 8 is therefore 5/36.
Sum of 9:There are 4 ways to roll a 9: (3, 6), (4, 5), (5, 4), and (6, 3).
The probability of rolling a 9 is therefore 4/36.
Sum of 10:There are 3 ways to roll a 10: (4, 6), (5, 5), and (6, 4).
The probability of rolling a 10 is therefore 3/36.
To find the total probability of rolling a pair of dice with the sum of the numbers on them being 8, 9, or 10, we simply add the probabilities of each event:5/36 + 4/36 + 3/36 = 12/36 = 1/3
Therefore, the probability of rolling a pair of dice with the sum of the numbers on them being 8, 9, or 10 is 1/3. The required answer is 1/3
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6. A radio tower 200 ft high casts a shadow 75 ft long. What is the angle of elevation to
the top of the tower?
Answer:
Angle of elevation of the sun: 69 degrees
Step-by-step explanation:
tan(x) = 200/75
x = tan^-1 (200/75)
x = 69 degrees