Notice that:
\(\begin{gathered} -8=-1-7\times1, \\ -15=-1-7\times2, \\ -22=-1-7\times3, \\ -29=-1-7\times4. \end{gathered}\)Therefore, the nth term of the given sequence is given by the following rule:
\(S_n=-1-7\times n\text{.}\)Then:
\(S_{12}=-1-7\times12=-1-84=-85.\)Answer: Second option.
Starting at its rightmost position, it takes 1 second for the pendulum of a grandfather clock to swing a
horizontal distance of 12 inches from right to left, and 1 second for the pendulum to swing back from left to
right. Write a cosine function, d = acos(bt), to model the distance, d, of the pendulum from the center (in
inches) as a function of time t (in seconds)
a=
Answer:
Step-by-step explanation:
amplitude of oscillation a = 12 / 2 = 6 inches.
time period T = 2 s
b = angular frequency = 2π / T
= 2π / 2
= π
so putting the values in the equation
d = a cos ( b t )
d = 6 cos ( π t )
Answer:
there are two more questions and the answers are 0.5 is the least positive amount of the pendulum and 4.243=y when x=4.25
Step-by-step explanation:
I NEED HELP WITH STATISTICS
A. The null hypothesis H₀ and the alternative hypothesis H₁ are:
H₀: μ = 35 minutes H₁: μ > 35 minutes
B. If the consultant decides not to reject the null hypothesis, she might be making a Type II error.
C. A Type II error would be failing to reject the hypothesis that μ is = to 35 minutes when, in fact, μ is 43 minutes.
What is a Type II error?A Type II error occurs when the null hypothesis is false, but the test does not reject it.
In this case, the consultant would be concluding that the mean shopping time is 35 minutes, when in fact it is greater than 35 minutes.
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Some students are making muffins for a fundraiser. They have already made 80 muffins
and they can make 30 muffins in an hour. How many additional hours would they spend
to make 380 muffins?
Answer:
10 hours
Step-by-step explanation:
380 - 80 = 300
30 : 1 = 300 : x
x = 300 / 30
x = 10
What is the area of a square that has 2/4 units on each side
Answer:
1/4 of 0.25
Step-by-step explanation:
2/4 x 2/4 = 1/4
find the area of the polygonb
Answer:
A=b×h
A=3x5
A=15
ggggggggggg
9 x -5=
help!!! I am stuck
Answer:
-45 is the answer good luck
Answer:
-45 is your answer hope this helps
A hotel packed breakfast for each of the three guests. Each breakfast should have consisted of threeTypes of rolls, one each of nut, cheese and fruit rolls. The preparer wrapped each of the nine rollsand once wrapped, the rolls were indistinguishable from one another. She then randomly put threerolls in a bag for each of the guests. If the probability that each guest got one roll of each type ism/n where m and n are relatively prime integers, find the value of (m+n).
The probability that each guest got one roll of each type is 3/1, which is a fraction with a numerator of 3 and a denominator of 1. Since the numerator and denominator are relatively prime integers, the value of m + n is 3
The equation for the probability that each guest got one roll of each type is m/n, where m and n are relatively prime integers.
We can expand this equation to
m/n
= 3/1.
Since the numerator and denominator are relatively prime integers, we can solve for m + n by multiplying both sides of the equation by 1.
Multiplying both sides of the equation by 1 gives us
m + n = 3.
Therefore, the value of
m + n is 3.
Let m = numerator and n = denominator in the probability of m/n.
Given that each guest got one roll of each type, the probability is m/n.
The numerator and denominator are relatively prime integers, so m and n have no common factors.
Therefore,
m + n = 3.
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One cylinder has a volume that is 8 Centimeters cubed less than StartFraction 7 over 8 EndFraction of the volume of a second cylinder. If the first cylinder’s volume is 216 Centimeters cubed, what is the correct equation and value of x, the volume of the second cylinder?
StartFraction 7 over 8 EndFraction x + 8 = 216; x = 182 centimeters cubed
StartFraction 7 over 8 EndFraction x minus 8 = 216; x = 196 centimeters cubed
StartFraction 7 over 8 EndFraction x + 8 = 216; x = 238 centimeters cubed
StartFraction 7 over 8 EndFraction x minus 8 = 216; x = 256 centimeters cubed
Answer:
7/8X-8=216
x=256
7/8x-8=216
+8 +8
7/8x=224
7/8 7/8
x=256
Step-by-step explanation:
Triangle TUV is dilated by a scale factor of \frac{1}{3} 1/3
to form triangle T'U'V'. Side U'V' measures 33. What is the measure of side UV?
The measure side UV will equal 11 if triangle TUV is dilated by a scale factor 1/3 having a side U'V'=33.
What is the scale factor?The scale factor is the ratio of the length of a side of one figure to the length of the corresponding side of the other figure. It is a process of enlarging the image of an object by some factor.
here we have the scale factor
\(Scale \ Factor=\dfrac{1}{3}\)
Since the triangle, TUV is dilated by the scale factor 1/3 then the sides of triangle will also be in the same dilation so we can write.
\(\dfrac{1}{3}=\dfrac{UV}{U'V'}\)
\(\dfrac{1}{3}=\dfrac{UV}{33}\)
\(UV=11\)
Hence the measure side UV will equal 11 if triangle TUV is dilated by a scale factor 1/3 having a side U'V'=33.
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11(-2x + 3) show work please
Answer:
11×-2x= -22
11×3= 33
-22+33=11
11x
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17 Billie deposited three paychecks, one was $435.20 , one was $ 510.20 and the third one was $ 345.12 plus $142 cash into her checking account Her original balance was $ 225.30. Assuming all the checks clear, how much will be in his checking account after the deposits are made?
Answer:
$1,657.82
Step-by-step explanation:
435.20 + 510.20 + 345.12 + 142 + 225.30 = total checking balance
1,657.82
Arrange the steps in order to simplify the expression
Answer:
Step-by-step explanation:
For step explanation:
1. write the problem
2. distinguishing the neg sign
3. distributing 3
4. moving like terms next to each other through commutative property
5. Combining like terms
6. getting rid of parentheses
jamie uses 54 buttons to make shirts. jamie uses 6 buttons to make each shirt. how many shirts did she make?
Answer: 9 shirts I think
Step-by-step explanation: 54/6=9
In a multiple choice quiz there are 5 questions and 4 choices for each question (a, b, c, d). Robin has not studied for the quiz at all, and decides to randomly guess the answers. What is the probability that
Answer:
\(Pr = 0.140625\)
Step-by-step explanation:
Given
\(n = 5\) --- questions
\(options = 4\) ---- a, b, c or d
Required
The probability that 1st correct question is the 3rd
The probability of selecting the right answer is:
\(p = \frac{1}{options}\)
\(p = \frac{1}{4}\)
\(p = 0.25\)
Using complements, we have:
\(q = 1-p\)
\(q = 1-0.25\)
\(q = 0.75\) --- probability of selecting the wrong answer
The required probability is represented as:
Pr = First is wrong * Second is wrong * Third is correct
\(Pr = q * q * p\)
This gives
\(Pr = 0.75 * 0.75 * 0.25\)
\(Pr = 0.140625\)
Given the right triangle shown, solve for X, Y and Z. The triangle may not be drawn to scale
Answer:
X ≈ 8.58 ftY ≈ 9.46 ftZ = 65°Step-by-step explanation:
The mnemonic SOH CAH TOA is intended to help you remember the relationships between sides of a right triangle and trig functions of the acute angles. It tells you ...
Sin = Opposite/HypotenuseCos = Adjacent/HypotenuseTan = Opposite/AdjacentSidesThe given triangle shows values of an acute angle and its opposite side. You are to find the other two sides in the triangle, as well as the other acute angle.
X is the side adjacent to the given angle, so the relevant trig relation is ...
Tan = Opposite/Adjacent
tan(25°) = (4 ft)/X
Solving for X gives ...
X = (4 ft)/tan(25°) . . . . . . . . multiply by X/tan(25°)
X ≈ 8.58 ft
Y is the hypotenuse, so the relevant trig relation is ...
Sin = Opposite/Hypotenuse
sin(25°) = (4 ft)/Y
Y = (4 ft)/sin(25°) . . . . . . multiply by Y/sin(25°)
Y ≈ 9.46 ft
AngleThe sum of angles in a triangle is 180°, so if one of them is 90°, the sum of the other two is 90°.
Z = 90° -25°
Z = 65°
erica planted 8 cucumber plants each plant had 37 green cucumbers. how many cucumbers are the 8 plants altogether
Answer:
296
Step-by-step explanation:
8 plants × 37 on each = 296 cucumbers
Answer: 296
If you multiply the 37 green cucumbers each by the 8 cucumber plants they grew from, you'd end up with 296 green cucumbers altogether.
Select the correct answer.
A drugstore sells vitamins in bottles with different pill counts. The price of each bottle is shown in the table below.
Price
Number of
Pills
50
100
150
$1.85
$3.70
$5.55
$7.40
$9.25
200
250
About how much does one vitamin cost?
$1.85
$0.37
$0.92
$0.04
$0.02
Answer:
Step-by-step explanation:
The approximate cost of one vitamin is $0.04 thus option (A) is correct.
What are the ratio and proportion?The ratio is the division of the two numbers.
For example, a/b, where a will be the numerator and b will be the denominator.
Proportion is the relation of a variable with another. It could be direct or inverse.
As per the given number of pills and cost.
The cost per pill from the first raw = $2.05/50 = $0.041
The cost per pill from the second raw = $4.10/100 = $0.041
The cost per pill remains constant in all so this is a direct proportion.
Hence "The approximate cost of one vitamin is $0.04".
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The complete structured question is below,
2 over 3 divided by 6
Answer:
1/9
Step-by-step explanation: This is because 2/3 then you divide by 6 to get 1/6.
Gas right now is $ 2.99 per gallon !! AH !!! How much will it clllost to fill the tank of my car that holds 9 gallons ?
Show all work...
Answer:
$26.91
Step-by-step explanation:
Multiply $2.99 with 9.
Reason is that its $2.99 a gallon for gas and you need 9 gallons to fill up your vehicle
That equals $26.91.
Answer:
$26.91
Step-by-step explanation:
Since 1 gallon costs $2.99, multiply 2.99 by 9.
2.99 x 9
= $26.91
It will cost you $26.91 to fill up your tank that holds 9 gallons.
Samples of laboratory glass are in small, light packaging or heavy, large packaging. Suppose that 2% and 1% of the sample shipped in small and large packages, respectively, break during transit. If 58% of the samples are shipped in large packages and 42% are shipped in small packages, what proportion of samples break during shipment
Answer:
Total proportion of samples that break during shipment \(1.42\) %
Step-by-step explanation:
Let the total number of glasses shipped is equal to \(100\)
\(58\) % of the glasses are shipped in large packets \(\frac{58}{100}*100 = 58\)
\(42\) % of the glasses are shipped in small packets \(\frac{42}{100}*100 = 42\)
Number of broken glasses in small package \(= \frac{2}{100} * 42 = 0.84\)
Number of broken glasses in large package \(= \frac{1}{100} * 58 = 0.58\)
Total proportion of samples that break during shipment
\(\frac{0.84 + 0.58}{100} *100 = 1.42\) %
27% of all college students major in STEM (Science, Technology, Engineering, and Math). If 35 college students are randomly selected, find the probability that
a. Exactly 9 of them major in STEM.
b. At most 11 of them major in STEM.
c. At least 11 of them major in STEM
The probability of getting exactly 9 of them major in STEM is 0.139 or 13.9%.
The probability of getting at most 11 of them major in STEM is approximately 0.898 or 89.8%.
The probability of getting at least 11 of them major in STEM is approximately 0.318 or 31.8%.
a. Exactly 9 of them major in STEM.
In this case, the probability of success (a student majoring in STEM) is 0.27, and the number of trials is 35. The probability of exactly 9 students majoring in STEM is then given by the formula:
P(X = 9) = (35 choose 9) x (0.27)⁹ x (0.73)²⁶
where (35 choose 9) is the number of ways to choose 9 students out of 35, and (0.27)⁹ x (0.73)²⁶ is the probability of 9 successes and 26 failures. Evaluating this expression gives a probability of approximately 0.139 or 13.9%.
b. At most 11 of them major in STEM.
To calculate the probability that at most 11 students out of 35 major in STEM, we can use the cumulative binomial probability distribution. This distribution calculates the probability of at most X successes, where X is any number from 0 to the total number of trials.
The probability of at most 11 students majoring in STEM can be calculated as follows:
P(X <= 11) = P(X = 0) + P(X = 1) + ... + P(X = 11) = 0.898 or 89.8%.
c. At least 11 of them major in STEM.
The probability of less than 11 students majoring in STEM can be calculated using the cumulative binomial probability distribution, as in part (b). Specifically:
P(X < 11) = P(X = 0) + P(X = 1) + ... + P(X = 10)
Subtracting this probability from 1 gives the probability of at least 11 students majoring in STEM:
P(X >= 11) = 1 - P(X < 11) = 31.8%
Again, we can use the binomial distribution formula from part (a), or a binomial probability calculator or statistical software package to calculate this probability.
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if 3 = 1/2gt^2, make t the subject of the formula
Answer:
t = √1.5/g
Step-by-step explanation:
1/2gt^2 = 3
Divide both sides by 1/2
gt^2 = 1.5
Divide both sides by g
t^2 = 1.5/g
Square root both sides
t = √1.5/g
Ricardo planea comprar una pantalla plana que cuesta 18,485 pesos por el momento sólo tiene 9597 cuánto dinero le falta
La cantidad de dinero que le falta a Ricardo es 8,888 pesos.
¿Cuanto dinero le falta para comprar la pantalla plana?Sabemos que Ricardo planea comprar una pantalla plana que cuesta 18,485 pesos por el momento sólo tiene 9,597 pesos, y queremos ver cuanto dinero le falta.
Para ver esto, debemos tomar la diferencia entre el valor de la pantalla plana y la cantidad de dinero que Ricardo tiene, entonces tendremos:
18,485 pesos - 9,597 pesos = 8,888 pesos.
Entonces concluimos que Ricardo necesita 8,888 pesos para la pantalla plana.
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A motivationql speaker writes at a cinstant rate of 1/2 speech every 3/4 hour. At this rate, what frqction represents the number of speeches the speaker writes per hour?
Answer:
They can write 3\4 of a speech in 1 hour
Step-by-step explanation:
Half of a half is 2/3 Split that in half and get 3\4
You estimate that your school is about 60 ft tall. Your school is actually 67 ft tall. Find the percent error in your estimation.
Answer:
%10.44
Step-by-step explanation:
1) 67-60=7
2)7÷67=0.1044776
Round it and change it to percent
=%10.44
Find the value of x such that l ⊥ m. A) 10.7 B) 16 C) 46 D) 48
Answer:
B. 16°Step-by-step explanation:
The diagram lacks the appropriate figure. Find the figure attached. If the line I is perpendicular to m, this means that the sum of the given angles will be equal to 90° as shown;
(3x+5)° + 37° = 90°
open the parenthesis
3x+5 + 37° = 90°
3x+42 = 90
subtract 42 from both sides of the equation
3x+42-42 = 90-42
3x = 48
Divide both sides of the resulting equation by 3;
3x/3 = 48/3
x = 16
Hence the value of x is 16°
At a game show, there are 7 people (including you and your friend) in the front
row.
The host randomly chooses 3 people from the front row to be contestants.
The order in which they are chosen does not matter.
There are 7C3 = 35 total ways to choose the 3 contestants.
What is the probability that you and your friend are both chosen?
ОА 2/3
O B.
3/35
OC.
2/35
O D.
5/35
Answer:
There are a total of 5/35 ways that you and your friend are both chosen
Step-by-step explanation:
ap3x
Find the value of x.
Answer:
These x-values are known as the “roots” or “zeros” of the quadratic. To find these roots, we simply set the quadratic equal to zero and solve for x
Step-by-step explanation:
Write the equation of the line. Slope = -4, passing through (- 1, 5)
Answer:
y=-4x+1
Step-by-step explanation:
You want to find the equation for a line that passes through the point (-1,5) and has a slope of -4.
First of all, remember what the equation of a line is:
y = mx+b
Where:
m is the slope, and
b is the y-intercept
To start, you know what m is; it's just the slope, which you said was -4. So you can right away fill in the equation for a line somewhat to read:
y=-4x+b.
Now, what about b, the y-intercept?
To find b, think about what your (x,y) point means:
(-1,5). When x of the line is -1, y of the line must be 5.
Because you said the line passes through this point, right?
Now, look at our line's equation so far: . b is what we want, the -4 is already set and x and y are just two "free variables" sitting there. We can plug anything we want in for x and y here, but we want the equation for the line that specfically passes through the the point (-1,5).
So, why not plug in for x the number -1 and for y the number 5? This will allow us to solve for b for the particular line that passes through the point you gave!.
(-1,5). y=mx+b or 5=-4 × -1+b, or solving for b: b=5-(-4)(-1). b=1.
The equation of line passes through the point (-1, 5) will be;
⇒ y = - 4x - 2
The equation of line in point-slope form passing through the points
(x₁ , y₁) and (x₂, y₂) with slope m is defined as;
⇒ y - y₁ = m (x - x₁)
Where, m = (y₂ - y₁) / (x₂ - x₁)
Given that;
The point on the line are (-1, 5).
And, The slope of line is,
⇒ m = - 4
Now,
Since, The equation of line passes through the point (- 1, 5).
And, Slope of the line is,
m = - 4
Thus, The equation of line with slope - 4 is,
⇒ y - 5 = - 4 (x - (-1))
⇒ y - 2 = - 4 (x + 1)
⇒ y - 2 = - 4x - 4
⇒ y = - 4x - 4 + 2
⇒ y = - 4x - 2
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A new blood pressure medication has been manufactured and a study is being conducted to determine whether its effectiveness depends on dose. When 50 milligrams of the medication was administered to a simple random sample (SRS) of 40 patients, 12 of them demonstrated lower blood pressure. When 100 milligrams of the medication was administered to another SRS of 35 patients, 14 of them demonstrated lower blood pressure. Which of the following test statistics is an appropriate hypothesis test?
a z-test for the proportional difference is the proper hypothesis test.
What is the deviation in proportions?A hypothesis test can be used to find whether the deviation in proportions impacts the medication's effectivity. We may compare the secondary hypothesis—that the proportions are different—to the null hypothesis.
which states that the dimension of patients who show cut down blood pressure is the same for the two doses of the drug (50 mg and 100 mg).
Popular test statistics like the z-test can be applied to this hypothesis test and other statistical analyses.
\(z = (p1 - p2) / SE\)
where p1 and p2, for the 50 mg and 100 mg doses, respectively, are the sample proportions of patients who show fallen blood pressure, and SE is the standard error of the difference between the proportions.
the samples are assumed to be independent or dependent, impacts the SE formula. The samples in this instance are presumed to be independent because they came from various patients. Consequently, the equation for SE is:
\(SE = \sqrt(p1 \times (1 - p1)/n1 + p2 *\times(1 - p2)/n2)\)
here, the sample sizes for two doses is n1 and n2.
We can compute the z-test statistic based on the sample sizes and proportions and compare the result to a critical value or p-value to decide whether to accept or reject the null hypothesis.
Therefore, a z-test for the proportional difference is the proper hypothesis test.
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