Answer:
2x3=812
4x5=1620
then
6x7=2428
description
2x400+3x4=812
4x400+5x4=1620
6x400+7x4=2428
the answer is 2428
Mr. Matthews gives each of his 32 students 15 minutes to
present a book report to the class. How many minutes
will it take for all of his students to present their reports?
Answer:
480 minutes or 8 hours
Step-by-step explanation:
1 student = 15 minutes
32 students = x
x= 32 students *15 minutes
x= 480 minutes
480 minutes it takes for all of his students to present their reports.
What is Unitary Method?The unitary technique involves first determining the value of a single unit, followed by the value of the necessary number of units.
For example, Let's say Ram spends 36 Rs. for a dozen (12) bananas.
12 bananas will set you back 36 Rs. 1 banana costs 36 x 12 = 3 Rupees.
As a result, one banana costs three rupees. Let's say we need to calculate the price of 15 bananas.
This may be done as follows: 15 bananas cost 3 rupees each; 15 units cost 45 rupees.
Given:
Total Students= 32
Each student can take = 15 minutes.
So, time taken by 32 students
= 32 x 15
= 480 minutes.
Hence, students take 480 minutes to complete the report.
Learn more about Unitary Method here:
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2
+
Select the correct answer.
Consider this equation.
cos(8) =
if 8 is an angle in quadrant iv, what is the value of tan();
Ο Α.
8
« B.
C.
V17
Answer:
D. -[tex]\sqrt{17}[/tex]/8
Step-by-step explanation:
Draw a right triangle such that cos (theta) = 8/9. That means the hypotenuse = 9 and the adjacent side to theta = 8
Use the Pythagorean theorem to find the opposite side to theta
[tex]\sqrt{9^{2} - 8^{2} } = \sqrt{81 - 64} = \sqrt{17}[/tex]
tan (theta) = [tex]\sqrt{17}[/tex]/8
Since theta is in quadrant IV, the tan is negative. So, tan (theta) = -[tex]\sqrt{17}[/tex]/8
After considering the equation. Assuming 8 is an angle in quadrant iv, the value of tan(Ф) is:√17/8
Value of tan(Ф)Given:
Equation=cos(Ф)=8/9
Using pythagorean theorem formula
H²=P²+B²
Where:
B=8
H=9
Let plug in the formula
P²=9²-8²
P=√81-64
P=√17
Since 8 is an angle in quadrant iv. Hence:
Value of TanФ=√17/8
Inconclusion the value of tan(Ф) is:√17/8
Learn more about value of tan(Ф) here:https://brainly.com/question/12561549
Select the FALSE statement regarding the relationship between sampling error and sample size. a.) As a sample size decreases, the standard deviation increases. b.) An estimate becomes more accurate as you increase the sample size. c.) You can resolve poor data collection by increasing the sample size. d.) Increasing the sample size will decrease the sampling error.
Answer:
Option C
Step-by-step explanation:
The standard deviation of any sample is inversely proportional to the size of the sample. Thus, as the sample size increases, the standard deviation reduces or vice versa. Thus, option A is in correct
As the sample size increases, the confidence in estimate also increases Hence, option B is also incorrect
Option D is true to its words , hence it is also a wrong choice for this question
Hence, option C is correct
Answer:
You can resolve poor data collection by increasing the sample size
Step-by-step explanation:
A shirt costs $98.
It is 20% off
What is the amount
I will save ?
Answer:
$19.60 would be saved (off full price)
Step-by-step explanation:
The discount (savings) would be 0.20($98), or $19.60.
Find the distance between the points (7,4) and(-2,-8)
[tex] \huge \mathcal{Answer࿐}[/tex]
Distance Formula :
[tex]\large \boxed{ \sqrt{(x_2 - x_1) {}^{2} + (y_2 - y_1) {}^{2}}}[/tex]
Solution :[tex] \sqrt{(7 - (-2)) {}^{2} + (4 - (- 8)){}^{2}} [/tex][tex] \sqrt{ {9}^{2} + {12}^{2} } [/tex][tex] \sqrt{81 + 144} [/tex][tex] \sqrt{225} [/tex][tex]15[/tex]Conclusion :Distance between the points is 15 units
_____________________________
[tex]\mathrm{ \#TeeNForeveR}[/tex]
please help me i really need this
Answer:
1. pi or π
2. 7,234.6
3. 26.4
4. 94.2
hope it helped :)
Step-by-step explanation:
Find the value of the expression.
[(3/5)0]-2
the value is [___]
Answer:
1
Step-by-step explanation:
Any number to the power of zero is 1You can flip[tex] {1}^{ - 2} [/tex]to [tex] \frac{1}{ {1}^{2} } [/tex] which is 1the product of a number and twice itself is 32
is it 8,4
What is 103% of 127?
Answer:
130.81
Step-by-step explanation:
127 ⋅ ( 103/ 100 ) =130.81
Which graph represents the solution?
Answer:
A
Step-by-step explanation:
Given the inequality :
v + 4 > 2 and 8v - 20 < 36
v + 4 > 2
v > 2 - 4
V > - 2
8v - 20 < 36
8v < 36 + 20
8v < 56
v < 56/8
v < 7
Hence,
v > - 2 and v < 7
-2 < v < 7
plz help I need it in less then 10 min
16=x'2
Answer
x=8
Step-by-step explanation:
16=x×2
x=16/2
X=8
MARK ME BRAINLIST
-5 3/4 - 3 1/2 =?
A)2 1/4
B)-9 1/4
C)-2 1/4
D)-8 2/3
Answer:
-9 1/4
Step-by-step explanation:
-5 3/4 - 3 1/2
Get a common denominator
-5 3/4 - 3 1/2 *2/2
-5 3/4 - 3 2/4
-8 5/4
Rewritng
-8 4/4 - 1/4
-9 1/4
What is
6+√36
pleaseeeee
Answer:
The answer is 12
Step-by-step explanation:
6+the root of 36 =12
Two of the statements are true; one is a lie.
Select the one that is a lie.
Then explain your reasoning.
∠GAF ≌ ∠TAE.
∠TAE and ∠FAH are complementary.
∠TAF is obtuse.
Answer:
∠GAF ≌ ∠TAE is lie
Step-by-step explanation:
∠GAF ≌ ∠TAE is lie
both are not push back angles.
Sameer chose 12 different toppings for his frozen yogurt sundae, which was Three-fourths of the total number of different toppings available at the make-your-own sundae shop
Answer:
You have 16 different toppings
Step-by-step explanation:
Given
[tex]Sameer = 12[/tex]
Required
How many topping at your sundae shop
From the question, we understand that Sameer's is3/4 of your toppings
Mathematically, this is:
[tex]Sameer = \frac{3}{4} * Y[/tex]
Where
Y represents You
Make Y the subject
[tex]Y = \frac{4}{3} * Sameer[/tex]
Substitute 12 for Sameer
[tex]Y = \frac{4}{3} * 12[/tex]
[tex]Y = 4 * 4[/tex]
[tex]Y = 16[/tex]
Researchers are studying the distribution of subscribers to a certain streaming service in different populations. From a random sample of 200 people in City C, 34 were found to subscribe to the streaming service. From a random sample of 200 people in City K, 54 were found to subscribe to the streaming service. Assuming all conditions for inference are met, which of the following is a 90% confidence interval for the difference in population proportions (City C minus City K) who subscribe to the streaming service?
A. (0.17 – 0.27) + or - 1.65 underroot 0.17/200 + 0.27/200.
B. 0.17 – 0.27) + or -1.96 underroot (0.17)(0.83) + (0.27)(0.73)/400
C. 0.17 – 0.27) + or - 1.65 underroot (0.17)(0.83) + (0.27)(0.73)/400
D. (0.17 – 0.27) + or - 1.96 underroot (0.17)(0.83) + (0.27)(0.73)/200
E. (0.17 – 0.27) + or - 1.65 underroot (0.17)(0.83) + 0.27)(0.73)/200
Answer:
[tex](0.17 - 0.27) \pm 1.65\sqrt{\frac{0.17*0.83 + 0.27*0.73}{200}}[/tex], that is, option C
Step-by-step explanation:
From a random sample of 200 people in City C, 34 were found to subscribe to the streaming service. From a random sample of 200 people in City K, 54 were found to subscribe to the streaming service.
This means that the proportions are:
[tex]p_C = \frac{34}{200} = 0.17[/tex]
[tex]p_K = \frac{54}{200} = 0.27[/tex]
Subtraction of proportions:
In the confidence interval, we subtract the proportions. So:
[tex]p = p_C - p_K = 0.17 - 0.27[/tex]
In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.
[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
In which
z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].
Standard error:
For a subtraction, as the standard deviation of the distribution is the square root of the sum of the variances, we have that:
[tex]\sqrt{\frac{\pi(1-\pi)}{n}} = \sqrt{\frac{0.17*0.83 + 0.27*0.73}{200}}[/tex]
90% confidence level
So [tex]\alpha = 0.1[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.1}{2} = 0.95[/tex], so [tex]Z = 1.645[/tex].
So the confidence interval is:
[tex](0.17 - 0.27) \pm 1.65\sqrt{\frac{0.17*0.83 + 0.27*0.73}{200}}[/tex], that is, option C
the volume of the cone shown below is 108pie cm^3. What is the value of H?
Use V=1/3PIE r^2 for the volume of a cone
Answer:
h = 4cm
Step-by-step explanation:
Diameter = 18cm
Radius = Diameter/2 = 18/2 = 9cm
V = 1/3*pi*r^2*h
We know that the volume is 108pi cm^3. We can just plug in 108pi cm^3 for V and we also know that our Radius (r) is 2.
So,
108 pi = 1/3*pi*9^2*h
108 pi = (81pi*h)/3
multiply 3 from both side
108pi*3 = (81pi*h)/3 *3
324pi = 81pi*h
Now divide the 81pi from both side
324pi/81pi = (81pi*h)/81pi
4 = h
So the height is 4cm
Answer:
h = 4cm
Step-by-step explanation:
Diameter = 18cm
Radius = Diameter/2 = 18/2 = 9cm
V = 1/3*pi*r^2*h
We know that the volume is 108pi cm^3. We can just plug in 108pi cm^3 for V and we also know that our Radius (r) is 2.
So,
108 pi = 1/3*pi*9^2*h
108 pi = (81pi*h)/3
multiply 3 from both side
108pi*3 = (81pi*h)/3 *3
324pi = 81pi*h
Now divide the 81pi from both side
324pi/81pi = (81pi*h)/81pi
4 = h
So the height is 4cm
Find the value that makes the proportion true
5/6= ?/180
Answer:
D, or 150
Step-by-step explanation:
We can see that we have to multiply 6 by 30 to get 180. So, if we multiply the denominator by this and we want an equal fraction, we can multiply 5 by 30 to get [tex]5\cdot30=150[/tex].
Answer/Step-by-step explanation:
I think its "D. 150"!
-Hope this helped, Comment if you have any other questions!
100 pts
Read the following email:
Dear Dr. Jones,
Our pharmaceutical company now received 47 complaints about the new pain reliever NoPain, created in your lab. Of the 47 complaints, 24 said their headache got worse, 15 said they had severe cramping after taking the medication, and 8 said they had both problems. We have only been distributing this pain reliever for about 30 days and we are very
concerned. It has cost our company roughly 1.2 million dollars to create the drug and we have recorded sales of $98,600 in the past month at $10 a bottle, so that is 9,860 bottles. Should we be concerned? Do you think we should pull the product and conduct more
research? We may end up losing money on this if we pursue this course of action. Should we keep the product on the shelves and secretly do more research? Or should we just do nothing for the time being, wait it out, and see what happens? Please get back to us as soon as possible with your recommendation.
Thank you,
Jane Smith
Head of Customer Relations
Using your basic mathematical skills, calculate how long it will take the pharmaceutical
company to earn back the amount that it had invested, if it continues to sell the product at the
current selling rate.
The possible value of x?
Answer:
x = 7 and x = 5
Step-by-step explanation:
12x - 35 = x²
x² - 12x + 35 = 0
(x - 7)(x - 5) = 0
x = 7 and x = 5
In the figure to the right, what is the measure of angle DAC ?
I’m not going to show answer Options because I don’t want anyone to put something random
Don’t put links cs I’m not going to press it <3
Answer:
47 degrees
Step-by-step explanation:
i am super smart
2. Celesta used to spend 90 minutes a day on the phone. Now she spends
60 minutes a day. What is the PERCENT DECREASE? *
Answer:
33%
Step-by-step explanation:
sorry my bad i did percentage increase.
Which of the following is a geometric sequence? *
O -1, -3,9,27,...
0 -1,2 -4,8....
O 1,4,9,16,...
O 1,3,5,7,...
If tan theta = 7/2 and 0
Answer:
[tex]\theta= 74.05^{o} (2dp),\\\theta= 0^{o}.\\[/tex]
Step-by-step explanation:
[tex]tan \theta=\frac{7}{2}, \\\theta= tan^{-1}(\frac{7}{2}) = 74.05^{o} (2dp),\\\theta= tan^{-1}(0) = 0^{o},\\[/tex]
ILL GIVE BRAINLEST, please show work :)
Answer:
the answer would be 35.7 the reason why is because your multiplying the width by its heigh
Step-by-step explanation:
4.2x8.5=35.7
In a random sample of 74 homeowners in a city, 22 homeowners said they would
support a ban on nonnatural lawn fertilizers to protect fish in the local waterways. The sampling
method had a margin of error of ±3.1%. SHOW ALL WORK!
A) Find the point estimate.
B) Find the lower and upper limits and state the interval.
Answer:
12
Step-by-step explanation:
The quotient of a number and two, increased by five, is 3.
Answer:
the quotient is -4
Step-by-step explanation:
Starting from zero, zero divided by anything is 0. The main concept here is not to divide anything by 0 and just straight of add by 5 because there would be more than one answer for the quotient. I know that 2+3=5 but but I know that my quotient would be smaller than 0 but add up to 3 when I divide it in half and add 5. -4/2=-2 plus 5 is equal to 3. 5>-2 so my answer would be positive.
Evaluate 14 + (44+ 7) + 4^3*
HELP ME ASAP
NO LINKS OR FILES
Answer:
129
Step-by-step explanation:
44+7=51
4^3=64
14+51+64=129
Beth has a box containing music CDs. Each CD contains songs from only one of these three genres: pop (P), hip-hop (H), and rock (R). She picks one CD from the box, replaces it, and then picks another CD. The sample space for this event is listed.
P-P H-P R-P
P-H H-H R-H
P-R R-R
What is the missing term for this compound event? What is the sample size?
A.
The missing term is H-P, and the sample size is 9.
B.
The missing term is H-R, and the sample size is 9.
C.
The missing term is H-P, and the sample size is 3.
D.
The missing term is H-R, and the sample size is 3.
Answer:
B). The missing term is H-R, and the sample size is 9.
Step-by-step explanation:
Compound event is characterized as the likelihood of occurring two autonomous events at least one or more than one probable outcome.
As per the details provided, 'the term that is omitted in the given event of the compound would be (H-R) and the size of the sample would be 9(' including this missing one. The eight combination possibilities of the CDs have already been provided and thus, the last one would be 'H-R'(hip-hop and rock music CDs). This is why the total number of possibilities turns 9. Thus, option B is the correct answer.
Answer: the answer is B :)
Step-by-step explanation:
(a) 14x - 3x + 16 = 7(x - 4)
Solve the linear equation
Answer:
x=-11
Step-by-step explanation:
14x-3x+16=7(x-4)
Distribute
14x-3x+16= 7(x) + 7(-4)
14x-3x+16=7x-28
Combine Like Terms
11x+16=7x-28
Combine like terms
4x+16=-28
Combine like terms
4x=-44
Isolate x
x=-44/4
Simplify
x=-11
If this helps please mark as brainliest