Answer:
66
Step-by-step explanation:
So 1320 divided by 20 equals 66. so there would need to be 66 campers on each bus to get all of them to the summer retreat.
What is the probability In a standard 52-card deck, Jacks (J), Queens (Q), and Kings (K) are considered face cards. If a card is selected from a well-shuffled deck, find the probability that the card is a face card.
Answer:
3/13
Step-by-step explanation:
No. of face cards = 3 x 4 = 12
Total cards = 52
P (face) = 12/52
= 6/26
= 3/13
Answer:
4/14 that's the answer ok ok
Becky and Carla take an advanced yoga class. Becky can hold 29% of her poses for over a minute, while Carla can hold 35% of her poses for over a minute. Suppose each yoga student is asked to hold 50 poses. Let B = the proportion of poses Becky can hold for over a minute and C = the proportion of poses Carla can hold for over a minute. What is the probability that Becky’s proportion of poses held for over a minute is greater than Carla’s?
Using the normal distribution and the central limit theorem, it is found that there is a 0.2033 = 20.33% probability that Becky’s proportion of poses held for over a minute is greater than Carla’s.
Normal Probability DistributionIn a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
It measures how many standard deviations the measure is from the mean. After finding the z-score, we look at the z-score table and find the p-value associated with this z-score, which is the percentile of X.By the Central Limit Theorem, for a proportion p in a sample of size n, the sampling distribution of sample proportion is approximately normal with mean [tex]\mu = p[/tex] and standard deviation [tex]s = \sqrt{\frac{p(1 - p)}{n}}[/tex], as long as [tex]np \geq 10[/tex] and [tex]n(1 - p) \geq 10[/tex].For each sample, we have that:
[tex]p_B = 0.29, s_B = \sqrt{\frac{0.29(0.71)}{50}} = 0.046[/tex]
[tex]p_C = 0.35, s_C = \sqrt{\frac{0.35(0.65)}{50}} = 0.057[/tex]
For the distribution of the difference of the proportions of Becky and Carla, we have that:
[tex]\mu = p_B - p_C = 0.29 - 0.35 = 0.06[/tex]
[tex]s = \sqrt{s_B^2 + s_C^2} = \sqrt{0.046^2 + 0.057^2} = 0.073[/tex]
The probability that Becky’s proportion of poses held for over a minute is greater than Carla’s is the probability that the subtraction is above 0, that is, 1 subtracted by the p-value of Z when X = 0, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
By the Central Limit Theorem
[tex]Z = \frac{X - \mu}{s}[/tex]
[tex]Z = \frac{0 + 0.06}{0.073}[/tex]
[tex]Z = 0.82[/tex]
[tex]Z = 0.82[/tex] has a p-value of 0.7967.
1 - 0.7967 = 0.2033.
0.2033 = 20.33% probability that Becky’s proportion of poses held for over a minute is greater than Carla’s.
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simplify the following ratio R5,75:25cents
Answer:
3:1
Step-by-step explanation:
75:25
(25×3):(25×1)
=3:1
( would love if you could mark me the brainliest :))
The ratio after simplify the provided ratio R, 75:25 cents, which is equivalent ratio of this ratio is 3:1.
What is a ratio of two numbers?The ratio of two number is the fraction part, which represent that how a number is more or less compare to the other.
When we simplify and write ratio of two number, we get the equivalent ratio of the original ratio.
The equivalent ratio is the ratio which is same in the value as the original ratio, but the numerator and denominator is different for both the ratios.
Here, the given ratio in the problem is 75:25 cents. It can be written as,
[tex]R_5=\dfrac{75}{25}\\[/tex]
As, the number 25 can divide the number 75 in three times. Thus, the ratio will become after simplifying the given ratio as,
[tex]R_5=\dfrac{3}{1}\\[/tex]
Hence, the ratio after simplify the provided ratio R, 75:25 cents, which is equivalent ratio of this ratio is 3:1.
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Which of the following is not a linear function?
Consider the angle , which is labeled as in blue on the graph, with corresponding point on the circle.
Sketch each of the angles given below, then select the point on the circle that best corresponds to the angle.
The point on the circle that corresponds to the angle will be:
π/2 = point Aπ - point D3π/2 = point EHow to illustrate the angleFrom the complete question, the point on the circle that best corresponds to the angle is illustrated above.
Also, the least positive angle that is coterminal with 747° will be:
= 747 - 720
= 27°
The least positive angle that is coterminal with 1074° will be:
= 1074 - 720
= 354°
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PLS HELP IM BEING TIMED 2 FOR BRAINLIEST
Phyllis is going ice skating.
• the cost to rent figure skates for x hours is given by the function
f(x) = 1.50x + 2.00.
• the cost to rent hockey skates for x hours is given by the function
h(x) = 2.00x +1.50.
If phyllis rents skates for 3 hours, how much cheaper would figure skates be than
hockey skates?
(Note: Express the answer as dollars.cents.
Answer:
figure skates will be $1 cheaper.
Explanation:
given equation:
to rent figure skates : f(x) = 1.50x + 2to rent hockey skates : h(x) = 2x +1.5solve for rent of figure skates:
f(x) = 1.50x + 2.00
f(3) = 1.50(3) + 2.00
f(3) = 6.5
solve for rent of hockey skates:
h(x) = 2x + 1.5
h(3) = 2(3) +1.5
h(3) = 7.5
cheaper - figure skates than hockey skates:
$7.5 - $6.5
$1
ion
ranco
7. Salina finds the range of the function
y = -4x2 + 8x + 7 by calculating the vertex.
Her work is shown in the box below.
Determine her error and find the range of the
function.
4
6
8
vertex: ( 1, 11)
range: y = 11
©Maneuvering the Middle LLC, 2020
Answer:
I don't know I just want my free answers
You go to the store to buy a new TV that is $430. If the tax is 6% of that price, what is the total cost of the TV including tax? PLEASE HELP ME
Answer:
455.8?
Step-by-step explanation:
$430 (tax: x,-,+) = 455.8.
tax: 25.8
Sorry if this is wrong.
Have a great day/night.
Please can someone help me and show the working out please
Check the picture below.
I need help 7 th grade math
Answer:
See each problem below.
Step-by-step explanation:
1. The 3 streets, North, Center, and South are parallel.
Avenue A is perpendicular to North Street.
That means the angles formed by North Street and Avenue A are right angles. Because of corresponding angles and parallel lines, the angles formed by Avenue A with Center Street and also the angles formed by Avenue A and South Street are also all right angles. That makes those corresponding angles congruent. That makes Avenue A and South Street perpendicular.
2. One angle is corresponding to the 70° angle and also measures 70°. The adjacent angle to the 70° angle is supplementary to it and measures 110°.
70°, 100°
3. Angles ACB and ACD form a linear pair and are supplementary. That means that the sum of their measures is 180°.
m<ACB + m<ACD = 180°
5x + m<ACD = 180
m<ACD = 180 - 5x
4. Angles BCF and CFE are same side interior angles of parallel lines cut by a transversal, so they are supplementary.
m<BCF + m<CFE = 180°
4x + 11x = 180
15x = 180
x = 12
m<BCF = 4x = 4(12) = 48
m<CFE = 11x = 11(12) = 132
m<BCF = 48°
m<CFE = 132°
5.
Angles CFG and DCF are same side interior angles of parallel lines cut by a transversal, so they are supplementary.
m<BCF + m<CFE = 180°
(3x) + (7x + 40) = 180
10x = 140
x = 14
m<CFG = 3x = 3(14) = 42
m<DCF = 7x + 40 = 7(14) + 40 = 138
m<CFG = 42°
m<DCF = 138°
6. See picture below.
7. <AGE, <BEG, <CHG, <DHF
8. If m<AGE = 85°, what is m<CHG?
Answer: Angles AGE and CHG are corresponding angles, so they are congruent.
m<CHG = 85°
Sally has a new beaded necklace. 30% of the 20 beads on Sally's
necklace are blue. How many blue beads are there on Sally's necklace?
Answer:
30% of 20 is 6 so 6/20 are blue
20 - 6 = 14
Therefore Sally has 14 blue beads in her necklace
Step-by-step explanation:
Can somebody answer this for me I’ll appreciate it so much
please help me ☹️ ..
Answer:
The answer should be A.) (0,2) and D.) (3,0)
Step-by-step explanation:
Hope i helped.
A brainliest is always appreciated.
The table shows how many miles Jack ran per week for weeks one through nine.Question:a. Use the table to plot the points.b. Describe the correlation, including whether it is strong or weak.c. Draw a line of best fit.d. Write the equation of a line of best fit in slope-intercept form.e. Using the line of best fit, estimate how may miles Jack ran the 10th week; show work.f. During which week would you expect Jack to run a full marathon, 26.3 miles? Do you think that you should round up or down to the nearest week? Why?
Answer:can you show a picture of it??
Step-by-step explanation:
In the table, Carmen recorded the lengths of embroidery thread (y) she needs to make bracelets of length (x).
Which equation best represents this relationship?
The equation that best represents this relationship is y = 8x
Equation of linear functionThe standard linear equation is expressed as y = mx + b
writing the given information in a coordinate form (x, y) will give (18, 144) and (22, 176)
Determine the slope "m"
Slope = 176-144/22-18
Slope = 32/4
Slope = 8
Detremine the y-intercept
144 = 8(18) + b
b = 144 - 144
b = 0
Hence the equation that best represents this relationship is y = 8x
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The equation of the line that passes through the points (-1. 8) and (3,0) can be written in the form y = mx + c. Find the value of m and the value of c.
Answer:
m = - 2 , c = 6
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Calculate m using the slope formula
m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
with (x₁, y₁ ) = (- 1, 8 ) and (x₂, y₂ ) = (3, 0 )
m = [tex]\frac{0-8}{3-(-1)}[/tex] = [tex]\frac{-8}{3+1}[/tex] = [tex]\frac{-8}{4}[/tex] = - 2 , then
y = - 2x + c ← is the partial equation
To find c substitute either of the 2 points into the partial equation
using (3, 0 )
0 = - 6 + c ⇒ c = 0 + 6 = 6
Que número sumado a -5.5 + ? = 0
Answer:
Perdon mi Espanol no es el mejor pero la respuesta es 5.5
Step-by-step explanation:
João claims he can read minds. His friend Pedro asked him to guess a number he was thinking of between 1 and 7 (inclusive). João guessed Pedro's number correctly 4 out of 9 times.
Let's test the hypothesis that João cannot read minds and therefore has a chance of
1/7 of guessing the correct number each time versus the alternative that his chance is somehow greater.
The table below sums up the results of 1000 simulations, each simulating 9 guesses with a chance of 1/7 start fraction, 1, divided by, 7, end fraction of being correct.
According to the simulations, what is the probability of having 4 or more correct guesses out of ?
Let's agree that if the observed outcome has a probability less than 1\%1%1, percent under the tested hypothesis, we will reject the hypothesis.
What should we conclude regarding the hypothesis?
Choose 1 answer:
Choose 1 answer:
(Choice A)
We cannot reject the hypothesis.
(Choice B)
We should reject the hypothesis.
correct guesses out of 9 Frequency
0 250
1 375
2 250
3 97
4 24
5 4
6 0
7 0
8 0
9 0
It can be deduced that the probability of having 4 or more correct guesses will be 0.0296.
How to calculate the probabilityFrom the given information, the null hypothesis is p = 1/7 and the alternate hypothesis is p>1/7. In this case, the mind reader gets a 4 out of 9 chances.
In order to test the hypothesis, simulations for 10000 cases were run with a probability of the correct answer being 1/7.
In this case, the p-value is the probability of correct answers that are greater than 4, assuming the null hypothesis is true. Here the p-value is 0.0296.
Also, the significance level to reject the hypothesis is less than 0.01. Since p > 0.01, we then fail to reject the hypothesis. Therefore the null hypothesis stands and Joao is not a mind reader.
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Yousef spins the following spinner 20 times, and it lands on 2 a total of 5 times. please help I will give brainliest
Answer:
40%
Step-by-step explanation:
sryy If I am wrong
Answer:
25 %
Step-by-step explanation
i just got it right on my test a few mins ago
Solve trigonometric function
sin∅ × csc∅ + cos(3π/2 - ∅) × sin∅
Answer:
[tex]\sf \cos ^2\left(x\right)[/tex]
Explanation:
[tex]\sf \sin \left(x\right)\csc \left(x\right)+\cos \left(\frac{3\pi }{2}-x\right)\sin \left(x\right)[/tex]
[tex]\sf \sin \left(x\right)\csc \left(x\right)+\left(-\sin \left(x\right)\right)\sin \left(x\right)[/tex]
[tex]\sf \sin \left(x\right)\csc \left(x\right)-\sin ^2\left(x\right)[/tex]
[tex]\sf \cos ^2\left(x\right)[/tex]
Answer:
[tex]\cos^2(\theta)[/tex]
Step-by-step explanation:
Identities used:
[tex]\csc(\theta)=\dfrac{1}{\sin(\theta)}[/tex]
[tex]\cos(\frac{3 \pi}{2}-\theta)=\cos(\frac{3 \pi}{2})\cos(\theta)+\sin(\frac{3 \pi}{2})\sin(\theta)[/tex]
[tex]\textsf{As }\cos(\frac{3 \pi}{2})=0\textsf{ and }\sin(\frac{3 \pi}{2})=-1[/tex]
[tex]\implies \cos(\frac{3 \pi}{2}-\theta)=0 \times\cos(\theta)+-1\times\sin(\theta)=-\sin(\theta)[/tex]
[tex]\sin^2(\theta)+\cos^2(\theta)=1 \implies \cos^2(\theta)=1-\sin^2(\theta)[/tex]
Therefore,
[tex]\sin(\theta) \times \csc(\theta)+\cos(\frac{3 \pi}{2}-\theta)\times\sin(\theta)[/tex]
[tex]=\sin(\theta) \times\dfrac{1}{\sin(\theta)}-\sin(\theta)\times\sin(\theta)[/tex]
[tex]=1-\sin^2(\theta)[/tex]
[tex]= \cos^2(\theta)[/tex]
A school survey found that 9 out of 10 students like pizza. If three students are chosen at random with replacment what is the probability that all three student like pizza?
Answer:
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events (9/10).
0.729
what is x' value when 5x=15?
Answer:
x = 3
Step-by-step explanation:
=> 5x=15
=> x = 15/5
=> x = 3
Answer:
x=3Step-by-step explanation:
Divide each term in 5x=15 by 5 and simplify.
∴ x=3
Thanks!
Answered by: FieryAnswererGT
#learnwithbrainly
The average breaking strength of a certain brand of steel cable is 2000 pounds, with a standard deviation of 100 pounds. A sample of 20 cables is selected and tested. Find the sample mean that will cut off the upper 95% of all samples of size 20 taken from the population. Assume the variable is normally distributed.
Answer:
1963.2 pounds (lbs.)
Step-by-step explanation:
Things to understand before solving:
- Normal Probability DistributionThe z-score formula can be used to solve normal distribution problems. In a set with mean ц and standard deviation б, the z-score of a measure X is given by: [tex]Z=\frac{X-u}{a}[/tex]The Z-score reflects how far the measure deviates from the mean. After determining the Z-score, we examine the z-score table to determine the p-value associated with this z-score. This p-value represents the likelihood that the measure's value is less than X, or the percentile of X. Subtracting 1 from the p-value yields the likelihood that the measure's value is larger than X.
- Central Limit TheoremThe Central Limit Theorem establishes that, for a normally distributed random variable X, with mean ц and standard deviation б , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean ц and standard deviation [tex]s=\frac{a}{\sqrt{n} }[/tex]As long as n is more than 30, the Central Limit Theorem may be applied to a skewed variable. A specific kind of steel cable has an average breaking strength of 2000 pounds, with a standard variation of 100 pounds.
This means, ц = 2000 and б = 100.
A random sample of 20 cables is chosen and tested.
This means that n = 20, [tex]s=\frac{100}{\sqrt{120} } =22.361[/tex]
Determine the sample mean that will exclude the top 95 percent of all size 20 samples drawn from the population.
This is the 100-95th percentile, or X when Z has a p-value of 0.05, or X when Z = -1.645. So [tex]Z=\frac{X-u}{a}[/tex]
By the Central Limit Theorem[tex]Z=\frac{X-u}{a} \\-1.645=\frac{X-2000}{22.361} \\X-2000=-1.645*22.361[/tex]
[tex]X =1963.2[/tex]
Answer:The sample mean that will cut off the top 95% of all size 20 samples obtained from the population is 1963.2 pounds.
How do I do this ?????
Answer:
14
Step-by-step explanation:
l-4l is 4 so 12/4=3 3x3=9 9+5 =14
Answer:
14
Step-by-step explanation:
Since absolute value is always positive, you will get 14. I will let you figure it out now. :D
The sum of ∠X and ∠Y is 90°. Which statement is TRUE?
∠X is acute and ∠Y is obtuse.
Both ∠X and ∠Y are right angles.
∠X is obtuse and ∠Y is acute.
Both ∠X and ∠Y are acute angle
Answer:
the answer is that both x and y are acute
Comstruct a parallelogram ABCD such that DC=6cm,angleADC=75 degree and the diagonal BD=9cm,construct the bisector of angle ADC and side AB,locate the point p where the two bisector meet,measure AP,DP,and angle APD.
Hi! :)
Please take a look at the diagram of the parallelogram attached.
This is your answer
Have a great day!
Exercise 2 Determine the measures of the angles marked with letters. (Note: Lines with arrowheads are parallel)
pls answer it correctly
Answer: n⁰ = 70⁰
Ok done. Thank to me :>
50 points and brainlest
Answer:
1) x = y + 4
2) x + 6 = y
3) x = 2y
Answer:
1. y = x - 4
2. y = x + 6
3. y = (1/2)x
4. c = 1.55n
5. e = 7.75h
25 hours
Step-by-step explanation:
1. y = x - 4
2. y = x + 6
3. slope m = change in y ÷ change in x
⇒ m = (7 - 6) ÷ (14 - 12) = 1/2
⇒ y - 6 = 1/2(x - 12)
⇒ y = (1/2)x
4. let c = cost
let n = number of songs
Ordered pairs: (1, 1.55) (2, 3.10) (5, 7.75)
⇒ c = 1.55n
5. let h = hours worked
let e = total earnings
earns $7.75 per hours
⇒ e = 7.75h
video game system = $193.75
⇒ 193.75 = 7.75h
⇒ h = 25
**options missing for questions 6 and 7**
Two lines in the same plane that do not intersect are A line segment B. perpendicular C parallel D. midpoint
Answer:
parallel
Step-by-step explanation:
What division problem has a 1-digit divisor and 2-digit dividend and the largest possible quotient
Answer:
99/1=99
Step-by-step explanation:
The largest possible quotient that has a 1-digit divisor and 2-digit dividend will be 99.
What is Algebra?Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.
The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.
Division means the separation of something into different parts, sharing of something among different people, places, etc.
The smallest one-digit number is 1 and the largest two digits number is 99. Then the largest possible quotient will be given as,
⇒ 99 / 1
⇒ 99
The largest possible quotient that has a 1-digit divisor and 2-digit dividend will be 99.
More about the Algebra link is given below.
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