Answer:
[tex]31 \times \frac{52}{24x6} [/tex]
A person, 35 meters away from a building, is looking up at a bird that is sitting on the top of the building. If the distance from that person to the bird is 91 meters, how tall is the building? (no website pls just answer)
Answer:
I think it is 56
Step-by-step explanation:
Sue Arva has 460 beads to make bracelets. Each bracelet will use 50 beads. How many bracelets will she be able to make? A. 9 B. 10 C. 16 D. 15
Answer:
A. 9
Step-by-step explanation:
So, she has 460 beads, and each braclet she makes requires 50 beads.
Therefore we will divide these numbers to get 9.2. This rounds to A. 9.\
Hope I help!
~PumpkinSpice1
Write the five-number summary of the following set of data: 5, 7, 8, 10, 10, 11, 13, 15, 16, 20?
Maximum
________________
Q1 (1st Quartile):???
Q2 (Median): ????
Q3 (3rd Quartile):????
What is the Maximum:???
Answer: Q1 10 Q216 Q3 8
Step-by-step explanation:
BECAUSE I THIK THAT IS THE ANSWER
What is the gradient of the line 3x + 2y=9
Answer:
slope : -3/2
Y=(0, 9/2)
Step-by-step explanation:
7 (n+4) = 21
Please help me solve this
Answer: n = -1
Step-by-step explanation: distribute 7 to n +4 to get 7n +28 = 21
subtract 28 on both sides, to get 7n= -7 divide by positive 7, and get n=-1
plug it in to check 7(-1+4)=21
-1+4= 3
7(3)= 21
it checks out ^_^
Prove Triangle congruence part 1
Answer:
there is five way to find that triangle is congruent. they are:
1. SAS axiom
2. SSS axiom
3. AAA axiom
4. ASA axiom
5. RHS axiom
An orange traffic cone has a diameter of 14 inches and a height of 28 inches. What is the volume of the traffic cone? Round to the nearest tenth.
Answer:
14367 inch^3
Step-by-step explanation:
Diameter of the cone= 14 inches
Radius of the cone= Diameter/2= 14/2= 7 inches
Height= 28 inches.
Volume of the cone = 1/3 π r^2 .h
Then substitute for the values, we have
Volume= 1/3 × π × 7^2 × 28
Volume= 1436.9 inch^3
Volume in nearest tenth= 14367 inch^3
Complete the table for the given rule.
Please help me and thank u, hope u all have a wonderful day!
Answer: 4= 2 8=3 12=4
Step-by-step explanation:
We see that 1/4 is the x, so we can multiply 4 by 1/4 which gives us 1 and then we add 1 because the equation has a +1. Now we do the same to the 8, 8(1/4 +1) =3.
Find the measure of <8
Hey guys, please help me answer this question!
Answer:
its 3rd one all the best for your test
Which of the following best describes the algebraic expression 7(x-9) +14 ?
Answer:
Fourteen more than seven times the quantity of a number minus nine.
Step-by-step explanation:
Faye has $3,000 that she is going to deposit into each of the two accounts as shown:
•Account A: 5% simple interest for 5 years
•Account B: will earn $828.84 over 5 years
Assuming Faye does not make any additional deposits nor withdrawals, find t combined amount of her two accounts after 5 years.
Answer:
Faye has $3,000 that she is going to deposit into each of the two accounts as shown:
•Account A: 5% simple interest for 5 years
•Account B: will earn $828.84 over 5 years
Assuming Faye does not make any additional deposits nor withdrawals, find t combined amount of her two accounts after 5 years.
Step-by-step explanation:
sub to sir sir bmgo ΔΔ
6.A random sample of 60 married couples who have been married 7 years was ask the number of children they have. You may assume requirements are satisfied.The results of the survey are as follow000333132231324033310233142313350230442232222343221432421232a.What is the shape of the distribution of the sample mean? Why?b.Compute a 95% confidence interval for the mean number of children of all couples who have been married for 7 years. Interpret the interval.c.Computer the 99% confidence interval for the mean number of childrenof all couples who have been married 7 years. Interpret the interval.
Answer:
(1.962 ; 2.578) ;
There is a 95% chance that the true population mean of the number of children of all couples who have been married for 7 years lies within the interval (1.962 ; 2.578);
(1.865 ; 2.675);
There is a 99% chance that the true population mean of the number of children of all couples who have been married for 7 years lies within the interval (1.8646 ; 2.6754)
Step-by-step explanation:
Given the data :
0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 5
Using calculator :
Mean, xbar = 2.27
Standard deviation, s = 1.219
Sample size = 60
Confidence interval :
Xbar ± Margin of error
Margin of Error = Zcritical * s/sqrt(n)
Zcritical at 95% = 1.96
Margin of Error = 1.96 * 1.219/ sqrt(60) = 0.3084
Lower boundary = (2.27 - 0.3084) = 1.962
Upper boundary = (2 27 + 0.3084) = 2.578
(1.962 ; 2.578)
There is a 95% chance that the true population mean of the number of children of all couples who have been married for 7 years lies within the interval (1.962 ; 2.578)
C.) 99% confidence interval :
Xbar ± Margin of error
Margin of Error = Zcritical * s/sqrt(n)
Zcritical at 99% = 2.576
Margin of Error = 2.576 * 1.219/ sqrt(60) = 0.4054
Lower boundary = (2.27 - 0.4054) = 1.8646
Upper boundary = (2.27 + 0.4054) = 2.6754
(1.865 ; 2.675)
There is a 99% chance that the true population mean of the number of children of all couples who have been married for 7 years lies within the interval (1.8646 ; 2.6754)
If the length of each side of a triangle is doubled then its perimeter is _________________
Answer:
If the length of each side of a triangle is doubled then its perimeter is also doubled.
A university researcher wants to estimate the mean number of novels that seniors read during their time in college. An exit survey was conducted with a random sample of 9 seniors. The sample mean was 7 novels with standard deviation 2.29 novels. Assuming that all conditions for conducting inference have been met, what is a 95 percent confidence interval for the population mean number of novels read by all seniors?
Answer:
(5.240 ; 8.760)
Step-by-step explanation:
Given :
Sample mean, xbar = 7
Standard deviation, s = 2.29
Sample size, n = 9
95% confidence interval for the population mean :
Confidence interval :
Xbar ± Margin of error
Margin of Error = Tcritical * s/sqrt(n)
Tcritical at 0.05 ; df = 8 = 2.306
Margin of Error = 2.306 * 2.29/sqrt(9)
Margin of Error = 1.760
Lower boundary = (7 - 1.760) = 5.240
Upper boundary = (7 + 1.760) = 8.760
(5.240 ; 8.760)
2x^2 + 16x + 28 = 0?
Answer:
[tex]x=-4+\sqrt{2}[/tex]
[tex]x=-4-\sqrt{2}[/tex]
Step-by-step explanation:
The quadratic formula is an equation that can be used to find the roots of a quadratic equation when one is given the equation in standard form. A quadratic equation in standard form is the following,
[tex]ax^2 +bx + c=0[/tex]
The quadratic formula is the following,
[tex]\frac{(-a)(+-)\sqrt{(x)^2-4(b)(c)}}{2(a)}[/tex]
Substitute in the given coefficients for the following equation,
[tex]2x^2 + 16x + 28 = 0[/tex]
Substitute,
[tex]\frac{-16(+-)\sqrt{(16)^2-4(2)(8)}}{2(2)}[/tex]
Simplify,
[tex]\frac{-16(+-)\sqrt{256-224}}{4}\\\\=\frac{-16(+-)\sqrt{32}}{4}\\\\=\frac{-16(+-)4\sqrt{2}}{4}\\\\=-4(+-)\sqrt{2}[/tex]
The roots of the quadratic equation ([tex]2x^2+16x+28=0[/tex]) are ([tex]x=-4+\sqrt2[/tex]) and ([tex]x=-4-\sqrt{2}[/tex])
In the problem 10-4=6 what’s the correct term for the number 4?
A. Product
B. Difference
C. Minuend
D. Subtrahend
Answer:
D. subtrahend
a quantity or number to be subtracted from another. so, 4 is the number which is to be subtracted from 10.
hope this answer helps you!
please mark this answer as the brainliest.. thank you!
Can somebody please help me?
2+2
Answer:
4 is the answer =)
What is the best way to learn percentage?
Answer: To write a percentage as a decimal, simply divide it by 100. For example, 50% becomes 0.5, 20% becomes 0.2, 1% becomes 0.01 and so on. We can calculate percentages using this knowledge. 50% is the same as a half, so 50% of 10 is 5, because five is half of 10 (10 ÷ 2).
Step-by-step explanation:
Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.
Find the remainder of (x^4 - 2) divided by (x + 1).
Answer:
-1 is the remainder
hope it helps
Answer:
-1 is the remainder for this problem.
Step-by-step explanation:
Plato.
Two hundred and fifty-four people were surveyed regarding their favorite type of gemstone: 54% chose diamonds 6% chose sapphires 30% chose emeralds .. 10% rubies.Approximately, how many people did not choose emeralds or rubies?
Step-by-step explanation:
anyone GIRLS interested in talk...cuz I m getting bored
A set of data was published in the fall 2019 Phi Kappa Phi Forum regarding the performance of Major League Baseball (MLB) umpires in calling balls and strikes. The article is based on data collected by MLB over eleven seasons (2008-2018). This study shows that it is common for umpires to make incorrect calls more than 20% of the time. An average game has about 300 pitches where the umpire has to make a decision. Assume that we take a random sample of 300 of the 4 million ball/strike calls in the database. From this sample of 300, there were 70 incorrect calls made for a sample proportion of.23. The question is does this one sample of size 300 with 70 incorrect calls provide sufficient evidence to allow us to conclude that the umpires are making bad calls at a rate greater than 20%?
Calculate the value of the Z test statistic using phat - 23 from the above description.
Answer:
The answer is "1.30".
Step-by-step explanation:
Proportion of population[tex]=0.20[/tex]
Ratio sample[tex]=\frac{70}{300}=\frac{7}{30}=0.23[/tex]
Statistics of the test:
[tex]\to Z=\frac{(0.23-0.2)}{\sqrt{(\frac{0.2\times(1-0.2)}{300})}}\\\\[/tex]
[tex]=1.30[/tex]
What is the equation of the line that is parallel to line y = -3x – 8 and passes
through the point (-2, 9)?
y= 1x + 29
y = -3x + 11
y = -3x + 3
y = 4x + 53
Answer:
y = -3x + 3
Step-by-step explanation:
Since the line is parallel, it has the same slope. Plug the point you have into the equation y - y1 = slope (x -x1) to get your answer, which should be y = -3x +3
Hopefully this helps - let me know if you have any questions!
Answer:
C: y = -3x +3
Step-by-step explanation:
Lines that are parallel have the same slope have so the slope of the line in -3, now we have to find the y-intercept, we can do this by substituting -2 for x and 9 for y and solve for b
9 = -3(-2) +b
9 = 6 + b
b = 3
So the line that is parallel to y = -3x -8 and goers through the point (-2,9) is y = -3x + 3 or answer C
3 (18 - 7) divided by 2? I have to show my work
Answer:
16.5
Step-by-step explanation:
(18-7) = 11
11 x 3 = 33
33 divided by 2 = 16.5
Answer:
[tex]16\frac{1}{2}[/tex]
Step-by-step explanation:
[tex]\frac{3 (18 - 7)}{2} =\frac{3*11}{2}=\frac{33}{2}= 16\frac{1}{2}[/tex]
I PROMISE I'LL GIVE BRAINIEST
1+2x<9
Answer:
x<4
Step-by-step explanation:
1+2x<9
2x<8
x<4
What is the measure of Arc BA? An explanation would be much appreciated.
Answer:
m<BA = 180degrees
Step-by-step explanation:
First you must know that measure of <BA is 180 degrees and m<CD = m<BA
Since <CD = 16z - 12, hence;
180 = 16z - 12
16z = 180++12
16z = 192
z = 192/16
z = 12
Get <BA
m<BA = 16z - 12
m<BA = 16(12) - 12
m<BA = 192 - 12
m<BA = 180degrees
102 is what percent more than 50
What function is the inverse of the exponential function y = 3^x?
Which equation could represent the following:
5 less than a number is 8.
On - 5 = 8
0 5 - n = 8
On + 5 = 8
0 5 + n = 3
Answer:
n - 5 = 8
Step-by-step explanation:
5 less than a number = a number subtracted by 5
A university is applying classification methods in order to identify alumni who may be interested in donating money. The university has a database of 58,205 alumni profiles containing numerous variables. Of these 58,205 alumni, only 576 have donated in the past. The university has oversampled the data and trained a random forest of 100 classification trees. For a cutoff value of 0.5, the following confusion matrix summarizes the performance of the random forest on a validation set:
Predicted
Actual No Donation Donation
Donation 268 20
No Donation 5375 23439
The following table lists some information on individual observations from the validation set:
0.8
Observation ID Actual Class Probability of Donation Predicted Class
A Donation 0.8 No Donation
B No Donation 0.1 Donation
C No Donation 0.6 Donation
Compute the values of accuracy, sensitivity, specificity, and precision.
Answer:
Accuracy = 0.81
Sensitivity = 0.93
Specificity = 0.81
Precision = 0.047
Step-by-step explanation:
Given the confusion matrix :
Actual_______ Donation___ No Donation
Donation______ 268 (TP) _______ 20 (FN)
No Donation ___5375 (FP) _____23439 (TN)
Accuracy is calculated as :
(TP + TN) / (TP+TN+FP+FN)
(268 + 23439) / (268 + 23439 + 5375 + 20)
ACCURACY = (23707 / 29102) = 0.81
Sensitivity (True positive rate) :
TP ÷ (TP + FN)
268 ÷ (268 + 20)
268 ÷ 288 = 0.93
Specificity (True Negative rate) :
TN ÷ (TN + FP)
23439 ÷ (23439 + 5375)
23439 ÷ 28814
= 0.81
Precision :
TP ÷ (TP + FP)
268 ÷ (268 + 5375)
268 ÷ 5643
= 0.047