Select the correct answer.
The vertex of a parabola is at the origin, and its focus is at . Which function does the graph with these attributes represent?
A.
B.
C.
D.
Answers
Related Questions
Which of the following statements is true?
OA
5
10
14
2
15
25
18
20
B.
20
16
25
100
12
12
12
5
OC
1 1
1
2
6 5
4
3
OD
50
10
100
1
10
5
20
6
Answers
There are 14 chairs in each
of 6 rows. There are 18 chairs in each of
4 rows. How many rows of 13 chairs can
be made from all of the chairs?
Answers
Answer:
37 rows I think has for all
What is 1/2x1/2 in fractions?
Answers
The requried multiplication of 1/2 and 1/2 is equal to 1/4. This means that if you divide a whole into 4 equal parts and then take one of those parts.
To multiply fractions, you simply multiply the numerators together and the denominators together.
The multiplication of 1/2 and 1/2 is calculated as follows:
(1/2) * (1/2) = (1 * 1) / (2 * 2)
= 1 / 4
Therefore, the multiplication of 1/2 and 1/2 is equal to 1/4. This means that if you divide a whole into 4 equal parts and then take one of those parts, it's equivalent to multiplying 1/2 by 1/2.
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Referring to the figure, the two rectangles shown have
equal areas. Find the value of x.
Answers
Answer:
x = 2
Step-by-step explanation:
the area (A) of a rectangle is calculated as
A = length × breadth
given the rectangles have equal areas then equating the two areas gives
4x × 9 = 4(6x + 6) , that is
36x = 24x + 24 ( subtract 24x from both sides )
12x = 24 ( divide both sides by 12 )
x = 2
3. The t test for two independent samples - Two-tailed example
“Bullying,” according to noted expert Dan Olweus, “poisons the educational environment and affects the learning of every child.” Bullying and victimization are evident as early as preschool, with the problem peaking in middle school. Suppose you are interested in the emotional well-being of not only the victims but also bystanders, bullies, and those who bully but who are also victims (bully-victims). You decide to measure depression in a group of victims and a group of bully-victims using a 26-item, 3-point depression scale. Assume scores on the depression scale are normally distributed and that the variances of the depression scores are the same among victims and bully-victims.
The group of 30 victims scored an average of 21.5 with a sample standard deviation of 10 on the depression scale. The group of 27 bully-victims scored an average of 25.8 with a sample standard deviation of 9 on the same scale. You do not have any presupposed assumptions about whether victims or bully-victims will be more depressed, so you formulate the null and alternative hypotheses as:
H0
: μvictims
– μbully-victims
= 0
H1
: μvictims
– μbully-victims
≠ 0
You conduct an independent-measures t test. Given your null and alternative hypotheses, this is a test. To use the Distributions tool to find the rejection region, you first need to set the degrees of freedom. The degrees of freedom is .
The critical t-scores that form the boundaries of the rejection region for α = 0.01 are ± .
In order to calculate the t statistic, you first need to calculate the standard error under the assumption that the null hypothesis is true. In order to calculate the standard error, you first need to calculate the pooled variance. The pooled variance is s2p
= . The standard error is s(M1 – M2)
= .
The t statistic is .
The t statistic in the rejection region. Therefore, the null hypothesis is . You conclude that victims have a different mean depression score than bully-victims. Thus, it can be said that these two means are different from one another.
Answers
The test statistics do not lie in the rejection so the null hypothesis does not reject.
How to solveHere we have the following information:
\(\bar{x}_{1}=25.3, n_{1}=25, s_{1}=9, \bar{x}_{2}=20.5, n_{2}=23, s_{2}=8\)
Here degree of feedom will be
\(df=n_{1}+n_{2}-2=25+23-2=46\)
The critical values of t are: +/- 2.687
Rejection region:
If t < -2.687 and t > 2.687, reject H0
Pooled variance is :
\(s^{2}_{p}=\frac{(n_{1}-1)s_{1}^{2}+\left ( n_{2}-1 \right )s_{2}^{2}}{n_{1}+n_{2}-2}=72.8696\)
The standard error is
\(s_{M_{1}-M_{2}}=s_{p}\sqrt{\frac{1}{n_{1}}+\frac{1}{n_{2}}}=2.4664\)
and t-statistics will be
\(t=\frac{\bar{x}_{1}-\bar{x}_{2}}{s_{p}\sqrt{\frac{1}{n_{1}}+\frac{1}{n_{2}}}}=1.946\)
The test statistics do not lie in the rejection so the null hypothesis does not reject.
You cannot conclude...
not
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Which of the following have both 2 and −5 as solutions?
Answers
Answer:
Picture pls
Step-by-step explanation:
Answer:
Need more
Step-by-step explanation:
The NY Rangers have won 55.1% of their games so far this season. Suppose they play seven games against the NY Islanders this season. What is the probability that the Rangers end up winning the majority of their games against the Islanders this season (assuming win percentage stays the same)?
Answers
Answer:
The probability that the Rangers end up winning the majority of their games against the Islanders this season is about 68.9%.
Step-by-step explanation:
GO SEATTLE KRAKEN AND LA KINGS BY DA WAY
You want to fit a linear regression model to a large dataset and need to determine the number of predictors to use. Below is a plot of four statistics from this model valued for various number of predictors:
Determine which of the following best describes each line. No explanation needed.
(A) W is test MSE, X is variance, Y is squared bias, Z is training MSE
(B) W is variance, X is squared bias, Y is test MSE, Z is training MSE
(C) W is training MSE, X is test MSE, Y is variance, Z is squared bias
(D) W is test MSE, X is training MSE, Y is variance, Z is squared bias
(E) W is variance, X is training MSE, Y is test MSE, Z is squared bias
Answers
(A) W is test MSE, X is variance, Y is squared bias, Z is training MSE is the best description of each line in linear regression model
From the given plot, we can see that:
The blue line (W) is decreasing with increasing number of predictors, which indicates that it represents variance.
The green line (X) is increasing with increasing number of predictors, which indicates that it represents training MSE.
The red line (Y) is decreasing with increasing number of predictors, which indicates that it represents test MSE.
The purple line (Z) is roughly constant and does not show any clear trend with increasing number of predictors, which indicates that it represents squared bias.
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A square originally starts with an area of 64 cm2.
If each side of the square is increased by 2 cm, what is the area of the new square?
Answers
Answer:
100 cm2
Step-by-step explanation:
If the area is 64 cm2 that means that the side is 8 cm (square root of 64 is 8)
8 increased by 2 = 10
area 10x10 = 100 cm2
Answer:
the answer is 100cm²
since originally is 64 cm²
so square root of 64 is 8 cm.
after you get 8cm you get,
8+2 = 10cm (a side of square)
and then to find a new area you get,
10 × 10 = 100 cm²
Which of the numbers listed below are solutions to the equation below?
Check all that apply.
√5 =s
S
O A. -5
O B. 3
O C. -1
O D. 5
O E 3
Answers
Answer:
3
Step-by-step explanation:
I think because
\( \sqrt{5 } = 2.236\)
so by round off it should be 2 or 3
what is 7 divided by 8 if the answer was a fraction
Answers
Answer:
7/8
That's the fraction.
A club is holding a raffle. Ten thousand
tickets have been sold for $2 each. There
will be a 1st prize of $3000, 3 second prizes
of $1000 each, 5 third prizes of $500 each
and 20 consolation prizes of $100 each.
Find the expected winnings of a single ticket.
Answers
Answer: Other answer is incorrect. It’s asking for the expected winnings of a single ticket. The answer is -.95
Step-by-step explanation:
1/10,000
3/10,000
5/10,000
20/10,000
9971/10,000
-
2998
998
498
98
-2
-
2998+2994+2490+1960-1992 =
-9500/10000 = -.95
what is length?define
Answers
Step-by-step explanation:
the measurement or extent of something from end to end; the greater of two or the greatest of three dimensions of an object.
Answer:
the measurement or extent of something from end to end.
Can I have some help asap?
Answers
Answer:
I will help you okay????
x^{2} =(2x-1)^{2} please hep me
Answers
Answer:
\( {x}^{2} = {(2x - 1)}^{2} \\ {x}^{2} = 4 {x}^{2} - 4x + 1 \\ 3 {x}^{2} - 4x + 1 = 0 \\ (x - 1)(x - \frac{1}{3} ) = 0 \\ \therefore \: x = 1 \: or \: x = \frac{1}{3} \)
Determine the minimum sample size required when you want to be99 % confident that the sample mean is within one unit of the population mean and o=14.8 . Assume the population is normally distributed.
A confidence level 99%
requires a sample size of
Answers
Which statement is true?
Answers
Answer:
your right
Step-by-step explanation:
The infant mortality rate is defined as the number of infant deaths per 1,000 live births. This rate is often used as an indicator of the level of health in a country. The relative frequency histogram below shows the distribution of estimated infant death rates in 2012 for 222 countries.58 Estimate Ql, the median, and Q3 from the histogram. Would you expect the mean of this data set to be smaller or larger than the median? Explain your reasoning.
Answers
As per the histogram the mean of data set to be larger than the median
The infant mortality rate is an important measure of the health of a country, as it reflects the number of deaths of infants under the age of one year per 1,000 live births.
The histogram below shows the distribution of estimated infant death rates for 222 countries in 2012.
The median of a data set is the value that separates the lower half of the data from the upper half. It can be estimated from the histogram by finding the middle value of the data set, or the point at which half of the data points fall below it and half fall above it.
In the histogram, the median is estimated to be around 25, as there are roughly equal numbers of countries with infant mortality rates below and above this value.
The first quartile (Q1) is the value that separates the lowest 25% of the data from the rest of the data, while the third quartile (Q3) separates the top 25% of the data from the rest. In the histogram, Q1 is estimated to be around 10 and Q3 is estimated to be around 40.
It is common for the mean of a data set to be larger or smaller than the median, depending on the distribution of the data. In the case of the infant mortality rate histogram, it is possible that the mean may be larger than the median, as the data is likely to be skewed towards higher values due to outliers.
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help me pleasee!!
thank you <3
Answers
the interval notation is [-7,8] but i have no idea what roster notation is
Negative 3 (8 minus 5) squared minus (negative 7) = negative 3 (3) squared minus (negative 7) = negative 3 (9) minus (negative 7) = 27 minus (negative 7) = 34.
What was Huda’s error?
Huda evaluated (3) squared incorrectly.
Huda found the product of –3 and 9 as positive.
Huda subtracted –7 from 27 incorrectly.
Huda did not follow the order of operations.
Answers
Huda's error in evaluating (3) squared incorrectly led to the incorrect final result.
The correct answer should be -20, not 34.
Huda's error was that she evaluated (3) squared incorrectly.
Instead of calculating 3 squared as 9, she mistakenly considered it as 3. This error led to incorrect subsequent calculations and the final result of 34, which is not the correct answer.
To evaluate the expression correctly, let's go through the steps:
Negative 3 (8 minus 5) squared minus (negative 7) \(= -3(3)^2 - (-7)\)
First, we simplify the expression within the parentheses:
\(-3(3)^2 - (-7) = -3(9) - (-7)\)
Next, we evaluate the exponent:
-3(9) - (-7) = -3(9) + 7
Now, we perform the multiplication and addition/subtraction:
-3(9) + 7 = -27 + 7 = -20
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FREE BRAINLIEST!!! + 100 PTS
Compare negative one and six tenths repeating and negative five thirds using symbols <, >, or =. negative one and six tenths repeating is less than negative five thirds negative one and six tenths repeating is greater than negative five thirds negative five thirds is equal to negative one and six tenths repeating negative five thirds is greater than negative one and six tenths repeating
Answers
Answer:
-1 6/10
is greater than
- 5/3
Step-by-step explanation:
Select the true statement.
Answers
1 1/2 yards = 54 inches.
Answer: D) 54 inches = 1 1/2 yards
explanation: 1 1/2 yards = 54 inches.
I am doing calculus and I am supposed to use the tips it gives us and write it step by step and get explain each step. I can not use L hospitals rule, but I don’t know where to start
Answers
The value is 1
From the question, we have
lim_(K→0) ((sin(AK))^2)/((sin(BK))^2 )
Differentiate the above form, we get
=lim_(K→0) ((2cos(AK)))/((2cos(BK)) ) (Applying l hospital rule)
Now substitute the limit,
=2/2 = 1
L’Hospital’s Rule :
An input value that a function approaches and yields some result is referred to as a limit. Calculus and mathematical analysis depend on limits, which are also used to determine integrals, derivatives, and continuity. A general technique for assessing indeterminate forms like 0/0 or / is the L'Hospital rule. L'Hospital's rule is applied to calculate the limits of indeterminate forms for calculus derivatives. It is possible to use the L Hospital rule many times. This rule is still valid after being applied, and it will take any indefinite form. L'Hospital's Rule cannot be applied if the issue is not of the indeterminate types.
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Can someone help me?
Answers
Answer:
with what
Step-by-step explanation:
dont see nothinfg
Answer:BD equals CE? Are lines parallel
Step-by-step explanation:
A landlord is considering upgrades and repairs, including wood floors, kitchen tile, a new back door, and a repaired garage door. The landlord could do these things himself or hire a contractor. The contractor could finish the job in half the time but would charge more. The landlord wants to leave the choice of whether to actually upgrade the kitchen tile up to the optimization algorithm. How should this constraint be written if he uses the following scheme for decision variables? x1 = contractor works on wood floors x2 = landlord works on wood floors x3 = contractor works on kitchen tile x4 = landlord works on kitchen tile x5 = contractor works on back door x6 = landlord works on back door x7 = contractor works on garage door x8 = landlord works on garage door Group of answer choices x3+ x4≤ 1 x3+ x4= 1 x3- x4= 1 x3- x4≤ 1
Answers
Answer:
x3 + x4 ≤ 1
Step-by-step explanation:
Upgrades considered = wood floors, Kitchen tile, New back door and a repaired garage
The constraint of whether to upgrade the kitchen either by the landlord or by a contractor can be represented with the scheme below:
x3 + x4 ≤ 1
The constraint is written this way because only one scheme can be used at a time i.e when x3 = 1 , x4 = 0 and vice versa. also
note that both x3 and x4 can be = 0. because the upgrade of the kitchen tiles is under probability and the landlord might decide not to upgrade the kitchen tiles hence both schemes ( x3 and x4 ) can be = 0
find the equation of the line perpendicular to AB and passing midpoint of AB
Answers
Answer:
The equation of the line perpendicular to and passing through its midpoint is equals negative a quarter plus three-quarters.
2/5 x 7
Can someone explain how I solve this problem and if you do so I’ll mark you as brainliest!
Answers
Answer:
2/5 x 7" is 70.
Step-by-step explanation:
To solve this problem, you need to perform the operation of multiplication. In this case, the problem can be solved by multiplying 2 by 5, and then multiplying the result by 7.
The order of operations, also known as the hierarchy of operations, tells us the order in which we should perform calculations in a math problem. The order of operations is important because it ensures that calculations are done in the correct sequence and that the final result is accurate.
In this problem, the multiplication operation should be done before the division operation, because multiplication and division have the same precedence and should be done from left to right.
So, to solve the problem, you would first multiply 2 by 5 to get 10, and then multiply 10 by 7 to get the final result of 70.
Therefore, the answer to the problem "2/5 x 7" is 70.
Answer: =2.8
Step-by-step explanation:
2/5 x 7
=0.4 * 7
=2.8
Multiple-choice questions
Tick the correct answer to each of the questions below.
1 When selling a product to your client it is important to:
a make sure it is the most expensive
b give good advice on how to use it
c make sure the sale is quick
d put it in an attractive bag
2 Always having retail products in stock is one way of:
a spending a lot of money on stock
b making more money
c leaving the salon vulnerable to theft
d keeping clients happy
3 Communication occurs between people through:
a body language and speech
b talking to the client in consultation
c verbal, non-verbal and written forms
d verbal and written forms
Answers
Answer:
1. B
2.D
3.D
Don't hold me to my answers, they are just the best answers and i have experience with these things. I hope this helps
Answer:
1=b
2=b
3=c
Step-by-step explanation:
I HOPE THIS HELPED
IF WRONG IM SORRY HAVE A WONDERFUL WEEK:)
Draw the straight line y = x + 2
Answers
Answer:
Graph is attached below
Step-by-step explanation:
You first need to plot any two points on the coordinate plane(you can also do more than two points to make it more accurate). Then, using a ruler connect the points and extend the line outwards.
The plotted straight line is as shown in below graph.
Given straight line equation is y = x + 2
To plot a straight line, take two different values of x which output different values of y. Then plot those points in the graph.
After plotting those two points, you connect both dots with straight line and extend that line infinitely from both endpoints.
Example, take x = 1 and x = 2 for straight line y = x + 2
Then we get:
For x = 1, y = 1 + 2 = 3
For x = 2, y = 2 + 2 = 4
The plot of points (1,3) and (2,4) and the straight line y = x + 2 is shown below.
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A toy car costs $60. It is reduced to 10% in a sale. How much does it cost in a sale ?
Answers
Answer:
$54
Step-by-step explanation:
10% of $60 is $6
$60-$6=$54