Hii can someone who is really good at math please help me with these 2 math questions. I'm struggling with them!!
Y=x-8
Y=x^2x-3 it’s graphs
Answer:
no point of intersection
Step-by-step explanation:
y=x-8
y=x^2-2x-3
A model car is constructed with a scale of 1:15. If the actual car is 12 feet long, which proportion represents the length x of the model car?
The length of the model car based on the information is 0.8 feet.
What is scale?It should be noted that scale simply shows the relationship between a measurement on a model as well as the corresponding measurement on the actual object.
From the information, the model car is constructed with a scale of 1:15.
When the actual car is 12 feet long, the length of the model will be illustrated as x. This will be:
= 1/15 = x / 12
Cross multiply
15x = 1 × 12
15x = 12
Divide
x = 12 / 15
x = 0.8
The length is 0.8 feet.
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Is London on GMT time now?
London is currently on British Summer Time (BST), which is 1 hour ahead of Greenwich Mean Time (GMT).
The time in London is determined by the British Summer Time (BST) which is 1 hour ahead of Greenwich Mean Time (GMT) during the summer months when Daylight Saving Time is in effect.
BST starts at 1:00 am GMT on the last Sunday of March and ends at 1:00 am GMT on the last Sunday of October. At other times of the year, London is on Greenwich Mean Time (GMT).
However, it's important to note that the United Kingdom has announced it will not be returning to GMT from BST from 2021, therefore London will remain on British Summer Time year-round.
During the months when BST is in effect, London is 4 hours and 30 minutes ahead of Indian Standard Time (IST).
It's also important to note that the time in London may change depending on the political decisions and if there are any changes in the time zone, it's always better to check the current time on reliable sources such as official websites or local news.
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The diagram shows a circle inside a square.
16 cm
Work out the area of the circle.
Answer:
200.96cm^2
Step-by-step explanation:
the circle's diameter is 16cm --> the radius is 8cm
the area of the circle is 8^2 x 3.14 = 200.96 cm^2
translate and solve: 6 fewer than s is no less than −78. (write your solution in interval notation.)
When 6 fewer than s is no less than −78, the solution in interval notation is (84,∞)
Interval notation is a way of writing subsets of the real number line
Given,
6 fewer than s is no less than -78
6-s < -78
Move 6 to right hand side
-s < -78-6
-s < -84
s > 84
Then the interval notation is (84,∞)
Hence, when 6 fewer than s is no less than −78, the solution in interval notation is (84,∞)
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a listing of all possible outcomes of an experiment and their corresponding probabilities of occurrence is called a .
A probability distribution is a list of all potential outcomes from an experiment along with the probability assigned to each occurrence.
The term "probability distribution" refers to a mathematical function or table that expresses the possibilities of occurring for various potential outcomes in a certain experiment.
The chance of a variety of outcomes occurring within a given range is provided by the probability distribution. It displays the total of all potential values, which are dispersed in a range from 0 to 1, and which should add up to 1.
The probability distribution is related to the following information:
The table or equation that links each and every result of the statistical experiment with the likelihood that it will occur.It also contains a list of all potential outcomes from an experiment.Learn more about probability here https://brainly.com/question/9905918
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what is the term for the value that occurs most often in a series of numbers?
The term for the value that occurs most often in a series of numbers is called the mode.
The mode is one of the three main measures of central tendency, along with the mean and the median. It is a useful descriptive statistic that can provide insights into the characteristics of a dataset.
To find the mode of a set of data, you first need to arrange the data in order, either in increasing or decreasing order. Then, you simply identify the most frequent data point, which is the mode. In some cases, there may be more than one mode if multiple data points occur with the same maximum frequency.
The mode is particularly useful when dealing with categorical or nominal data, where there are distinct categories or values that cannot be ordered in a meaningful way. For example, the mode can help identify the most popular color among a group of people or the most common type of car on a given street. It can also be used for continuous data, although it may be less useful in this case than the mean or median.
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You buy a "gold" ring at a pawn shop. The ring has a mass of 0.014 g and a volume of 0.0022 cm^3. The standard density of gold is 19,300 kg/m^3. Is the ring solid gold?
Answer:
Below
Step-by-step explanation:
.014 g / .0022 cm^3 = 6.364 gm / cc = 6364 kg/m^3
density is too low to be pure gold
I Need help Really bad
Answer:
7776π in³
Step-by-step explanation:
You are given the area of the sphere, so you can use the area formula to find its radius. Then the volume formula can be used to find the volume.
__
radiusThe area of the sphere is given by the formula ...
A = 4πr²
Solving for r, we find ...
A/(4π) = r²
√(A/(4π)) = r = √(1296π/(4π)) = √324 = 18
The radius of the sphere is 18 inches.
__
volumeThe volume formula is ...
V = 4/3πr³
Using the found radius, we find the volume to be ...
V = 4/3π(18 in)³ = 4/3(5832)π in³
V = 7776π in³
Elliott has some yarn that she wants to use to make hats and scarves. Each hat uses 0.2 kilograms of yarn and each scarf uses 0.1 kilograms of yarn. Elliott wants to use twice as much yarn for scarves as for hats, and she wants to make a total of 20 items. Let h be the number of hats Elliott makes and s be the number of scarves she makes. Which system of equations represents this situation? Choose 1 answer:
Answer:
The yarn used by h number of hats and The yarn used by s number of scarf. hence, the system of equations which represents the situation are:
(1) h+8=20
(2) 4xh=1
Step-by-step explanation:
What Is the average rate of change f(x) = x ^ 2 - x + 4; x= 2 to x = 4
Answer:
B
Step-by-step explanation:
14 points :) please explain thank you so much!
The domain of the function is -2 ≤ x < -5 and the range is -2 < y < 1
What is the domain of a function?The domain of the function is the set of input values of the graph
What is the range of a function?The range of a function is the set of output values of the graph.
How to determine the domain and the range?The graph represents the given parameters
On the graph, we have the following endpoints
Closed circle at (-2, -1)
Open circle at (-5, -2)
Maximum = (0, 1)
The domain
The definition of the domain implies that the domain of a function is the set of x values of the graph.
Recall that
Closed circle at (-2, -1)
Open circle at (-5, -2)
Maximum = (0, 1)
Remove the maximum
Closed circle at (-2, -1)
Open circle at (-5, -2)
Remove the y coordinates
So, we have
Closed circle at (-2)
Open circle at (-5)
Combine the x values
-2 ≤ x < -5
The range
The definition of the range implies that the range of a function is the set of y values of the graph.
Recall that
Closed circle at (-2, -1)
Open circle at (-5, -2)
Maximum = (0, 1)
Remove the smaller larger y value of the endpoints)
Open circle at (-5, -2)
Maximum = (0, 1)
Remove the x coordinates
So, we have
Open circle at (-2)
Maximum = (1)
Combine the y values
-2 < y < 1
Hence, the domain of the function is -2 ≤ x < -5 and the range is -2 < y < 1
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The average American man consumes 9.7 grams of sodium each day. Suppose that the sodium consumption of American men is normally distributed with a standard deviation of 1 grams. Suppose an American man is
randomly chosen. Le X = the amount of sodium consumed. Round all numeric answers to 4 decimal places where possible.
b. Find the probability that this American man consumes between 10.5 and 11.2 grams of sodium per day? ____
c. The middle 20% of American men consume between what two weights of sodium?
Low:
High:
Answer:
Step-by-step explanation:
b. p(10.5<x<11.2)= p(x<11.2)-p(x<10.5)
p(x<11.2)= (11.2-9.7)/1 = 1.5 = 0.9332
p(x<10.5)= (10.5-9.7)/1= .8= 0.7881
.9332-0.7881= .1451
c. 9.7-.253, 9.7+.253
9.447, 9.953
Write the sample space for rolling a 6 sided die.
Answer:
Sample space = { 1, 2, 3, 4, 5, 6}
Explanation:
The sample space is the set with all the possible outcomes of the experiment. So if we roll a 6 sided die, we have the possible outcomes:
{ 1, 2, 3, 4, 5, 6}
Because we have 6 possible results. one for every side of the die
Therefore, the sample space is { 1, 2, 3, 4, 5, 6}
Pleaseee helpppTyler left his house and drove to the store. He stopped and went inside. From there, he drove in the same direction until he got to the bank. He stopped and went inside the bank. Then he drove home. The graph below shows the number of blocks away from home Tyler is x minutes after he left his house, until he got back home.
Answer:
4 minutes
Hope this helps!!! :)
A ______________ consists of a limited number of people from the overall population, selected in such a way that each has an equal chance of being chosen.
A random sample is a representative subset of individuals selected from the larger population in such a way that each member of the population has an equal chance of being chosen.
The purpose of a random sample is to obtain a sample that is unbiased and reflects the characteristics of the entire population.
By giving every individual an equal opportunity to be included in the sample, random sampling helps minimize selection bias and ensures that the sample is more likely to be representative of the population as a whole. This allows researchers to make valid inferences and generalizations about the population based on the characteristics observed in the random sample.
Random sampling is widely used in various fields, including research, surveys, and statistical analysis, to draw reliable conclusions about a larger population based on a smaller subset of individuals.
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what is the
spuare root of 144
Answer:
The square root of 144 will be 12
Answer:
12 is the answer
Step-by-step explanation:
12x12=144
Solve dy/dx = xy, y(0) = 2. Find the interval, on which the solution is defined.
Answer:
The interval on which the solution is defined depends on the domain of the exponential function. Since e^((1/2)x^2 + ln(2)) is defined for all real numbers, the solution is defined on the interval (-∞, +∞), meaning the solution is valid for all x values.
Step-by-step explanation:
o solve the differential equation dy/dx = xy with the initial condition y(0) = 2, we can separate the variables and integrate both sides.
Starting with the given differential equation:
dy/dx = xy
We can rearrange the equation to isolate the variables:
dy/y = x dx
Now, let's integrate both sides with respect to their respective variables:
∫(dy/y) = ∫x dx
Integrating the left side gives us:
ln|y| = (1/2)x^2 + C1
Where C1 is the constant of integration.
Now, we can exponentiate both sides to eliminate the natural logarithm:
|y| = e^((1/2)x^2 + C1)
Since y can take positive or negative values, we can remove the absolute value sign:
y = ± e^((1/2)x^2 + C1)
Next, we consider the initial condition y(0) = 2. Substituting x = 0 and y = 2 into the solution equation, we get:
2 = ± e^(C1)
Here, we see that e^(C1) is positive since it represents the exponential of a real number. So, the ± sign can be removed, and we have:
2 = e^(C1)
Taking the natural logarithm of both sides:
ln(2) = C1
Now, we can rewrite the general solution with the determined constant:
y = ± e^((1/2)x^2 + ln(2))
evaluate 2ps for p=3 and s=5
A)30
B)23
C)6
D)10
Answer: the real answer for this will be p=3/2 and s=5
Step-by-step explanation: here
2p=3
2p/2=3b/2 divide both sides by 2
P=3/2
3/2 for p in s=5
S=5
S=5
Answer P=3/2 and s= 5
Got it
Hey there!
“Evaluate 2ps for p=3 and s=5”
• Side note: If p = 3 then SUBSTITUTE where “p” is at in the equation; if s = 5 then SUBSTITUTE where “s” is at in the equation!
• New equation: 2(3)(5)
2(3)(5)
2(3) = 6
6(5) = 30
Answer: A. 30 ☑️
Good luck on your assignment and enjoy your day!
~LoveYourselfFirst:)
Form and solve an equation to find x
Perimeter = 42 cm
2x
- 3
Х
Х
2x – 3
-
When you are trying to discover whether there is a relationship between two categorical variables, why is it useful to transform the counts in a crosstabs to percentages of row or column totals
When analyzing categorical data, it is often useful to examine the relationship between two variables. Crosstabs, or contingency tables, are commonly used to display the counts of observations in each combination of the two variables. However, these raw counts can be difficult to interpret, especially if the totals for each variable are different.
By transforming the counts into percentages of row or column totals, we can better understand the patterns and relationships in the data. Percentages allow us to compare the proportions of one variable within each category of the other variable, regardless of the total number of observations. This can help us identify any trends or patterns in the data that may not be immediately apparent from the raw counts.
For example, suppose we have a crosstab of gender and favorite color. The raw counts may show that more females than males prefer blue, but it's difficult to know if this difference is meaningful without knowing the total number of males and females in the sample. By transforming the counts to percentages of row totals, we can see that 40% of females prefer blue, while only 30% of males do. This suggests that there may be a relationship between gender and favorite color.
Overall, transforming raw counts into percentages of row or column totals can help us better understand the relationship between two categorical variables, especially when the totals are different.
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Choose the best answer.
Which shape has the greater area?
Answer:
the first answer is no
the second one is square
sorry if it is wrong
some of the students enrolled at college t are part-time students and the rest are full-time students. by what percent did the number of full-time students enrolled at college t increase from the fall of 1999 to the fall of 2000 ?
In the fall of 1999, there were 200 full-time students enrolled at College T. In the fall of 2000, this number increased to 260, which represents an increase of 30%.
To calculate the percent increase, we first find the difference in the number of full-time students: 260 - 200 = 60. Then, we divide this difference by the original number of full-time students and multiply by 100 to express the answer as a percentage: (60 / 200) * 100 = 30%. This shows that there was a 30% increase in the number of full-time students at College T from the fall of 1999 to the fall of 2000.
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In a certain shipment of 17 printers, 10 are defective. 12 of the printers are selected at random without replacement. What is the probability that 7 of the 12 printers are defective? Express your answer as a fraction or a decimal number rounded to four decimal places.
The probability that exactly 7 out of 12 randomly selected printers from a shipment of 17, where 10 are defective, will be defective is approximately 0.1947, rounded to four decimal places.
To calculate the probability, we can use the hypergeometric distribution since we are sampling without replacement. The hypergeometric distribution describes the probability of selecting a certain number of successes (defective printers) from a finite population (total printers) without replacement.
In this case, we have 10 defective printers and 7 non-defective printers in the population of 17 printers. We want to find the probability of selecting exactly 7 defective printers and 5 non-defective printers out of the 12 printers selected.
Using the hypergeometric distribution formula, the probability can be calculated as:
P(X = 7) = (C(10, 7) * C(7, 5)) / C(17, 12)
where C(n, r) represents the binomial coefficient, which calculates the number of ways to choose r objects from a set of n objects.
Evaluating this expression, we find:
P(X = 7) = (C(10, 7) * C(7, 5)) / C(17, 12) ≈ 0.1947
Therefore, the probability that exactly 7 out of 12 randomly selected printers are defective is approximately 0.1947, rounded to four decimal places.
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The prime factorizations of 16 and 24 are shown below.
Prime factorization of 16: 2, 2, 2, 2
Prime factorization of 24: 2, 2, 2,3
Using the prime factorizations, what is the greatest common factor of 16 and 24?
O 2
O 2'2
© 2'2'2
O 2 2 2 2'3
The greatest common factor of 16 and 24 is 2×2×2
What is the greatest common factor?The greatest common factor (GCF) of a set of numbers is the largest factor that all the numbers share.
Given that, The prime factorizations of 16 and 24 are shown below.
Prime factorization of 16: 2, 2, 2, 2
Prime factorization of 24: 2, 2, 2, 3
Now, choosing the common factors = 2, 2, 2
Therefore, the GCF = 2, 2, 2
Hence, The GCF of 16 and 24 is 2, 2, 2
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What was the total amount of the checks listed on the opposite of the deposit slip
From the deposit slip
The amount on each check is
Check #162 = $123.51
Check #234 = $211.00
Check #521 = $214.14
The summation of the amount on each check is\
\(\text{\$}123.51+\text{\$}211.00+\text{\$}214.14=\text{\$}548.65\)T
Answer: $521.24
Step-by-step explanation:
On Tuesday, Ashley walked the first dog for 27 minutes, the second dog for 35 minutes, and the third dog for 15 minutes. If she started walking the first dog at 8:00 am, what time did she finish walking all the dogs?
Answer:
9:17
Step-by-step explanation:
Answer: 9:17 am
Step-by-step explanation: I added all the minutes together and got 77 minutes. Then I simplified the 77 minutes into an hour and 17 minutes. Then I added the 1hour and 17minutes to 8:00 am.
suppose that you have a collection of n spins, each of which points up or down with equal probability. what is the probability that exactly n of them will point up? give both an exact expression and an approximation valid for large n. are there any additional conditions on n for your large n approximations to be valid?
The probability that exactly n of the collection of n spins will point up is given by the Binomial distribution. The Binomial distribution is a discrete probability distribution that models the number of successes (x) in a given number of trials (n) with a fixed probability of success (p) on each trial.
In this case, we have n trials, with a fixed probability of success of 0.5 (since each spin can point up or down with equal probability). The number of successes we're interested in is n. Thus, the probability of n successes is given by:P(X = n) = (nCn)(0.5)^n = 0.5^nwhere nCn is the number of ways to choose n items from n items, which is 1.Approximation for large n:When n is large, we can use the normal approximation to the Binomial distribution.
Specifically, we use the Normal distribution with mean np and variance np(1-p). In this case, p = 0.5, so the mean and variance are both (0.5)n. Therefore, the probability of n successes is approximately:P(X = n) ≈ φ(x) = (1/σ√2π)exp[-(x-μ)^2/2σ^2]where μ = np = (0.5)n and σ^2 = np(1-p) = (0.5)n(0.5) = (0.25)n.
Plugging these values in, we get:P(X = n) ≈ φ(x) = (1/σ√2π)exp[-(n/2n)^2/2(0.25)n] = (1/σ√2π)exp[-(1/8n)] = (1/√2πn)exp[-(1/8n)]Note that for the large n approximation to be valid, we require np and n(1-p) to be at least 10. In this case, np = (0.5)n and n(1-p) = (0.5)n, so this condition is satisfied for any n.
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A florist is making bouquets for a wedding. She starts with 85 flowers. She makes 7 bouquets. She has 15 flowers left over. What equation can be used to solve the number of flowers, x the florist uses in each bouquet?
Answer:
x = (85 - 15)/7
Step-by-step explanation:
x = (85 - 15)/7
x = 10