Answer:
Area = Length x Width
Area = 6 feet x 4 feet
Area = 24 square feet
Which of the following describes the nature of the solutions of the quadratic
equation-2x^2-x-1=0?
A. One real, rational solution
B. Two real, rational solutions
C. Two real, irrational solutions
D. Two complex conjugate solutions
Answer:
D
Step-by-step explanation:
To find the solutions, let's calculate the determinant:
Δ = (-1)²-4(-2)(-1) = 1-8 = -7
the solution is: (1 ±√-7)/(-4)
√-7 indicates there are two complex solutions
shawna saved $75 from each paycheck for until she had saved $1,500. Shawna is paid twice a month. How many months did it take Shawna to save the $1,500? Write and solve an equation for this situation
Answer:
10
Step-by-step explanation:
The equation to find how much money she did get(m = months) would be m x 75 x 2 = 1500. Well, we don't know the m variable. Let's work backwards to find it. First we must divide 1500 by 2. This is 750. Know we must divide 750 by 75. This is 10. There you go! Your answer is 10.
find the cost of 10 pens at x pence each
Answer:
D. x + 10 pence
Step-by-step explanation:
Since the pen costs 10 pence more than the ruler, we need to add 10 to x.
if f(x)=(2x)^2, find f(-4)
Answer:
y=32
Step-by-step explanation:
substitute x for (-4)
(2 x -4)^2= 32
Keisha must choose a shirt and a pair of pants for today's outfit. She has 4 shirts and 2 pairs of pants to choose from. How many different outfits can she make?
answer: 12
explanation:
can someone please help thank you!
About 27% of students ride the bus for less than 13 minutes and about 82% of students ride the bus for less than 27 minutes.
What is ride of the bus?
To find the percentage of students who ride the bus for less than 13 minutes, we need to determine how many values in the data set are less than 13 and divide by the total number of values.
There are 3 values less than 13: 10, 11, and 13. So, 3 out of 11 values are less than 13.
Therefore, about 27% of students ride the bus for less than 13 minutes.
To find the percentage of students who ride the bus for less than 27 minutes, we need to determine how many values in the data set are less than 27 and divide by the total number of values.
There are 9 values less than 27: 10, 11, 13, 18, 19, 21, 22, 25, and 27. So, 9 out of 11 values are less than 27.
Therefore, about 82% of students ride the bus for less than 27 minutes.
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Complete question is: About 27% of students ride the bus for less than 13 minutes and about 82% of students ride the bus for less than 27 minutes.
If a soccer team made 37 penalty shots out of 100, what fraction and what percentage of penalty shots did the team miss? choose two answers.
A. 63/100
B. 0.37
C. 37/100
D.60/100
E. 63%
F. 37%
Answer:
A. 63/100
Step-by-step explanation:
100-37= 63.
How would i find percent of a number in this case 81% of 108 The work part i have the answer
Which one of the following would most likely have a negative linear correlation coefficient? A. the value of a car compared to its age B. the points scored by a basketball player compared to his minutes played C. the height of a woman compared to her age D. the hours of daylight in a city throughout The year
Answer:
B. the points scored by a basketball player compared to his minutes played
Step-by-step explanation:
the sum of three nonnegative numbers is 36, and one of the numbers is twice one of the other numbers. what is the maximum value of the product of these three num- bers?
324 is the maximum value of the product of these three numbers
What is maxima and minima?
The curve of a function has peaks and troughs called maxima and minima. A function may have any number of maxima and minima. Calculus allows us to determine any function's maximum and lowest values without ever consulting the function's graph. Maxima will be the curve's highest point within the specified range, and minima will be its lowest.
The extrema of a function are the maxima and minima. The maximum and minimum values of a function inside the specified ranges are known as maxima and minima, respectively. Absolute maxima and absolute minima are terms used to describe the function's maximum and minimum values, respectively, over its full range.
Let the three nonnegative numbers are x,y,z
According to the question
x+y+z=36
and y=2x
therefore, 3x+z=36--------------------------------------------------(1)
z=36-3x
Let 3xz= u--------------------------------------------------------------(2)
differentiating equation 2
du/dx=3z + 3xdz/dx
or
du/dx= z + xdz/dx
differentiating equation 1
3 + dz/dx = 0
dz/dx = -3
du/dz = 36-3x + x(-3)
du/dx = 12 - 2x--------------------------------------------------------------(3)
for maxima put du/dx = 0
x=6-------------------------------------------------------------------------------(4)
again differentiating du/dx = 12 - 2x
d2u/dx2=-2
which means 3xz= u is maximum at x=6
from equation 1 and 4
we get 18+z=36
z=18
Therefore 3xz= 3(6)(18)=324
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Help I’m willing to give points if needed or $
Answer:
it's the first one
hope it helps
kerry has a box of chocolates which are all flavoured with either mint or toffee. The possible outcomes of Kerry picking two chocolates at random are shown on the tree diagram below.
If both chocolates are the same flavour, what is the probability that they are both toffee?
Give your answer as a fraction in its simplest form
The statement predicts that 3/28 will be the answer.
How big is the probability universe?In regard to quantitative measurements ranging from zero to one, the probability theory offers a way to estimate the possibility of occurrence of various occurrences coming from a random experiment. A certain occurrence has a probability of one while an impossible event has a probability of zero.
Which four forms of probability are four?Probability is the study of random events in mathematics, and it can be classified into four main categories: logical, classic, empirical, and subjective.
According to what they meant:
the first chocolate toffee 3/8
Toffee chocolate number two: 2/7
So, 3/8 × 2/7 = 6/56 = 3/28
Thus, 3/28 is the correct response.
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Hi can anyone help ༼ つ ◕_◕ ༽つ
Answer:
B. 16/25
Step-by-step explanation:
6
10
+
4
100
=
6 × 10
10 × 10
+
4
100
=
60
100
+
4
100
=
60 + 4
100
=
64
100
=
64 ÷ 4
100 ÷ 4
=
16
25
Answer:
\(\huge\boxed{\sf \frac{16}{25} }\)
Step-by-step explanation:
Given fraction:\(\displaystyle \frac{6}{10} +\frac{4}{100}\)
To equalize the denominator, we will have to multiply the fraction 6/10 by 10.
\(\displaystyle =\frac{6 \times 10}{10 \times 10} +\frac{4}{100} \\\\\ =\frac{60}{100} +\frac{4}{100}\)
Now, that the denominator is equal, we can add both the fractions.
\(\displaystyle= \frac{60+4}{100} \\\\=\frac{64}{100}\)
Divide both numerator and denominator by 2.
\(\displaystyle = \frac{64 \div 2}{100 \div 2} \\\\= \frac{32}{50}\)
Divide again.
\(\displaystyle= \frac{32 \div 2}{50 \div 2} \\\\= \frac{16}{25} \\\\\rule[225]{225}{2}\)
factorize 3x(j-f) -4(f-j)
9514 1404 393
Answer:
(3x +4)(j -f)
Step-by-step explanation:
3x(j -f) -4(f -j) = 3x(j -f) +4(-f +j) . . . . distribute the minus sign in -4(f-j)
= 3x(j -f) +4(j -f)
= (3x +4)(j -f)
For questions 18-20, if l Il m, find the values of x and y.
Step-by-step explanation:
18x + 20y= 38
38xy = 38
xy = 38/38
where x and y = 1
What is the common ratio of the geometric
the answer is B. 7
Step-by-step explanation:
it's the number u see the most therefore its the most common
Answer:
D. 10 maybe?
Step-by-step explanation:
because it moves a decimal with every number. im not sure I hope it's correct. it adds on a zero
As a general rule in computing the standard error of the sample mean, the finite population correction factor is used only if the:
Group of answer choices
1. sample size is more than half of the population size.
2. sample size is smaller than 5% of the population size.
3. sample size is greater than 5% of the sample size.
4. None of these choices.
The finite population correction factor is used in computing the standard error of the sample mean when the sample size is smaller than 5% of the population size.
The finite population correction factor is a adjustment made to the standard error of the sample mean when the sample is taken from a finite population, rather than an infinite population.
It accounts for the fact that sampling without replacement affects the variability of the sample mean.
When the sample size is relatively large compared to the population size (more than half), the effect of sampling without replacement becomes negligible, and the finite population correction factor is not necessary.
In this case, the standard error of the sample mean can be estimated using the formula for sampling with replacement.
On the other hand, when the sample size is small relative to the population size (less than 5%), the effect of sampling without replacement becomes more pronounced, and the finite population correction factor should be applied.
This correction adjusts the standard error to account for the finite population size and provides a more accurate estimate of the variability of the sample mean.
Therefore, the correct answer is option 2: the finite population correction factor is used when the sample size is smaller than 5% of the population size.
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1
Which shows the equation in slope-intercept form of a line with a slope of 4 and a y-intercept of -5?
Answer:
y = 4x - 5
Step-by-step explanation:
Slope-intercept form: y = mx + b
m = slope
b = y-intercept
Since 4 is the slope and -5 is the y-intercept we will substitute it for m for the slope and -5 for the b.
y = 4x + (-5)
y = 4x - 5
Line t passes through points (1, 11) and (5, 2). Line u is parallel to line t. What is the slope of line u?
Answer:
slope = - \(\frac{9}{4}\)
Step-by-step explanation:
Calculate the slope of line t using the slope formula
m = \(\frac{y_{2}-y_{1} }{x_{2}-x_{1} }\)
with (x₁, y₁ ) = (1, 11 ) and (x₂, y₂ ) = (5, 2 )
m = \(\frac{2-11}{5-1}\) = \(\frac{-9}{4}\) = - \(\frac{9}{4}\)
Parallel lines have equal slopes , then
slope of line u is - \(\frac{9}{4}\)
Find the surface area of the cylinder and round to the nearest tenth. (It is recommended that you use the π button on your calculator) (Note: Remember the radius is half of the diameter.)
If you are using a screen-reader, please consult your instructor for assistance.
The surface area of the cylinder is 18.84 square feet
How to determine the surface area?The given parameters are
Height, h = 2 ft
Diameter, d = 2 ft
The radius (r) is half of the diameter (d)
This is calculated as:
Radius = Diameter/2
So, we have:
r = d/2
Substitute 2 for d
r = 2/2
Evaluate the quotient i.e. divide 2 by 1
r = 1
The surface area is then calculated using the following formula
A = 2πr² + 2πrh
Substitute the given values in the above equation
So, we have:
A = 2 * 3.14 * 1^2 + 2 * 3.14 * 1 * 2
Evaluate the exponents
A = 2 * 3.14 * 1 + 2 * 3.14 * 1 * 2
Evaluate the products
A = 6.28 + 12.56
Evaluate the sum
A = 18.84
Hence, the surface area of the cylinder with the given height and radius is 18.84 square feet
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Angel just accepted a job at a new company where he will make an annual salary of $58000. Angel was told that for each year he stays with the company, he will be given a salary raise of $1500. How much would Angel make as a salary after 10 years working for the company? What would be his salary after t years?
Salary after 10 years:
Salary after t years:
Answer:
1500 x 10 = 15,000
salary after 10 years is 58,000 + 15,000 = 73,000
Step-by-step explanation:
please help? i’ve tried many different answers and i don’t think any of the ones i tried were right.
Answer:
6x-5=59 answer
Step-by-step explanation:
6x=64
x=64/6
x=10.66
6x-5=59
6x=59+5
6x=64
x=64/6
x=10.67(rounded off)
A research technique in which data from a large number of studies are statistically combined is known as matrix analysis. factor analysis. meta-analysis. correlational analysis.
Meta-analysis is a research technique that involves systematically reviewing and statistically synthesizing data from multiple studies on a particular research question or topic.
The goal of meta-analysis is to provide a comprehensive summary of the existing evidence by combining the results of individual studies, which may have produced conflicting or inconclusive findings.
Meta-analysis typically involves a systematic search for relevant studies, followed by an evaluation of their quality and an extraction of relevant data. The data from the studies are then combined using statistical methods to produce an overall effect size estimate, such as a mean difference or odds ratio.
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Answer: 1.09 is closer to 1
How many terms of the series do we need to add in order to find the sum to the indicated accuracy?.
The number of terms required to achieve a desired accuracy in finding the sum of a series depends on the specific series and the level of accuracy desired. In general, as we add more terms to the series, the approximation of the sum improves, leading to a higher level of accuracy.
To understand how many terms are needed to find the sum with a given accuracy, let's consider an example. Suppose we have an infinite series represented as:
S = a + b + c + d + ...
where 'a', 'b', 'c', 'd', and so on are the terms of the series.
To find the sum of this series, we can take partial sums by adding a certain number of terms. For example, if we add only the first two terms, we get S2 = a + b. If we add the first three terms, we get S3 = a + b + c. The more terms we add, the closer the partial sum gets to the actual sum of the series.
The accuracy of our approximation is determined by the difference between the partial sum and the actual um. To specify the desired accuracy, we can define an error tolerance or a maximum allowable difference between the partial sum and the actual sum.
For instance, if we want our approximation to be accurate within a certain threshold, say ε, we need to find the smallest number of terms that make the difference between the partial sum and the actual sum less than ε.
The number of terms required to achieve the desired accuracy will depend on the convergence properties of the series. Some series converge rapidly, meaning that adding a few terms yields a very accurate approximation, while others converge slowly, requiring a larger number of terms for the same level of accuracy.
To determine the number of terms needed, we can use convergence tests specific to the series at hand. These tests include the Ratio Test, the Root Test, and the Comparison Test, among others. These tests help us determine whether a series converges or diverges and provide insights into its convergence rate.
In summary, the number of terms required to find the sum of a series with a given accuracy depends on the specific series and the desired level of accuracy. By using convergence tests and considering the error tolerance, we can estimate the number of terms needed to achieve the desired accuracy in approximating the sum of the series.
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find the value of n: 7n-12=16
Answer:
4.
Step-by-step explanation:
7n - 12 = 16
7n = 16 + 12 = 28
Since 7n = 28, n = 28 / 7 = 4.
A certain wire stretches 0.90 cm when outward forces with magnitude F are applied to each end. The same forces are applied to a wire of the same material but with three times the diameter and three times the length. The second wire stretches:
The length of the second wire stretches when the same forces are applied to it is given by option A. 0.30 cm .
Length of the wire = 0.90cm
let us consider the concept of Young's modulus also known as the modulus of elasticity.
Young's modulus is a measure of the stiffness or rigidity of a material.
It quantifies how much a material deforms under a given force.
The equation for Young's modulus is as follows,
E = (F/A) / (ΔL/L)
Where,
E is Young's modulus
F is the applied force
A is the cross-sectional area of the wire
ΔL is the change in length of the wire
L is the original length of the wire
The first wire stretches by 0.90 cm
and the forces applied to both wires are the same,
Use this information to determine the Young's modulus of the material.
Let us assign some variables,
ΔL₁= 0.90 cm change in length for the first wire
L₁ = original length of the first wire
A₁ = cross-sectional area of the first wire
Since the forces applied to both wires are the same,
Assume that the stress force per unit area is the same for both wires. This implies,
(F/A₁) / (ΔL₁/L₁) = (F/A₂) / (ΔL₂/L₂)
The second wire has three times the diameter and three times the length of the first wire.
This means the cross-sectional area A₂ of the second wire will be nine times the cross-sectional area A₁ of the first wire.
Mathematically,
A₂ = 9A₁
Similarly, the length L₂ of the second wire is three times the length L₁ of the first wire,
L₂ = 3L₁
Substituting these values into our equation, we have,
(F/A₁) / (ΔL₁/L₁) = (F/(9A₁)) / (ΔL₂/(3L₁))
Simplifying further, we get,
⇒ 1 / (ΔL₁/L₁) = 1/9 / (ΔL₂/(3L₁))
⇒ L₁ /ΔL₁= 1/9 × 3L₁/ΔL₂
⇒ 1/ ΔL₁ = ( 3/9) ( 1 / ΔL₂)
Since ΔL₁ =0.90 cm
Substitute these values and solve for ΔL₂,
⇒1/ 0.90 cm ₁ = ( 3/9) ( 1 / ΔL₂)
⇒ΔL₂ = (0.90 cm ) × (3/9)
⇒ΔL₂= 0.90 cm × (1/ 3)
⇒ΔL₂ = 0.30 cm
Therefore, the second wire stretches by option A. 0.30 cm when the same forces are applied to it.
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The above question is incomplete, the complete question is:
A certain wire stretches 0.90 cm when outward forces with magnitude F are applied to each end. The same forces are applied to a wire of the same material but with three times the diameter and three times the length. The second wire stretches:
A. .3 cm
B. .1 cm
C. 2.7 cm
D. .9 cm
walking the speed of 5km per hour, a boy hikes a distance of d km in t hours. Find the formula which describes d as a function of t.
Answer:
F(t) = 5t
Step-by-step explanation:
velocity = distance/time
distance = velocity × time
v - velocity
t - time
d - distance
v = 5
Distance as a function of time:
F(t) = 5×t
where F(t) represents distance
A boy hikes a distance of d km in t hours. The formula describes d as a function of t, F(t) = 5t.
What is the formula for velocity?velocity = distance/time
v - velocity
t - time
d - distance
v = 5
distance = velocity × time
Distance as a function of time
Therefore, F(t) = 5×t
Where F(t) represents the distance.
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how many different 4 card hands can be dealt from a deck of 52 cards? the order of the cards does not matter in this case.
Answer:
270,725 hands.
Step-by-step explanation:
(52 x 51 x 50 x 49)/(4 x 3 x 2) = 13 x 17 x 25 x 49 = 270,725
The following table lists the ages and number of players per group that are on a hockey team. Let A= (hockey players who are 12 years old) how many players are in the complement of A?
SOLUTION:
Step 1:
In this question, we are given the following:
The following table lists the ages and number of players per group that are on a hockey team.
Let A= (hockey players who are 12 years old)
How many players are in the complement of A?
Step 2:
We are meant to find the number of players that are in the complement of A:
Total number of players =
\(2+5+9+\text{ 3 = 19}\)Let A= (hockey players who are 12 years old) = 3
Number of players that are in complement of A =
\(\text{19 - 3 = 16}\)