Answer:
-3
Step-by-step explanation:
Based on his weekly salary and commission, we can calculate that Mr. Randall sold goods worth $1,800.
In the formula given, sales is represented as s. To find the total sales, you can solve the equation:
300 + 0.07s = 426
0.07s = 426 - 300
s = 126 / 0.07
= $1,800
In conclusion, Mr. Randall sold $1,800 worth of goods.
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What does ∆ mean in calculus?
In lambda expressions and lambda (λ) phrases, the Greek letter lambda () is used to signify binding a variable in a function. You can have typed or untyped lambda calculus.
Functions can only be used in typed lambda calculus if they are able to accept the "type" of data that the input is. The Greek symbol lambda () is commonly used to represent wavelength, which is equal to the speed (v) of a wave train in a medium divided by its frequency (f): wavelength = v/f. The majority of the time, students struggle to understand calculus because they don't practice after class, can't concentrate in class, have gaps in their math knowledge, and believe it's a waste of time.
The actions you can do to make calculus simple are listed below. Calculus is the most difficult math topic, and very few students, whether in high school or elsewhere, succeed in it. In vector space, linear algebra is a subset of abstract algebra. Matrix technology makes things less abstract and easier to understand because it is more concrete. The mean number of events within a particular period of time or space is denoted by the Greek letter lambda () in the Poisson distribution formula. For instance, = 0.748 floods annually.
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Correct Question:
What does λ mean in calculus?
how to do i do this please help:)
Answer:
i cant read that,
Step-by-step explanation:
A gardener wants to divide a square piece of lawn in half diagonally. What is the length of the diagonal if the side of the square is ? Leave your answer in simplest radical form.a. 16√8b. 2√8c. 8√2d. 4
On solving the provided question, we can say that from equation \(diagonal ^2 = 8^2 + 8^2\), the answer is \(DIAGONAL = 8\sqrt(2) \\\)
What is equation?A mathematical equation is a formula that joins two statements and uses the equal symbol (=) to indicate equality. A mathematical statement that establishes the equality of two mathematical expressions is known as an equation in algebra. For instance, in the equation 3x + 5 = 14, the equal sign places the variables 3x + 5 and 14 apart. The relationship between the two sentences on either side of a letter is described by a mathematical formula. Often, there is only one variable, which also serves as the symbol. for instance, 2x – 4 = 2.
\(diagonal ^2 = 8^2 + 8^2\\diagonal ^2 = 64 + 64\\diagonal ^2 = 128\\diagonal ^2 = 64 * 2\\\)
\(diagonal ^2 = 8 * sq root (2)\\Diagonal of a square = SqrRoot (2 * side^2)\\Diagonal = \sqrt{2 * 8^2} \\Diagonal = \sqrt(128)\\\)
\(\sqrt(128) = \sqrt(2 * 64) = \sqrt(2) * 8\\DIAGONAL = 8\sqrt(2) \\\)
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The lyric, "Historians research more than just the word of one/To learn all sides of history" most closely means that
Which?
Answer:
I would say C
Step-by-step explanation:
I said C because when people look for information they look at different sources instead of just one.
State Rolle’s theorem. Using Rolle’s theorem, find a point on the curve
f(x) = cos2x where the tangent is parallel to x-axis on [−π, π].
Rolle's theorem:
If a function \(f\) is continuous on the closed interval \( [a, b] \) and differentiable on the open interval \((a,b)\) such that \(f(a) = f(b)\), then [tex)f′(x) = 0\) for some \(x\) with \( a \leq x \leq b\).
Tangent:
A tangent is parallel to the x-axis if the slope of the tangent is 0. So, using Rolle's theorem, if we consider \(x=-\pi/2\) and \(x=\pi/2\), then \(f(-\pi/2)=f(\pi/2)=-1\).
Since \(f(x)\) is continuous on \([-\pi/2, \pi/2]\) and differentiable on \((-\pi/2, \pi/2)\), \(f'(x)=0\) for some \(-\pi/2 \leq x \leq \pi/2\), and thus there is a point in this interval which is parallel to the x-axis.
Ken charges his neighbors $17.00 to wash their car. How many cars must he wash next summer if his goal is to earn at least$1800?
Let x be the minimum number of cars Ken has to wash to reach his goal, then we can set the following linear equation:
\(17x=1800.\)Solving the above equation for x, we get:
\(x=\frac{1800}{17}.\)Rounding up to the nearest whole number we get:
\(x\approx106.\)Answer: \(106.\)The results of a paired-difference test are shown below to the right. d = 5.6
a. Construct and interpret a 99% confidence interval estimate for the paired difference Sd =0.25 in mean values.
b. Construct and interpret a 90% confidence interval estimate for the paired difference n=16 in mean values_ (Round to two decimal places as needed:) Choose the correct answer below:
OA This interval will contain the true population mean 90% of the time_
OB. There is a 90% chance that the true population mean is contained in the interval.
Oc: If many random samples of this size were taken and intervals constructed, 90% of them would contain the true population mean: 0
D. Approximately 90% of the differences will be contained in the interval.
If many random samples of this size were taken and intervals constructed, 90% of them would contain the true population mean. In repeated sampling, about 90% of the constructed confidence intervals will capture the true population mean difference. The correct answer is C.
When we construct a confidence interval, it is important to understand its interpretation. In this case, the correct answer (Oc) states that if we were to take many random samples of the same size and construct confidence intervals for each sample, approximately 90% of these intervals would contain the true population mean difference.
This interpretation is based on the concept of sampling variability. Due to random sampling, different samples from the same population will yield slightly different sample means.
The confidence interval accounts for this variability by providing a range of values within which we can reasonably expect the true population mean difference to fall a certain percentage of the time.
In the given scenario, when constructing a 90% confidence interval for the paired difference, it means that 90% of the intervals we construct from repeated samples will successfully capture the true population mean difference, while 10% of the intervals may not contain the true value.
It's important to note that this interpretation does not imply a probability or chance for an individual interval to capture the true population mean. Once the interval is constructed, it either does or does not contain the true value. The confidence level refers to the long-term behavior of the intervals when repeated sampling is considered.
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Solve the equation for x.
2 x/3 = 100.6
A) x ≈ 2.22
B) x ≈ 19.96
C) x ≈ 0.41
D) x ≈ 6.65
Answer:
150.9
Step-by-step explanation:
2/3x=100.6
x=100.6/(2/3)
x=100.6(3/2)
x=150.9
Answer:
It is answer B
Step-by-step explanation:
A rectangular block has square base of area 64 cm². If the thickness of the block is 5 cm, find its total surface area.
Answer:
total surface area of cube is 6 * area of one side
therefore area of one side is given 64cm^2
thickness is also given 5cm .
TSA is 64*5 = 320cm^2
hope it is helpful
Answer:
288 cm²
Step-by-step explanation:
The square base has an area of 64 cm².
That means the sides of the square base measure 8 cm.
The perimeter of the base is P = 4 * 8 cm = 32 cm.
The lateral area is Ph = 32 cm * 5 cm = 160 cm².
The two bases are congruent, and their combined area is 2 * 64 cm² = 128 cm².
The total surface area equals the sum of the lateral area and the area of the bases.
SA = 160 cm² + 128 cm²
SA = 288 cm²
pls help if you can asap!!!!
Answer: A
Step-by-step explanation: I would say A because the angle is greater than 90 degrees
Answer:
We have supplementary angles.
76 + 3x + 2 = 180
3x + 78 = 180
3x = 102
x = 34
3/5 of a number is 162. Work out the number. How do I do this AQA question?
Answer:
The number is 270
Step-by-step explanation:
Let the number be 'x'
3/5 of x = 162
\(\frac{3}{5}*x = 162\\\\x=162*\frac{5}{3}\\\\x=54 * 5\\\\x = 270\)
Answer:
\( \boxed{ \bold{ \huge{ \boxed{ \sf{270}}}}}\)
Step-by-step explanation:
Let the number be 'x'
\( \sf{ \frac{3}{5 } \: \: of \: x \: = 162}\)
⇒\( \sf{ \frac{3x}{5} = 162}\)
Apply cross product property
⇒\( \sf{3x = 162 \times 5}\)
Multiply the numbers
⇒\( \sf{3x = 810}\)
Divide both sides of the equation by 3
⇒\( \sf{ \frac{3x}{3} = \frac{810}{3} }\)
Calculate
⇒\( \sf{x = 270}\)
Hope I helped!
Best regards!!
calculate the slope of the line shown on the graph using any two of the labeled points. Show your work on paper or in the box below.
15x+3y=27 into slope-intercept form, simplifying all fractions.
Answer:
y = -5x + 9
Step-by-step explanation:
Slope-intercept form is the form
y = mx + b
So you need to rearrange the terms to get the y all by itself on the left. On the right, the x term goes first and last the constant (a plain number) see image.
Hello, a Maths question if anyone knows what to do Solve: 6(x+4)=30
Answer:
x = 1
Step-by-step explanation:
6(x+4)=30 (divide both sides by 6)
(x+4) = 30/6
x+4 = 5 (subtract 4 from both sides)
x = 5 - 4
x = 1
Step-by-step explanation: 6(x+4)=30
(Distributive property): 6x+24=30
( Transposition method): 6x=30-24( + becomes -) 6x=6
(Transpose 6 to rhs) x=6/6( since it was multiplication on LHS it becomes division in RHS) x=1
The height of a triangle is 5 m longer than the base. If the area is 150 m2 , how long is the base?.
The base of the triangle is 15 meters.
Here, we are given that the height of a triangle is 5 m longer than the base.
Let the height of the triangle be h
Then, the base of the triangle will be = h - 5
Further, we are given that area of the triangle = 150 meter square
We know that area of a triangle = 1/2 × base × height
⇒ 150 = 1/2 × h × (h-5)
150 × 2 = h(h-5)
300 = \(h^{2}\) - 5h
\(h^{2}\) - 5h - 300 = 0
Now, we solve the above quadratic equation by splitting the middle term.
\(h^{2}\) + 15h - 20h - 300 = 0
h( h + 15) - 20( h + 15) = 0
(h - 20) (h + 15) = 0
Thus, h = 20 or -15
But since height cannot be negative, h = 20
⇒ base = h - 5
= 20 - 5
= 15 meters
Thus, the base of the triangle is 15 meters.
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WILL MARK BRANIEST FOR GOOD ANSWER AND FOR ANSWERING IT RIGHT
THE QUESTION IS ATTACHED BELOW
Answer:
The answer is C beacause it is 20 times greater than the other numbers
a vertical circular cylinder has radius r ft and height h ft. if the height and radius both increase at the constant rate of 2 ft/sec, then the rate, in square feet per second, at which the lateral surface area increases is
The rate at which the lateral surface area increases is 5πh square feet per second.
The lateral surface area of a vertical circular cylinder is given by the formula:
\(Lateral surface area = 2πrh\)
Taking the derivative with respect to time, we get:
dL/dt = 2π(dr/dt)h + 2πr(dh/dt)
Given that the height and radius both increase at the constant rate of 2 ft/sec, we can substitute:
dr/dt = dh/dt = 2 ft/sec
So, the expression becomes:
dL/dt = 2π(2)(h + r)
Since r = h/2, we can substitute:
dL/dt = 2π(2)(h + h/2) = 5πh
Therefore, the rate at which the lateral surface area increases is 5πh square feet per second.
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(t/f) in a binomial experiment, there are only two possible outcomes for each of the n trials. true false
In a binomial experiment, there are only two possible outcomes for each of the n trials. True statement.
These outcomes are typically labeled as "success" and "failure," and they are mutually exclusive (meaning that only one outcome can occur per trial) and collectively exhaustive (meaning that one of the two outcomes must occur per trial).
The probability of success on each trial is denoted by the letter p, and the probability of failure (which is simply 1-p) is denoted by the letter q. The number of trials in a binomial experiment is denoted by the letter n, and the total number of successes is denoted by the letter x. The binomial distribution is used to calculate the probability of getting a certain number of successes (x) in n trials, given a known probability of success (p) on each trial. The formula for the binomial distribution is P(X=x) = (n choose x) * p^x * q^(n-x), where "n choose x" is the number of ways to choose x successes out of n trials, and the exponentiation represents the probability of getting x successes and (n-x) failures in a specific order.Know more about the binomial experiment
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which of the following is not a type of angle
a acute
b obtuse
c parallel
d right
Answer:
parallel
Step-by-step explanation:
parallel describes lines
the answer is C
Step-by-step explanation:
parallel is not a type of angle
yo please help i have no idea how to do this(the first 2 questions the tecaher did)
Answer:
Step-by-step explanation:
You'll need to learn the formula for the circumference of a circle. If the radius is r, the circumference C is C = 2πr. It appears that your teacher is using pi for the exact circumference and 3.14 for the approximate circumference.
The radius of the first circle is 5 in. Thus, the exact circumference is
C = 2πr = 2π(5 in) = 10π in, and the approximate circumference is
C = 2(3.14)(5 in) = 31.4 in
some one help me please
Answer:
first one is 18 second one is 45
Step-by-step explanation:
add 18 and 45 to get 63
area is 63
SOMEONE HELP ME PLEASE
Decide if the following scenario involves a permutation or combination. Then find the number of possibilities.
You are setting the combination on a five-digit lock. You want to use the numbers 12345 but you don't care what order they are in.
Answer:
basically this is just 5! (five factorial) which is 120
the formal formula would be
n!/(n-r)! = 5!/(5-5)! = 5!/0! = 5! = 120
Step-by-step explanation:
The number of the ways that can be used to set the digital lock will be 120.
What are permutation and combination?A permutation is an act of arranging items or elements in the correct order. Combinations are a way of selecting items or pieces from a group of objects or sets when the order of the components is immaterial.
Decide if the following scenario involves a permutation or combination. Then the number of possibilities will be
You are setting the combination on a five-digit lock.
You want to use the numbers 12345, but you don't care what order they are in.
Then the number of the ways that can be used to set the digital lock will be
⇒ 5!
⇒ 5 x 4 x 3 x 2 x 1
⇒ 120
The number of the ways that can be used to set the digital lock will be 120.
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random selection of 300 participants yields a sample. demographic analysis of that sample reveals that there are 99 teachers in the sample, despite the fact that the target population contains far fewer than 33% teachers. which term describes the sample?
The term that describes the sample in this scenario is "biased."A sample is considered biased when it is not representative of the target population.
In this case, the fact that 33% of the sample consists of teachers despite the fact that the target population contains far fewer than 33% teachers indicates that the sample is not representative of the target population.
There are many reasons why a sample might be biased. For example, if the method of selecting participants is flawed or if the sample size is too small, it can result in a biased sample. In this case, it's possible that the method used to select participants led to an overrepresentation of teachers in the sample. Therefore, the sample is biased, and any conclusions drawn from it may not be generalizable to the target population.
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Please help I need to finish this in 2 days
The angle subtended at the center of the arc is 102⁰
What is the length of the arc?Recall that to find the length of an arc on a circle, we can use the formula L = r *, where r is the radius of the circle, is the central angle, and is the angle between the ends of the arc. If the central angle is measured in degrees, we can use the formula L = r *, where r is the radius of the circle, is the central angle, and is the angle between the ends of the arc.
Lenght of arc = A/360 *2пr
A = angle at center = ?
п = 22/7 r = radius = 840 feet
⇒1500 = A/360 2 *22/7 * 840
1500 = 36960A/2520
3780000= 36960A
making A the subject we have
3780000/36960 = A
A = 102.27
A= 102⁰
The angle is 102⁰
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What are the roots of the quadratic equation 0 = 2x² + 12x-14?
1,6, -7
2,12,-14
-7,1
-1,7
The roots of the quadratic equation 0 = 2x² + 12x-14 is (C) x=-7 and x=1.
What is a quadratic equation?Any equation in algebra that can be written in the standard form where x stands for an unknown value and a, b, and c stand for known values is said to be a quadratic equation.
In general, it is assumed that a > 0; equations with a = 0 are regarded as degenerate since they become linear or even simpler.
So, the roots of 0 = 2x² + 12x-14 are:
2x² + 12x-14 = 0
2x² + 14x - 2x -14
2x(x + 7) - 2(x + 7)
(2x - 2) (x + 7)
Now, use the zero product property as follows:
2x - 2 = 0
2x = 2
x = 2/2
x = 1
And
x + 7 = 0
x = -7
Therefore, the roots of the quadratic equation 0 = 2x² + 12x-14 is (C) x = -7 and x = 1.
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Correct question:
What are the roots of the quadratic equation 0 = 2x² + 12x-14?
a. 1,6, -7
b. 2,12,-14
c. -7,1
d. -1,7
A nursery owner buys 7 panes of glass to fix some damage to greenhouse. The 7 panes cost $20.65. Unfortunately, breaks 3 more panes while repairing the damage. What is the cost of another panes of glass?
2. Suppose that you have three identical black pens and four identical blue pens on your desk. How many different ways are there to order them in a row
There are 35 different ways to order the three identical black pens and four identical blue pens in a row.
To find the number of different ways to order the three identical black pens and four identical blue pens in a row, we can use the concept of permutations.
In this case, since the black pens are identical and the blue pens are identical, we only need to consider the arrangement of the two groups: the black pens and the blue pens.
The total number of arrangements can be calculated using the formula for permutations of objects with repetition. The formula is:
P(n; n1, n2, ..., nk) = n! / (n1! * n2! * ... * nk!)
where:
a) n is the total number of objects (in this case, the total number of pens)
b) n1, n2, ..., nk represents the number of each type of object (in this case, the number of black pens and the number of blue pens)
Applying this formula, we have:
P(7; 3, 4) = 7! / (3! * 4!)
= (7 * 6 * 5 * 4 * 3 * 2 * 1) / ((3 * 2 * 1) * (4 * 3 * 2 * 1))
= 35
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A study was begun in 1960 to assess the long-term effects of smoking Cuban cigars. The study was conducted as part of a public health initiative among residents of Ontario, Canada. Five thousand adults were asked about their cigar smoking practices. After 20 years, these individuals were again contacted to see if they developed any cancers, and if so, which ones. This is an example of a A. Cross-sectional study B. Prospective cohort study C. Retrospective cohort study D. Case-control study E. Randomized clinical trial A major pharmaceutical company is interested in studying the long-term neurological effects of an anesthetic agent that was discontinued ("pulled off the market") in 2000. The plan is to identify patients who received the drug before it was discontinued (via drug administration records) and assess the outcome of subsequent neurological disorder (from physician office visit records) from the years 2010-2020. An effective study design to attempt answering this question would be A. Cross-sectional study B. Prospective cohort study C. Retrospective cohort study D. Case-control study E. Randomized clinical trial Investigators are interested in assessing the prevalence of obesity and diabetes among adolescents. They decide to conduct a survey among high school students during their junior year, asking the students about their current weight and whether they have diabetes, among other questions. This is an example of a A. Cross-sectional study B. Prospective cohort study C. Retrospective cohort study D. Case-control study E. Randomized clinical trial
The first scenario described is an example of a retrospective cohort study. The second scenario suggests a retrospective cohort study as well. The third scenario represents a cross-sectional study, where researchers conduct a survey among high school students to assess the prevalence of obesity and diabetes.
1. In the first scenario, a retrospective cohort study is conducted by tracking individuals over a 20-year period. The study begins in 1960 and collects data on cigar smoking practices. After 20 years, the participants are followed up to determine if they developed any cancers. This type of study design allows researchers to examine the long-term effects of smoking Cuban cigars.
2. The second scenario involves a retrospective cohort study as well. The objective is to study the long-term neurological effects of a discontinued anesthetic agent. The researchers identify patients who received the drug before it was discontinued and then assess the occurrence of subsequent neurological disorders. This study design allows for the examination of the relationship between exposure to the anesthetic agent and the development of neurological disorders.
3. The third scenario represents a cross-sectional study. Researchers aim to assess the prevalence of obesity and diabetes among high school students during their junior year. They conduct a survey to gather information on the students' current weight, diabetes status, and other relevant factors. A cross-sectional study provides a snapshot of the population at a specific point in time, allowing researchers to examine the prevalence of certain conditions or characteristics.
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HELP ASAP ! Write a function rule for the table.
A. ƒ(x) = 3x
B. ƒ(x) = x + 3
C. ƒ(x) = –3 – x
D. ƒ(x) = x – 3
Answer:
The correct answer is D. ƒ(x) = x – 3.
The function rule for a table is a mathematical expression that relates the input values to the output values. In this case, the input values are the numbers in the first column of the table, and the output values are the numbers in the second column of the table.
To find the function rule, we can look for a pattern in the table. We can see that each output value is 3 less than the corresponding input value. For example, when the input value is 1, the output value is -2. When the input value is 2, the output value is -1.
This pattern can be expressed mathematically as ƒ(x) = x – 3. This function rule tells us that the output value is equal to the input value minus 3.
Step-by-step explanation:
Answer number 7 please (if it’s to blurry zoom in)
Answer:
D
the scatter diagram shows a slightly decreasing trend