Answer:
450 cupcakes
Step-by-step explanation:
Let x be the number of cupcakes sold for John's total pay to be the same for both companies
For the first company
Salary = $800/week
Commission is $0.30 per cupcake
For sales of x cupcakes, total commission = 0.30x
Total pay = Weekly salary + Total commission from sales
Total Pay = 800+ 0.3x
For the second company
Salary = 350 /week
Commission: $1.30 per cupcake
For sales of x cupcakes, total commission = 1.30x
Total Pay = Weekly salary + Total commission from sales
Total Pay = 350 + 1.3x
If both pay must be he same,
800 + 0.3x = 350 + 1.3x
800-350 = 1.3x - 0.3x
450 = 1x
x = 450 cupcakes ANSWER
Answer: 450
Step-by-step explanation:
If we let x and y represent the number of cupcakes John sells and his total weekly income, respectively, we get the following system of equations.
=0.35x+845
=1.4x+372.5
Since both equations are solved for y, any substitution for y will result in the following
211.4 x+372.5&=0.35
x+845
1.4x+372.5
=0.35x+845
Solving for x will give us the number of cupcakes John needs to sell weekly for each paycheck to be the same. Doing so, we get
1.4 x+372.5&=0.35 x+845
1.05 x&=472.5x=450
1.4x+372.5
1.05x
x
=0.35x+845
=472.5
=450
Therefore, John needs to sell 450450 cupcakes each week for both salaries to be the same.
Are the linear expressions equivalent? Select from the drop-down menus to correctly complete the statement. The expression 5(x−3)+1 Choose... to the expression 2+5x−16 .
The expression that would render the both the sides equivalent is 3x+2-2
What are like and unlike terms in an expression?In Algebra, the like terms are defined as the terms that contain the same variable which is raised to the same power. In algebraic like terms, only the numerical coefficients can vary. We can combine the like terms to simplify the algebraic expressions.
Given here: The expression 2+8x-16
To find its equivalent we have an incomplete expression 5(x-3)+1
Now 5(x-3)+1=5x-15+1
=5x-14
Thus Adding 3x+2-2 to this expression we get
5x-14+3x+2-2=2+8x-16
Therefore, we can deduce that the missing term must be 3x+2-2
Hence, The missing expression is 3x+2-2
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What is the value of 4.3x10^5
Answer: The value of 4.3x10^5 is 430000.
Step-by-step explanation:
To find the value of 4.3x10^5, you need to multiply 4.3 by 10 raised to the power of 5. This can be written as 4.310^5.
The value of 4.310^5 is 430000.
the lifetime of a certain brand of car battery has an exponential distribution with a mean of 60 months. find the probability that a randomly selected battery of this kind lasts longer than 70 months (round off to second decimal place).
The probability that a randomly selected battery of this kind lasts longer than 70 months is approximately 0.104(rounded off to the second decimal place).
The cumulative distribution function of an exponential distribution with a mean of 60 months is given by:
F(x) = 1 - e^(-x/60)
The probability that a randomly selected battery lasts longer than 70 months is given by:
P(X > 70) = 1 - F(70) = 1 - (1 - e^(-70/60)) = e^(-70/60) = 0.104
So, the probability that a randomly selected battery of this kind lasts longer than 70 months is approximately 0.104 (rounded off to the second decimal place).
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3.3.8 in a precourse, anonymous survey of students in her introductory statistics course, one of the authors asked her students how many hours per week they expected to spend studying statistics outside of class. forty-nine students responded to that question, with an average of 8.2 hours and a sd of 3.79 hours. the data were not strongly skewed. a) identify the observational unit for this study. b) identify the variable of interest and whether it is categorical or quantitative. c) use the theory-based inference applet to calculate and report the 95% confidence interval for the parameter of interest. d) in the context of this study, was it valid to use the theory-based (t-distribution) approach to find a confidence interval? explain your reasoning. e) interpret the 95% confidence interval reported in part (c) in the context of the study.
Above 95% confidence interval for population mean =(6.7149 to 9.2051)
Given that,
3.3.8 One of the writers asked her students how many hours a week they anticipated studying statistics outside of class in a pre-course, anonymous survey for her introductory statistics course. The average response time was 8.2 hours, with a standard deviation of 3.79 hours, from 49 students. Data were not significantly skewed.
To find : a) specify the study's observational unit. b) Determine if the variable is categorical or quantitative and the variable of interest. c) compute and present the 95% confidence interval for the parameter of interest using the theory-based inference applet. d) Was it appropriate to determine a confidence interval using the theory-based (t-distribution) technique in the setting of this study?
sample mean x= 7.960
sample size n= 36.00
sample std deviation s= 3.68
std error sx=s/√n= 0.6133
for 95% CI; and 35 df, value of t= 2.030
margin of error E=t*std error = 1.245
lower bound=sample mean-E = 6.7149
Upper bound=sample mean+E = 9.2051
from above 95% confidence interval for population mean =(6.7149 to 9.2051)
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can you answer this? please
[tex]55 \times 35 = [/tex]
On multiplying 55 × 35, the answer is 1925.
The simplest way to start teaching multiplication is to establish the relationship between the concept and addition, which your pupils should already be familiar with. Make sure your students understand the first principle of multiplication—that it is just repeated addition—before continuing on.
Your youngster can learn that multiplication is actually just a means to repeatedly add multiple groups of the same number by using objects like blocks and small toys. For instance, ask your youngster to arrange the blocks into six groups of three by writing the issue 6 x 3 on a sheet of paper.
5 5
× 3 5
------------
2 7 5
+ 1 6 5 ×
--------------
1925
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If the playing surface of a carom bored is a square of length 28 inches, what is the diagonal length of the playing surface?
Answer:
To find the diagonal length, you can use the Pythagorean theorem.
If one side is 28 inches, and the board is a square, the other side must also be 28 inches.
a = side 1
b = side 2
c = diagonal length
a^2 + b^2 = c^2
(28)^2 + (28)^2 = c^2
784 + 784 = c^2
1568 = c^2
Square root both sides.
c = about 39.6 inches diagonal length
Brittany opened a checking account with $50 she received for her birthday. She deposits $5 of her allowance each week.
Use the unit circle to find the value of sec (0°).
a. Sec (0°) =undefined
b. Sec(0°) = 1
C. Sec (0°) = 0
d. Sec (0°) = 2
Please select the best answer from the choices provided
By using the unit circle , we found that the value of Sec(0°) is (b) Sec(0°) = 1 .
The Unit Circle is defined as a circle that have a radius of 1 which is centered at the origin of a coordinate plane.
The angle in the unit circle are measured in radians.
The Secant function, denoted by Sec(x), is defined as 1/Cos(x) ;
we have to find the value of Sec(0°) ;
So , at 0 degrees, the point (1,0) lies on the unit circle and
the x-coordinate of this point is 1 which is the cos(0) and
the value of Sec(0) = 1/cos(0) = 1/1 = 1
Therefore , the value of Sec(0°) is = 1 .
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Let f(x) = 4x + 3 and g(x)=x²-x+1. Perform the function operation and then find the domain.
g(x)-f(x)
g(x)-f(x) = (Simplify your answer.)
The domain of g(x) - f(x) is all real numbers, or (-∞, ∞).
What is the domain?
The domain of a function is the set of all possible input values (x-values) for which the function is defined and produces a valid output (y-value). In other words, it is the set of values for which the function is valid and can be used without producing any errors or undefined results.
To perform the function operation g(x) - f(x), we need to subtract the function f(x) from the function g(x).
g(x) = x² - x + 1
f(x) = 4x + 3
g(x) - f(x) = x² - x + 1 - (4x + 3)
g(x) - f(x) = x² - 5x - 2
The domain of a function is the set of all possible input values (x-values) for which the function is defined and produces a valid output (y-value).
For the function g(x) - f(x) = x² - 5x - 2, there are no restrictions on the input values, meaning that any value of x can be plugged into the function to produce a valid output.
Therefore, the domain of g(x) - f(x) is all real numbers, or (-∞, ∞).
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A representative sample is one that accurately reflects a larger a) control group. Correct Response b) population. c) correlation coefficient. d) dependent variable.
The statement would e: A representative sample is one that accurately reflects a larger population.
The correct answer is an option (b)
We know that the sampling is used to find insights and observations about a population group.
A representative sample is nothing but a sample / a subset of a population that accurately reflect the characteristics of the larger group.
For example, consider a class of 50 students with 25 girls and 25 boys.
We can generate a representative sample that might include ten students: five girls and five boys.
As we know the samples contain smaller, manageable versions of the larger group, they are useful in statistical analysis when population size is large.
Thus, a representative sample is used for obtaining insights and observations of the targeted population group.
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The complete question is:
A representative sample is one that accurately reflects a larger
a. dependent variable.
b. population.
c. control group.
d. correlation coefficient.
To make mango smoothie, Fritzi mixed some mango and water in the
ratio of 3:4. She made 2800 ml of such smoothie. How many milliliters of water
did she use? A. 1600 B. 1500 C. 1400 D. 1300
If someone can help mee it would be great
Answer: Yes it's 15
Step-by-step explanation:
20/100 x 75 = 15
the london school of economics and the harvard business school have conducted studies of how chief executive officers (ceos) spend their time. these studies have found that ceos spend many hours per week in meetings that include conference calls, business meals, and public events. suppose that the data below show the time spent per week in meetings (hours) for a sample of 25 ceos. 14 15 18 23 15 19 20 13 15 23 23 21 15 20 21 16 15 18 18 19 19 22 23 21 12 (a) what is the least amount of time spent per week on meetings?
The least amount of time spent per week on meetings for the sample of 25 CEOs is 12 hours.
The least amount of time spent per week on meetings for the sample of 25 CEOs can be found by looking at the lowest value in the data set. The data set provided above lists the time spent per week on meetings for a sample of 25 CEOs, and the least amount of time spent is 12 hours per week.
This is the smallest value in the data set, and it represents the minimum amount of time spent on meetings among the CEOs in the sample.
Note that this data is a sample of 25 CEOs and not the entire population of CEOs, so it is not representative of all CEOs. Additionally, the time spent per week on meetings is a quantitative variable, and it is continuous. Therefore, it is recommended to use measures of central tendency (mean or median) and measures of dispersion (standard deviation, range) to make inferences about the population.
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two unit squares share the same center. the overlapping region of the two squares is an octagon with perimeter $3.5$. what is the area of the octagon?
The area of the octagon is 0.875 units square.
Two unit squares share the same center. The overlapping region of the two squares is an octagon with perimeter 3.5.
Area of a triangle:
We need to know how to calculate the area of a triangle, in order to solve this question. The area of a triangle with base b and height h is [tex]\frac{hb}{2}[/tex]. An octagon is a 2D figure with 8 sides.
Let A, B, C, D, E, F, G, and H be eight consecutive vertices of the octagon. Let 0 be the common center of the square units.
Draw the segments OA, OB, OC, OD, OE, OF, OG and OH, connecting the vertices with the common center O of the squares.
The segments divide the octagon into 8 concurrent triangles.
Perimeter of the hexagon=(AB+BC+CD+DE+EF+FG+GH+HA)In these triangles, AB, BC, CD, DE,EF, FG, GH, and HA are the bases; the height is 12 of a unit in all the triangles.
Thus, the area of the octagon=[tex]\frac{1}{2}[/tex]×[tex]\frac{1}{2}[/tex]×(AB+BC+CD+DE+EF+FG+GH+HA)
=[tex]\frac{1}{4}[/tex]×(Perimeter of the hexagon)=14×3.5=3.54=0.875
Therefore, the area of the octagon is 0.875 units square.
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a rectangle is 9 cm longer than it is wide. the width is one seventh of the perimeter. find the length and the width.
If the rectangle is 9 cm longer than it's width , and the width is 1/7th of perimeter , then the length of rectangle is 15 cm and width of rectangle is 6 cm.
let the rectangle's length be = l cm ;
and let the width of rectangle is = w cm ;
the length is 9 cm longer than its width , that means ;
⇒ l = w + 9 ...equation(1)
and the width is 1/7 of perimeter , then
⇒ w = (1/7)(2l + 2w)
⇒ w = 2/7(l + w) .....equation(2) ;
substituting value of equation(1) in equation(2) ;
we get ;
⇒ w = (2/7) × ( w + 9 + w ) ;
on simplifying ,
we get ;
⇒ w = 6 .
from equation(1) ⇒ l = 6 + 9 = 15 .
Therefore , the length is 15 cm and width is 6 cm .
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a study that surveyed a random sample of otherwise healthy high school students found that they are more likely to get muscle cramps when they are stressed. the study also noted that students drink more coffee and sleep less when they are stressed. (a) what type of study is this? observational experiment correct: your answer is correct. (b) can this study be used to conclude a causal relationship between increased stress and muscle cramps? yes no correct: your answer is correct. (c) state possible confounding variables that might explain the observed relationship between increased stress and muscle cramps. (select all that apply.) extra-curricular activities caffeine lack of sleep classes
This is because a survey of healthy high school students who were chosen at random revealed that stress is more likely to produce muscle cramps.
(a) What kind of research is this?
"Observational study" is the study's type.
Reason: This is because a survey of healthy high school students who were chosen at random revealed that stress is more likely to produce muscle cramps.
Can this data be used to draw a causal conclusion about the link between elevated stress levels and muscle cramps?
No, an observational study was unable to draw any conclusions about the link between elevated stress levels and muscle cramps. The Chi-square test can be used to determine the relationship between increasing stress and cramps.
(c) Describe any potential confounding factors that could account for the correlation between greater stress and muscle cramps.
Muscle cramps may be impacted by the increased stress.
In this case, the factors under consideration are qualitative variables. Count the number of times that high school students have visited a doctor with a muscular ailment.
Confounding factors for stress may include anxiety over taking the exam, less sleep, spending more time studying, eating less, drinking more coffee, and other factors.
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Solve the system of equations.
Answer: y,x = -2,3 is your answer. I hope this helps!
Step-by-step explanation:
The function y = f (x) is graphed below. What is the average rate of change of the function f(x) on the interval - 1 ≤ x ≤ 3?
For the function y = f (x), the average rate of change on the interval - 1 ≤ x ≤ 3 is -2.
What is a function?
In mathematics, a function is a unique arrangement of the inputs (also referred to as the domain) and their outputs (sometimes referred to as the codomain), where each input has exactly one output and the output can be linked to its input.
The graph of the function f(x) is graphed and the graph is given.
The average rate of change is a measure of how much the function changed per unit, on average, over that interval.
For a function f(x) at interval [a,b], the average rate of change is given as -
[f(b) - f(a)]/(b - a)
The interval values is given as - [-1,3]
The value for f(a) as seen in the graph is - 4.
The value for f(b) as seen in the graph is - -4.
Substitute the values in the equation -
Average rate of change = [f(b) - f(a)]/(b - a)
A = (-4 - 4)/[3 - (-1)]
A = -8/(3 + 1)
A = -8/4
A = -2
Therefore, the value for average rate of change is -2.
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cathy has obtained a sample mean of 0.7 and , but she cannot remember if the sample size was 20 or 25. she accidentally erased the data file. find the correct sample size.
The sample size of the data which has a sample mean of 0.7 is 20.
What is mean?
Mean is a measurement of a probability distribution's central tendency along the median and mode. It also goes by the name "anticipated value."
Given:
Cathy has obtained a sample mean of 0. 7 and, but she cannot remember if the sample size was 20 or 25,
Calculate the sample size as shown below,
As we know that the variance would be positive,
s² ≥ 1 / (n - 1) [Σ xi²-nx²]
0 ≥ 1 / (n - 1) [Σ xi²-nx²]
[10 - n × x × 0.7²] ≥ 0
n × x × 0.7² ≤ 10
n ≤ 10 / (0.7)²
n ≤ 20.408
Thus, the sample size is 20.
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What is the distance between PQ? Explain. Best explanation gets brainliest
The length of the line segment is given by the distance equation
D = 7.2 units
What is the distance of a line between 2 points?The distance of a line between 2 points is always positive and given by the formula
Let the first point be A ( x₁ , y₁ ) and the second point be B ( x₂ , y₂ )
The distance between A and B is D , and the distance D is
Distance D = √ ( x₂ - x₁ )² + ( y₂ - y₁ )²
Given data ,
Let the distance of the line segment between two points be D
Now , the equation will be
Let the first point be represented as P ( 1 , 6 )
Let the second point be represented as Q ( 7 , 2 )
Now , distance between P and Q is D , and the distance D is
Distance D = √ ( x₂ - x₁ )² + ( y₂ - y₁ )²
D = √ ( 1 - 7 )² + ( 6 - 2 )²
On simplifying the equation , we get
D = √ ( -6 )² + ( 4 )²
D = √ ( 36 + 16 )
D = √ 52
D = 7.2 units
Hence , the distance is 7.2 units
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for how many values of the constant k will the polynomial x2 kx 36 have two distinct integer roots?
There are 2 values of k, 12 and -12, for which the polynomial x^2 + kx - 36 has two distinct integer roots.
The polynomial x^2 + kx - 36 has two distinct integer roots if and only if its discriminant is a perfect square.
The value of the discriminant is given by:
b^2 - 4ac = k^2 + 4 * 36 = k^2 + 144
So, for the polynomial x^2 + kx - 36 to have two distinct integer roots, k^2 + 144 must be a perfect square.
We know that the difference of two consecutive perfect squares is equal to an odd number, so we can start testing values of k by incrementing k by 1 and checking if k^2 + 144 is a perfect square.
Starting with k = 0, we have k^2 + 144 = 144, which is not a perfect square. For k = 1, k^2 + 144 = 145, which is also not a perfect square.
For k = 2, k^2 + 144 = 148, which is still not a perfect square.
We keep incrementing k and checking until we find a value of k such that k^2 + 144 is a perfect square.
When k = 12, we have k^2 + 144 = 168, which is a perfect square (12^2).
Therefore, the polynomial x^2 + 12x - 36 has two distinct integer roots.
We can repeat this process for negative values of k to see if the polynomial has two distinct integer roots for those values.
We find that for k = -12, the polynomial x^2 - 12x - 36 also has two distinct integer roots.
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i need helppp
HELLPP!!!!!!!!!!!
√131 lies between 11 and 12.
What are whole numbers?The numbers that include natural numbers and zero are called whole numbers.
Given is the square root of 131.
We can write the square root of 131 as -
√131 = 11.45
We can write the whole numbers as -
11 < 11.45 < 12
Therefore, √131 lies between 11 and 12.
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Maggie wants to purchase songs from a streaming service. Each song has a cost of x dollars. Which situation can be represented by this inequality?
8 + 4x < 12 + 3x
The inequality says that the cost of each song is less than 4 dollars.
Which situation can be represented by this inequality?We want to see which situation can be represented by the inequality below.
8 + 4x < 12 + 3x
Where we know that each song costs x dollars.
The situation represented by that inequality can be:
"8 dollars plus 4 songs has less value than 12 dollars plus 3 songs"
We can also simplify the inequality to get:
8 + 4x < 12 + 3x
4x -3x < 12 - 4
x < 4
We also can see that the cost of each song is less than $4.
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SOMEONE PLS HELP TYSM
The median of the given set of numbers is 82.
What is Median?Median is the middle element when the data set is arranged in an increasing or decreasing order.
Given is a stem and leaf plot.
We have to write each of the corresponding number in stem attached with each of the corresponding number in leaf plot.
So the numbers in the first row will be 71, 75, 77 and 78.
Numbers in the second row will be 80, 80, 81, 82, 84, 85, 86, 86, 87, 89.
Number in the third row will be 95.
Writing the numbers from the plot, we will get the values as,
71, 75, 77, 78, 80, 80, 81, 82, 84, 85, 86, 86, 87, 89, 95.
The numbers are already in the increasing order.
There are 15 number of data in the set.
Median is the middle element, that is 8th element, which is 82.
Hence the median of the data is 82.
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the graph of a twice-differentiable function f is shown below(in image). if f(2)=0, which of the following is true
A) f(2)
B) f’’(2)
C) f’(2)
D) f(2)
E)f’’(2)
Answer:
The correct answer is C f(2)
To rent a certain meeting room, a college charges a reservation fee of $35 and an additional fee of $5.80 per hour. he history club wants to spend less than $69.80on renting the meeting room. What are the possible amounts of time for which they could rent the meeting room?
The possible amounts of time for which they could rent the meeting room is 1.71 hours
How to determine the hours?The question states that
The college charges a reservation fee of $35 and an additional fee of $5.80 per hour.The history club wants to spend less than $69.80on renting the meeting roomThis implies that
35x + 5.80x ≤69.80
Solving the inequality to have
40.8x ≤69.80
Making x the subject of the relation we have
x≤1.71
In conclusion it takes the college 1.71 of time for them to rent the meeting room
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You started a project on 9/29/2019. the project ended on 08/01/2022. how many working days did you have for the entire project?
a. 741 b. 1037 c. 1287 d. 832
write an equivalent expression by distributing the “-“ sign outside the parenthesis: -(-0.1p+4)
The equivalent of the expression -(-0.1p+4) is 0.1p-4
What is equivalent of expression?Equivalent expressions are expressions that work the same even though they look different. If two algebraic expressions are equivalent, then the two expressions have the same value.
For example: 3(x + 2) and 3x + 6 are equivalent expressions because the value of both the expressions remains the same for any value of x. 3x + 6 = 3 × 4 + 6 = 18. and can also be written as 6(x² + 2y + 1) = 6x² + 12y + 6.
Similarly -( - 0.1p + 4) can be written in another for by multiplying the negative sign with every term in the parentheses.
therefore -1× -0.1p + -1×4 = 0.1p -4
This means -(-0.1p+4) and 0.1p -4 are equivalent
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PLEASE HURRY,TEST QUESTION,LIMITED TIME!
Question- Write the standard form equation of the circle given the center of (-1,0) and the circumference of 8π. Show all work using the equation editor to calculate the missing pieces of the equation.
Answer: (x+1)^2 + (y-0)^2 = 8pi^2
Step-by-step explanation:
Which of the following are true about ALL parallelograms? Select each correct
answer.
a. Opposite sides are congruent.
b. Opposite sides are parallel.
c. Opposite angles are congruent.
d. The diagonals bisect each other.
e. The diagonals are congruent.
f. Consecutive angles are congruent.
g. Opposite angles are supplementary.
h. Consecutive angles are supplementary.
following are true about ALL parallelograms are:
a. Opposite sides are congruent.
c. Opposite angles are congruent.
d. The diagonals bisect each other.
h. Consecutive angles are supplementary.
What is parallelogram?
A parallelogram is a straightforward quadrilateral with two sets of parallel sides in Euclidean geometry. A parallelogram's facing or opposing sides are of equal length, and its opposing angles are of similar size.
There are six crucial parallelogram characteristics to be aware of:
Congruent sides are those when AB = DC.Congruent opposite angels are D = B.Consecutive angles are supplementary.All angles are correct if just one of them is.A parallelogram's diagonals cut each other in half.A parallelogram's diagonals divide it into two congruent.A rhombus is what we have when all of the sides of a parallelogram are congruent. Rhombi can use the characteristics of parallelograms.
We have a quadrilateral that is referred to as a trapezoid if just one pair of its sides are parallel. While the nonparallel sides are referred to as legs, the parallel sides are known as bases. We have what is referred to as an isosceles trapezoid if the legs are congruent.
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