Answer:
times 2075 by .30 and that's your answer
The total retail cost of all the jewelry is $2697.5
What is Percentage?To determine the quantity or percentage of something in terms of 100, use the percentage formula. Per cent simply means one in a hundred. Using the percentage formula, a number between 0 and 1 can be expressed. A number that is expressed as a fraction of 100 is what it is. It is mostly used to compare and determine ratios and is represented by the symbol %.
Given:
Maybell just purchased $2075 worth of jewelry.
Now, marks up her cost by 30% then
= 2075 x 30/100
= 622.5
Thus, the total retail cost of all the jewelry
= 2075+ 622.5
= $2697.5
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6x +2(5x - 6) *
Your answer
Which expression is equivalent to -8 + 7.25 – 6 + 0.5?
A. 7.25 +0.5 - (8 - 6)
B. -(8 + 6) + (7.25 +0.5)
C.-13 + 7.75
D. -14 - 7.25
Sully saves 2/3 of her paycheck for bills. If she makes $1,983, how much does she
have to pay her bills?
Write the equation for the inverse of the function. y=Arctan (x+pi/2)
Answer:
the answer is B
Step-by-step explanation:
PLEASE HELP im literally gonna cry
please answer this correctly please for extra points and brainliest PLEASE
Answer:
4x+10
Step-by-step explanation:
Slope form: mx+b
Slope formula: y2-y1/x2-x1
(2, 18) (3,22)
22-18=4
3-2= 1
4/1=4
4x+10
In a study of speed dating, female subjects were asked to rate the attractiveness of their male dates, and a sample of the results is listed below (1not attractive; 10extremely attractive). Find the range, variance, and standard deviation for the given sample data. Can the results be used to describe the variation among attractiveness ratings for the population of adult males
Answer:
[tex]Range = 7[/tex]
[tex]s^2 = 3.53[/tex] -- Variance
[tex]s = 1.88[/tex] --- Standard Deviation
No, it can not be used
Step-by-step explanation:
Given
I'll use the data in the attachment to answer the question.
(a) Range:
[tex]Range = Highest - Lowest[/tex]
From the attached data.
[tex]Highest = 10[/tex]
[tex]Lowest = 3[/tex]
So:
[tex]Range = 10 - 3[/tex]
[tex]Range = 7[/tex]
(b) Variance:
We start by calculating the mean:
[tex]\overline x = \frac{\sum x}{n}[/tex]
[tex]\overline x = \frac{5 + 8 + 3 + 8 + 6 + 10 + 3 +......+ 8+8+7}{26}[/tex]
[tex]\overline x = \frac{171}{26}[/tex]
[tex]\overline x = 6.58[/tex] --- approximated
The sample variance is then calculated using:
[tex]s^2 = \frac{\sum(x_i - \overline x)^2}{n-1}[/tex]
This gives:
[tex]s^2 = \frac{(5-6.58)^2+(8-6.58)^2+(3-6.58)^2+(8-6.58)^2+..............+(8-6.58)^2+(8-6.58)^2+(7-6.58)^2}{25-1}[/tex]
[tex]s^2 = \frac{88.3464}{25}[/tex]
[tex]s^2 = 3.53[/tex] --- approximated
(c) Standard Deviation.
This is calculated as:
[tex]s = \sqrt{s^2[/tex]
Substitute 3.53 for [tex]s^2[/tex]
[tex]s = \sqrt{3.53}[/tex]
[tex]s = 1.88[/tex] --- approximated
(d) No, it can not be used because the selected sample is too small to represent the total population and as such the result of the measure of variations can not be used.
Consider the following hypothesis test: H 0: 50 H a: > 50 A sample of 50 is used and the population standard deviation is 6. Use the critical value approach to state your conclusion for each of the following sample results. Use = .05. a. With = 52.5, what is the value of the test statistic (to 2 decimals)? Can it be concluded that the population mean is greater than 50? Select b. With = 51, what is the value of the test statistic (to 2 decimals)? Can it be concluded that the population mean is greater than 50? Select c. With = 51.8, what is the value of the test statistic (to 2 decimals)? Can it be concluded that the population mean is greater than 50? Select
Answer:
Part a:
The calculate value of Z = 2.946 lies in the critical region so the null hypothesis is rejected and alternate hypothesis is accepted that population mean is greater than 50.
Part b:
The calculate value of Z = 1.17851 does not lie in the critical region so the null hypothesis is accepted that population mean is not greater than 50.
Part c:
The calculate value of Z = 2.1213 lies in the critical region so the null hypothesis is rejected and concluded that population mean is greater than 50.
Step-by-step explanation:
Data as given
H 0: μ ≤ 50 against the claim H a: μ> 50 one tailed test
Z (0.05)= ± 1.645
Sample size n= 50
Using the central limit theorem
Population Standard Deviation= σ=s=6
X= 52.5 , 51 and 51.8
Part a:
Z= x-μ/ s/ √n
Z= 52.5- 50 / 6/ √50
Z= 2.5/0.84853
z= 2.946
The calculate value of Z = 2.946 lies in the critical region so the null hypothesis is rejected and alternate hypothesis is accepted that population mean is greater than 50.
Part b:
Z= x-μ/ s/ √n
Z= 51- 50 / 6/ √50
Z= 1/0.84853
z= 1.17851
The calculate value of Z = 1.17851 does not lie in the critical region so the null hypothesis is accepted that population mean is not greater than 50.
Part c:
Z= x-μ/ s/ √n
Z= 51.8- 50 / 6/ √50
Z= 1.8/0.84853
z= 2.1213
The calculate value of Z = 2.1213 lies in the critical region so the null hypothesis is rejected and concluded that population mean is greater than 50.
Leo has 2 5/8 ounces of sunblock.
He uses one third of an ounce at
the beach. How much does he
have left?
Answer:
2 7/24
Step-by-step explanation:
Answer:
Step-by-step explanation: 6
What is the slope of the line with the equation -5 - x = y?
O 5
O 1
O -1
O-5
Answer:
-1
Step-by-step explanation:
What ever number is in front of x that is the answer. If there is only a x then it means 1.
please help me please i really need help please
Pls help me
I will give brainliest
Answer:
I am you helper
Step-by-step explanation:
Solve for the value of W
Answer:
8°
Step-by-step explanation:
5w + 1° + 7w - 7° + 90° = 180° { being linear pair }
12w = 180° - 84°
12w = 96°
w = 96° / 12
w = 8°
Hope it helps :)
Answer:
5w+1+90+7w-7=180(linear pair)
12w=180-84
w=96/12=8
a cash prize of $4,800 is awarded at a fundraiser. if 1200 ticket's are sold at $9 each find the expected value
Answer:
is 10,800
Step-by-step explanation: you multiply 1,200 x 9
A park ranger wants to know the average time it takes hikers to hike a trail. There is an average of 1,245 hikers on the trail in a year. How can he find a reasonable estimate for the amount of time it takes to hike the trail? A time any hiker on the trail and use that time
B time himself on the trail and use that time
C time 100 hikers and average their times
D time 3 hikers and average their times
Answer:
B
Step-by-step explanation:
the reason why is a bigger sample size and a different types of people in a 100 than 3 or than himself
Dan used 942 units of electricity from July to October.
The meter reading in July was 32,347 units
Work out the meter reading in October
Answer:
89n
Step-by-step explanation:)
Answer:
33289
Step-by-step explanation:
July reading + Useage
= 32347 + 942 = 33289
Convert x + 3y = 9 into slope-intercept form
Answer:
3y=-x+9
y=1/3x+3
Step-by-step explanation:
Factor 25b – 14b
b(25 – 14)
b(25 + 14)
-b(25 – 14)
-b(25 + 14)
What is the measure of N
Answer:
C) 27 degrees
Step-by-step explanation:
N+63=90
-63. -63
N=27
Can someone please help me with this problem
Answer:
the piont was 10.15 away from the that is dead see yea
Step-by-step explanation:
Select the best answer.
Increasing the sample size of an opinion poll will reduce the :____________
(a) bias of the estimates made from the data collected in the poll.
(b) variability of the estimates made from the data collected in the poll.
(c) effect of nonresponse on the poll.
(d) variability of opinions in the sample.
(e) variability of opinions in the population.
Answer: D
Step-by-step explanation:
the 4th one nzoabsjqnnansiwwna
how do i do math qyestions
Answer:
By solving them of course ;-;
Answer: that depends on the qyestion
If Dan had 20 packs of gum and he didn't have any this week and next week he had 10 packs left. What happened to the other 10 packs of gum?
Answer:
He ate it or he may have ate some in some packs then refilled the other packs.
Step-by-step explanation:
Answer:
Someone else ate them!
please help will give brainliest if can :)
Answer:
56 degrees
Step-by-step explanation:
Hope this helps
Answer:
124 degrees
Step-by-step explanation: I added them both together
3x + y = 19
2x - y = 6
Answer:
Step-by-step explanation:
(x,y)=(5,4)
An optical inspection system is used to distinguish among different part types. The probability of a correct classification of any part is 0.93. Suppose that three parts are inspected and that the classifications are independent. Let the random variable X denote the number of parts that are correctly classified. Determine the probability mass function of X.
Probability Mass Function of X
x f(x)
0
1
2
3
Answer:
Follows are the solution to this question:
Step-by-step explanation:
Let P(X = x) mark x model number classified correctly.
The mass function of the probability:
[tex]\to f(0) = P(X=0) = (0.03)^3 = 0.0000\\\\\to f(1) = P(X=1) = (3 C_1)\times (0.97)\times (0.03)^2 = 0.0026\\\\\to f(2) = P(X=2) = (3 C_2)\times (0.97)^2 \times (0.03) = 0.0847\\\\\to f(3) = P(X=3) = (0.97)^3 = 0.9127\\\\[/tex]
[tex]x \ \ \ \ f(x) \\\\0\ \ \ \ 0.0000\\\\1\ \ \ \ 0.0026\\\\2\ \ \ \ 0.0847\\\\3\ \ \ \ 0.9127[/tex]
Create a word problem that can be represented by the following system of equations.
X + y = 50
2x + 4y = 120
Answer:
Step-by-step explanation:
You run a train station that sells children tickets for 2 dollars and adult tickets for 4 dollars
The total tickets sold on Saturday was 50
The train station made 120
How many adult tickets and kid tickets did they sell?
(40 kids, 10 adults)
A pen cost $40 and the book cost $10
The word problem that can be represented by the equation is: John bought one pen and one book for $50. He went the next day and bought 2 pens and 4 books for $120.
x + y = 50 ....... i
2x + 4y = 120 .... ii
Let x = pen
Let y = book.
From equation i, x = 50 - y
Since 2x + 4y = 120
2(50 - y) + 4y = 120
100 - 2y + 4y = 120
Collect like terms
-2y + 4y = 120 - 100
2y = 20
y = 10
Therefore, a book cost $10
Since x + y = 50
x + 10 = 50
x = 50 - 10
x = 40
A pen cost $40
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The average cost for vacation is $1050 if a family borrows money for the vacation at an interest rate of 11.9% for six months what is the total cost of the vacation including the interest on the loan
If A = (-2,3), what is ry-axis o D3(A)?
A (-6,-9)
B (9,-6)
C (5,6)
D (6,9)
1/4( 16x-8)-8x= -1/3 ( ? x+9)
What is the only value you can substitute to have no values of x?
What number would I need to change 9 to have all values of x?
Answer:
d.16
Step-by-step explanation:
HELP PLEASE ITS URGENT
What is m
Look at the image above
Answer:
m∠F = 90°
Step-by-step explanation:
By the property of a kite,
"One pair of the opposite angles are congruent"
m∠E ≅ m∠G
m∠E = m∠G = 113°
Sum of the interior angles of a polygon = (n - 2) × 180°
Here, n = number of sides of the polygon
For a kite, n = 4
Therefore, sum of the interior angles of the given kite = (4 - 2) × 180°
= 360°
Therefore, m∠E + m∠F + m∠G + m∠H = 360°
113° + m∠F + 113° + 44° = 360°
m∠F = 360° - 270°
m∠F = 90°