Answers
Answer:
7x+2/x² +x +2
that's my answer
Related Questions
an independent polling agency was hired to track the preferences of registered voters in a district for an upcoming election. the polling agency divided the district into twenty regions and believes that the regions are similar to one another in their composition. the agency then randomly selected two of the regions and surveyed all registered voters in both regions. which of the following best describes the sampling method used by the polling agency?
Answers
Given the partitioning of the district into twenty sections, the independent polling firm employed (C) stratified random sampling as its sample technique.
Strata are established in stratified random sampling, also known as stratification, based on the shared characteristics or attributes of the participants, such as wealth or level of education. Examining life expectancy and population demographics is just one of the many benefits and uses of stratified random sampling.
Simplified random sample takes less planning than stratified sampling, according to a comparison.
Simplified random sampling is cheaper, faster, and requires less planning than stratified sampling, which may also be more expensive.
This is stratified random sampling since the independent polling organization first divided the district into twenty regions before randomly choosing from them, making those regions strata.
Stratified sampling, a sort of random sampling, splits a population into smaller subgroups, or strata, based on shared characteristics of the participants. Then, to create the final sample, random selection is used to choose individuals from each stratum.
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A submarine is -18 feet below the surface of the ocean. The submarine then dove to a depth of -50 feet below the surface of the ocean. What was the change in depth?
Answers
Answer:
-32ft
Step-by-step explanation:
Given parameters:
Original depth of the submarine = -18ft
New depth = -50ft
Unknown:
Change in depth = ?
Solution:
The change in depth will be the difference in depth between the new and original depth.
Change in depth = New depth - original depth
Change in depth = -50ft - (-18ft) = -32ft
The change in depth of the submarine is -32ft.
What is the surface area of the sphere shown below with a radius of 7?
1
7
A. 49, sq. units
B. 65 sq. units
C. 196 sq. units
D. 457 sq. units
SUBMIT
Answers
Answer:
c
Step-by-step explanation:
the surface area for spheres is
4 × π × r²
4 × π × (7²) = 196 π
What is the degree measure of the smaller angle between the hour and minute hands of the clock at 5:10 PM?
F. 110°
G. 105°
H. 100°
J. 95°
K. 90°
Answers
Answer:
At 5:10 PM, the minute hand is at the 2-minute mark, and the hour hand is between the 5 and 6 marks, closer to the 5.
The minute hand is at the 2-minute mark, which is 1/30th of the way around the clock face. So, the minute hand has traveled 1/30th of a full circle, which is 360°, or 12°.
The hour hand is between the 5 and 6 marks, closer to the 5. It has passed the 5 and is 1/6th of the way to the 6. Since the clock face is divided into 12 hours, 1/6th of the way from 5 to 6 is 5 + 1/6 = 5.166... hours.
Each hour mark represents 30 degrees, so the hour hand has traveled 5.166... × 30 = 155 degrees from the 12 o'clock position.
The smaller angle between the hands is the angle between the hour hand and the minute hand that is less than 180 degrees. We can find this angle by subtracting the smaller angle between the hands from 360 degrees.
To find the smaller angle between the hands, we can subtract the angle traveled by the hour hand from the angle traveled by the minute hand:
12° - 155° = -143°
The negative sign indicates that the angle is measured clockwise from the 12 o'clock position. To find the positive angle between the hands, we add 360 degrees:
360° - 143° = 217°
Therefore, the degree measure of the smaller angle between the hour and minute hands of the clock at 5:10 PM is approximately 217 degrees. Since this value is not one of the answer choices, we can round it to the nearest choice, which is F. 110°
PLEASE HELP ITS MATH THANK YOUUUU
Answers
Answer:
sorry i don't know
Step-by-step explanation:
sorry
9/3=3x1=3
Each of four friends orders a sweatshirt from a catalog. There are 16 colors of sweatshirts, 7 of which are all cotton and 9 of which are a blend. Each one orders a different color (no repeats) at random. What is the probability that the friends order only cotton sweatshirts?
Answers
Answer:
1/52.
Step-by-step explanation:
The first friend's chance of picking a cotton shirt = 7/16, then the second one has a chance of 6/15 and so on ...
So the required probability is
7/16 * 6/15 * 5/14 * 4/13
= 840 / 43680
= 1/52.
Answer:
Step-by-step explanation:
There are total 16 sweatshirts.
Now the probability that first friend will get the cotton sweatshirt\(=\frac{7}{16}\)
probability that the second friend wiil get the cotton sweatshirt\(=\frac{6}{15}\)
similarly,
probability that the third and fourth friend will get the cotton sweatshirt
\(=\frac{5}{14} and \frac{4}{13}\)
Therefore, the probability that the friends order only cotton sweatshirt\(=\frac{7}{16} \frac{6}{15} \frac{5}{14} \frac{4}{13}\)\(=\frac{840}{175500}\)
60% of blank =42 fill the Missing number
Answers
Answer:
70
Step-by-step explanation:
60/100 = 42/X
(42*100)/60 = 70
answer this please!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
200
Step-by-step explanation:
\(a^{2}\) + \(b^{2}\) = \(c^{2}\)
\(120^{2}\) + \(160^{2}\) = \(c^{2}\)
14400 + 25600 = \(c^{2}\)
40000 = \(c^{2}\)
\(\sqrt{40000}\) = \(\sqrt{c^{2} }\)
200 = c
Jesus love you.
Carlos read 150 words in one minute. He
read 5 times as many words as his younger
brother. How many words did his younger brother
read in one minute?
Answers
Answer:
30
Step-by-step explanation:
150/5 = 30
Answer: 30
Step-by-step explanation:
I have no equal sides what am i
Answers
Answer:
Scalene
Step-by-step explanation:
a scalene triangle has three sides different angles none of its sides are equal in length
Answer:
A scalene triangle or quadrilateral has no equal sides.
Which measurement is most accurate to describe the weight of an apple
Answers
Answer: (BRAINLIEST PLEASE)
120 g.
Step-by-step explanation:
Answer:
1/4 of a pound
Step-by-step explanation:
One of the advantages of the use of experimental designs in evaluation over other designs is that experimental designs:
Offer researchers the most advantageous position from which to infer causal relationships about the effect of the intervention.
Gives researchers access to people, such as the deceased, who are inaccessible to other forms of evaluation.
Reduces the likelihood of experimenter effects occurring.
Offers evaluators access to large samples of people.
Answers
Experimental designs offer researchers the most advantageous position to establish causal relationships between interventions and outcomes.
By randomly assigning participants to either an intervention group or a control group, researchers can confidently attribute any differences between the two groups to the intervention, rather than other extraneous variables. This level of control is not typically possible in other designs, such as observational studies or non-experimental designs, which are more prone to confounding variables and other biases. Experimental designs also allow for the manipulation of variables, which is not possible in other designs. For example, researchers can manipulate the dosage, timing, or mode of delivery of an intervention to investigate the optimal conditions for producing desired outcomes. This level of control enables researchers to identify the most effective interventions and to refine them for better outcomes. Moreover, experimental designs allow for the replication of studies, which increases the confidence in the results obtained. The results obtained from one study can be replicated using different samples and contexts, which increases the generalizability and external validity of the findings. In summary, experimental designs offer researchers the most powerful tools to investigate the causal relationship between interventions and outcomes, with high levels of control, manipulation, and replication. These designs are particularly useful for evaluating new interventions or interventions with unknown effects, and for informing evidence-based practice and policy.
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A city has a population of 400,000 people. Suppose that each year the population grows by 6.25%. What will the population be after 15 years?
Answers
P(t) = Initial Population * (1 + rate)^t
P(t) = 400,00*(1+0.0625)^t
P(t)= 400,00*(1+0.0625)^15
Pt=400
What is the remainder of 8001 divided by 6
Answers
Answer:
The remainder is 3
Step-by-step explanation:
The solution is in the image
large sample significance tests for a single proportion are based on the .group of answer choices a. statistic binomial b. distribution test
c. uniform distribution
Answers
Large sample significance tests for a single proportion are based on the statistic binomial. the correct option is A
What is significance tests?Significance test can be defined as tests for statistical significance indicate whether observed differences between assessment results occur because of sampling error. Significance tests give a formal process for using sample data to evaluate the likelihood of some claim about a population value.
Therefore a Large sample significance tests for a single proportion are based on the statistic binomial.
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A pizza parlor offers a choice of 12 different toppings. How many 2-topping pizzas are possible? (no double-orders of toppings are allowed)
Answers
==========================================================
Explanation:
There are 12 choices for the first topping and 11 for the next topping. The decrease is to account for the fact we cannot select a repeat topping.
That gives 12*11 = 132 permutations. If order of toppings mattered, then this would be our final answer.
However, the topping order doesn't matter. So we need to divide by 2 to correct for the double counting.
There are 132/2 = 66 combinations.
------------
Alternative Method:
n = 12 toppings are available and r = 2 selections are allowed
Order doesn't matter so we use the nCr combination formula
\(n C r = \frac{n!}{r!(n-r)!}\\\\12 C 2 = \frac{12!}{2!*(12-2)!}\\\\12 C 2 = \frac{12!}{2!*10!}\\\\12 C 2 = \frac{12*11*10!}{2!*10!}\\\\ 12 C 2 = \frac{12*11}{2!}\\\\ 12 C 2 = \frac{12*11}{2*1}\\\\ 12 C 2 = \frac{132}{2}\\\\ 12 C 2 = 66\\\\\)
There are 66 combinations
Notice the 2nd to last step involves 132/2 which was mentioned in the previous section.
Select the true statement.
Answers
1 1/2 yards = 54 inches.
Answer: D) 54 inches = 1 1/2 yards
explanation: 1 1/2 yards = 54 inches.
Please answer this correctly
Answers
Answer:
1/2
Step-by-step explanation:
The numbers greater than 6 or less than 3 are 7, 8, 2, and 1.
4 numbers out of 8.
4/8 = 1/2
P(greater than 6 or less than 3) = 1/2
In ∆BCD if BC=BD, m<B=(13x-35)°, m<C=(5x-19)°, and m<D=(2x+14)°, find x and the measure of each angle
Answers
Answer:
Value of x = 11 ° , ∠B = 108° ,∠C = 36° ,∠D = 36°
Step-by-step explanation:
Given :
In ΔBCD , BC = BD And ∠B= (13x-35)° , ∠C= (5x-19)° ,∠D=(2x+14)°
To Find :
value of x and ∠D , ∠B and ∠C
Solution:
∵ BC=BD , So ∠C = ∠D
Therefore 5x-19 = 2x+14
3x = 33 , ∴ x=11°
So, ∠B = (13×11) - 35 = 108°
∠C = (5×11)-19 = 36°
∠D= (2×11) +14 =36°
Nicole bought six pounds of apples at $1.50 per pound. The store had a discount of $2 Nicole bought six pounds of apples at $1.50 per pound. The store had a discount of $2 off her total purchase. Nicole and her friend then divided the cost of the purchase evenly. Which expression can be used to determine how much Nicole and her friend each paid for the apples? Nicole bought six pounds of apples at $1.50 per pound. The store had a discount of $2 off her total purchase. Nicole and her friend then divided the cost of the purchase evenly. Which expression can be used to determine how much Nicole and her friend each paid for the apples?Nicole bought six pounds of apples at $1.50 per pound. The store had a discount of $2 off her total purchase. Nicole and her friend then divided the cost of the purchase evenly. Which expression can be used to determine how much Nicole and her friend each paid for the apples?Nicole bought six pounds of apples at $1.50 per pound. The store had a discount of $2 off her total purchase. Nicole and her friend then divided the cost of the purchase evenly. Which expression can be used to determine how much Nicole and her friend each paid for the apples? Nicole bought six pounds of apples at $1.50 per pound. The store had a discount of $2 off her total purchase. Nicole and her friend then divided the cost of the purchase evenly. Which expression can be used to determine how much Nicole and her friend each paid for the apples? Nicole bought six pounds of apples at $1.50 per pound. The store had a discount of $2 off her total purchase. Nicole and her friend then divided the cost of the purchase evenly. Which expression can be used to determine how much Nicole and her friend each paid for the apples?
Answers
6 pounds * $1.50 per pound = $9
Then, we can subtract the discount:
$9 - $2 = $7
Since Nicole and her friend split the cost evenly, we can divide $7 by 2:
$7 / 2 = $3.50
Therefore, each of them paid $3.50 for the apples.
The expression that can be used to determine this is:
($6 * $1.50 - $2) / 2 = $3.50
where $6 is the total cost of 6 pounds of apples at $1.50 per pound and $2 is the discount
Polynomial multiple choice help
Answers
2. A graph
4. C- Neither even or odd
5. A- 32
—
3. A or D (not sure)
1. A,B or C but not D (I don’t think)
Hope this helps :)
Find the value of X, I need help solving this.
Answers
Answer:
The answer is 21
Step-by-step explanation:
21x4+2=86
Answer:
C) 21
Step-by-step explanation:
The given angles are vertical so they have the same measurement
4x + 2 = 86° subtract 2 from both sides
4x = 84 divide both sides by 4
x = 21
A line has a slope of 0 and it includes the pointes (-3,-9) and (5,j) what is the value of j?
Answers
Step-by-step explanation:
where slope = O
SO ,the line is parallel to X axis passing through -9
therefore j = _ 9
For each of the 6 coverage areas of a standard homeowners insurance policy, briefly describe what they cover: Dwelling, Other Structures. Personal Property,
Loss of Use, Personal Liability, Medical Payments
Answers
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I NEED HELP pleaseeeeeeeeeeeee
a guy combined a 10oz substance containing 6% cottonseed with another substance containing 12% cottonseed to create a substance with 8% cottonseed. How many ounces of the 12% substance must he use?
Answers
By solving a linear equation for the concentration we will see that the guy needs to use 18 ounces.
How many ounces of the 12% substance must he use?We know that the guy used 10 ounces of 6% solution with x ounces of a 12% solution to make a 8% solution, then we can write the concentration equation:
0.06*12 + 0.12*x = (12 + x)*0.08
So we just need to solve a linear equation for x.
0.06*12 + 0.12*x = (12 + x)*0.08
0.06*12 + 0.12*x = 12*0.08 + x*0.08
0.12*x - 0.08*x = 12*0.08 - 0.06*12
0.04*x = 0.06*12
x = 0.06*12/0.04 = 18
Which means that the guy needs to use 18 ounces of the 12% substance.
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Which of the following could be the ratio between the lengths of the two legs
of a 30-60-90 triangle?
Check all that apply.
A. √2:2
B. √√3:√√3
C. √5:3
D. 1 √3
□ E. 1: √2
O F. 2:3
SUBMIT
Answers
Answer: E
Step-by-step explanation:
A rectangular prism has a width of x2 inches and a length of xy2 inches and a height of xy inches.
Which expression represents the volume of the rectangular prism in cubic inches?
2x^2y^2
2xy^3 + 2x^2y
2x^4y^3
x^3y^2
Answers
In this case, the width is x^2 inches, the length is xy^2 inches, and the height is xy inches.
Substituting these values into the formula, we get:
V = (xy^2)(x^2)(xy)
Simplifying, we get:
V = x^4y^3
Therefore, the expression that represents the volume of the rectangular prism in cubic inches is x^4y^3.
50 POINTS!! SHOW ALL THE WORK TY (Graph as well)
Answers
Answer:
see below
Step-by-step explanation:
y = a cos ( bx)
The amplitude is |a|
y = -2cos (3x) so the amplitude is |-2| = 2
The period is 2pi/b
period is 2pi/3
Select the solution to the following system of equations:
Answers
Answer:
4x+2y=4
3x-y=-7
first one by 3
second by 4
12x+6y=12
12x-4y=-28
subtract
10y=40
y=4
plug in
3x-4=-7
add 4
3x=-3
x=-1
(-1,4)
c
Hope This Helps!!!
Answer: third option
Step-by-step explanation:
There are 2 ways to go about systems of equations normally, and that's elimination and substitution. For this particular problem, I would recommend elimination.
we see the first equation 4x+2y=4
we want to be able to simplify it as much as possible (so it's easier to solve)
so we divide all the terms by 2, giving 2x+y=2.
the second equation can't be simplified, so we set up the elimination method.
2x+y=2
-3x-y=-7
multiplying both equations by 2 and 3, we subtract them and get that y equals 4, which is clearly the answer.
devide 255 in the ratio 3:7:7:10
Answers
Answer:5
Step-by-step explanation:
5098