Answer:
The best option is: When the number of procrastination days is 0, the predicted grade is 96.5 points.
Option D is correct option.
Step-by-step explanation:
The regression equation given is: [tex]y= -3.64x + 96.5[/tex]
where x represents the number of procrastination days and ŷ is the predicted grade.
Which statement best describes the meaning of the y-intercept of the regression line?
First we need to identify what is y-intercept in regression line.
The y-intercept of the regression line is the value of output y when x is 0.
So, when x = 0, the value of output is y-intercept
So, if x = 0
we get:
[tex]y= -3.64x + 96.5\\y= -3.64(0) + 96.5\\y=0+96.5\\y=96.5[/tex]
So, the best option is: When the number of procrastination days is 0, the predicted grade is 96.5 points.
Option D is correct option.
Answer:
i just did the test, the person above me is correct!
Step-by-step explanation:
A recipe calls for 3 cups of water for every 4 cups of flour.
What is the unit rate of water to flour, written as a decimal?
Divide: 1.98 divided by 0.09
Jean's bedroom is 12 feet by 12 feet. She has chosen a carpet which costs $28.10 per square yard. This includes installation.
Answer:
$449.60
Step-by-step explanation:
12 x 12 = 144, her room is 144 square feet. One yard is three feet, making a square yard equal to 9 square feet. 144 divided by 9 is 16 square yards. Now we do 16 times the installation cost $28.10. So 16 x 28.10 = 449.6, or $449.60.
I hope this helps!
In a certain chemical, the ratio of zinc to copper is 4 to 19. A jar of the chemical contains 760 grams of copper. How many grams of zinc does it contain?
1) 760 grams
2) 3,610
3) 30,400
4) 190 or 160 grams
What are the
Solutions of 3x' -x+7 =0?
A. x-2+İN83 or x- 2- i88
B. X-1+N83 orx= 1-iN88
C. x- 1+9/ or x 1-9;
D. X- 2+9i or x- 2-9/
Answer:
x = 1+√83 i/6 and 1-√83 i/6
Step-by-step explanation:
Given the quadratic expression;
3x^2-x+7 =0
Using the general foemula to find x
x = -b±√b²-4ac/2a
From the equation
a = 3, b = -1 and c = 7
Substitute
x = -(-1)±√(1)²-4(3)(7)/2(3)
x = 1±√1-84/6
x = 1±√-83/6
x = 1±√83 i/6
x = 1+√83 i/6 and 1-√83 i/6
What are the coefficients in the algebraic expression
I need this answered ASAP !!!! Right answers only
What is the percent of Cr in
Cr203?
(Cr = 52.00 amu, O = 16.00 amu)
[?]%
Answer:
68.42%
Step-by-step explanation:
We need to find the percent of Cr in [tex]Cr_2O_3[/tex].
Mass of Cr = 52 amu
Mass of O = 16 amu
Firstly, we will find the molar mass of [tex]Cr_2O_3[/tex] as follows :
M = 2(52) + 3(16)
M = 152 amu
Percent of Cr in [tex]Cr_2O_3[/tex] will be :
[tex]Cr=\dfrac{2\times 52}{152}\times 100\\\\=68.42\%[/tex]
Hence, the required percentage is 68.42%.
What is the slope of the line that passes through the points (-3, -9)(−3,−9) and (22, -4) ?(22,−4)? Write your answer in simplest form.
Answer:
1/5
Step-by-step explanation:
Equation: [tex]\frac{y_{2} - y_{1}}{x_{2} - x_{1}}[/tex]
Points: (-3, -9) and (22, -4)
[tex]y_{2}[/tex] is the second y point that shows up on the question, basically go by order. So it's -4
[tex]y_{1}[/tex] is -9, because again, in order of which coordinates pop-up first in the question
[tex]x_{2}[/tex] is 22, [tex]x_{1}[/tex] is -3
Now input into the equation, to make it easier we'll split the fraction into 2 equations:
[tex]\frac{y_{2} - y_{1}}{x_{2} - x_{1}}[/tex] = [tex]y_{2} - y_{1}[/tex] and [tex]x_{2} - x_{1}[/tex], we'll put them back in a fraction later
[tex]y_{2} - y_{1}[/tex] = -4 - (-9) = -4 + 9 = 5
[tex]x_{2} - x_{1}[/tex] = 22 - (-3) = 22 + 3 = 25
now put it in the fraction, remember y on top x on the bottom:
5/25, simplify, 1/5
Claudia spends $2.15 a day for lunch. Her cafeteria lunch account has a balance of $48.00. Which equation can be used to determine the maximum number of days, d, that she can eat without adding money to her lunch account?
Answer:
She can eat for around 22 days before her has to add money.
Based on a sample of 100 employees a 95% confidence interval is calculated for the mean age of all employees at a large firm. The interval is (34.5 years, 47.2 years).
A. What was the sample mean?
B. Find the margin of error?
C. Find the critical value tc for:
a. a 90% confidence level when the sample size is 22.
b. an 80% confidence level when the sample size is 49.
Answer:
a
[tex]\= x = 40.85[/tex]
b
[tex]E = 5.85[/tex]
Ca
[tex]t_c = 2.08 [/tex]
Cb
[tex] t_c = 1.282 [/tex]
Explanation:
From the question we are told that
The sample size is n = 100
The upper limit of the 95% confidence interval is b = 47.2 years
The lower limit of the 95% confidence interval is a = 34.5 years
Generally the sample mean is mathematically represented as
[tex]\= x = \frac{a + b }{2}[/tex]
=> [tex]\= x = \frac{47.2 + 34.5 }{2}[/tex]
=> [tex]\= x = 40.85[/tex]
Generally the margin of error is mathematically represented as
[tex]E = \frac{b- a }{ 2}[/tex]
=> [tex]E = \frac{47.2- 34.5 }{ 2}[/tex]
=> [tex]E = 5.85[/tex]
Considering question C a
From the question we are told the confidence level is 90% , hence the level of significance is
[tex]\alpha = (100 - 90 ) \%[/tex]
=> [tex]\alpha = 0.10[/tex]
The sample size is n = 22
Given that the sample size is not sufficient enough i.e [tex]n < 30[/tex] we will make use of the student t distribution table
Generally the degree of freedom is mathematically represented as
[tex]df = n- 1[/tex]
=> [tex]df = 22 - 1[/tex]
=> [tex]df = 21[/tex]
Generally from the student t distribution table the critical value of [tex]\frac{\alpha }{2}[/tex] at a degree of freedom of 21 is
[tex]t_c =t_{\frac{\alpha }{2} , 21 } = 2.08 [/tex]
Considering question C b
From the question we are told the confidence level is 80% , hence the level of significance is
[tex]\alpha = (100 - 80 ) \%[/tex]
=> [tex]\alpha = 0.20[/tex]
Generally from the normal distribution table the critical value of [tex]\frac{\alpha }{2}[/tex] is
[tex] t_c =Z_{\frac{\alpha }{2} } = 1.282 [/tex]
4x-2 =3x + 35 solve it
Answer:
x=37
Step-by-step explanation:
4x-2=3x+35 Add 2 to both sides.
+2 +2
4x=3x+37 Subtract 3x on both sides.
-3x -3x
x=37
I hope this helps!! Have a great day ^^
Which statement(s) most directly apply to capitalism?
1. There is heavy government regulation of industry.
II. Individuals can start some, but not all, kinds of enterprises.
III. The price and availability of goods is determined primarily by the market.
a. I and II
b. ll only
c. I and III
d. Ill only
Answer:
The answer is D, lll only.
Step-by-step explanation:
Just took the test on e d g e!
The statement that most directly applies to capitalism is III only.
Option D is the correct answer.
What is capitalism?It is a system of the economy where means of production and distribution are owned by the private, not the government.
We have,
The economic system of capitalism is characterized by private ownership of the means of production and distribution of goods and services, as well as the profit motive as the driving force behind economic activity.
Based on this definition, statement III most directly applies to capitalism, as it highlights the central role of market forces in determining prices and availability of goods.
On the other hand,
Statement I, which suggests heavy government regulation of the industry, is not a typical feature of capitalism, as it implies a more interventionist approach by the government in the economy.
Capitalism generally favors a more limited role for the government in economic affairs, although some government regulations may still be present.
Statement II, which suggests that individuals can start some, but not all, kinds of enterprises, is also not a defining characteristic of capitalism.
In a capitalist system, individuals are generally free to start any kind of enterprise that they wish, provided they can obtain the necessary resources and meet any legal or regulatory requirements.
Therefore,
The statement that most directly applies to capitalism is III only.
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1 Exam Find the sales tax. Sales Tax Selling Price Rate of Sales Tax Sales Tax $40.00 6% ? The sales tax is $
Answer:
59% why
Step-by-step explanation:
i just took the test my gee
Answer:
Tax: $2.4
Total: $42.4
Step-by-step explanation:
40*0.06 = 2.4, 40 + 2.4 = 42.4
Is Anyone wanna do this please I’ll do anything you’ll literally be my fav person ever please help
Answer:
The 2nd one 1.96x + .69 < = 3
Step-by-step explanation:
I'm in algebra so I get this.
Basically it's $1.96 per pound of potatoes and "x" represents the amount of potatoes. So essentially you're multiplying 1.96 times how many pounds of potatoes there are. Than it says they only bought 1 pack of cookies and 1 pack is $0.69 so add that to your equation. And we know we only have $3 so that's our max, the most we can spend. So whatever $1.96 and $0.69 add up too has to be less than or equal too $3. And that's it!
If u marked me as brainliest that would be greatly appreciated :D
What is the constant of proportionality
Step-by-step explanation:
“The constant of proportionality is the ratio between two directly proportional quantities. Two quantities are directly proportional when they increase and decrease at the same rate.”
Find the distance between the points. Round to the nearest tenth.
(1, 3) and (5.0)
Evaluate 3x(x-2)/2x-1 when x=0
Answer:
The answer is zero, because the entire equation is being multiplied by zero. The only way that will give you non-zero value is if the denominator in the fraction came to zero as well, but in this case it does not.
Step-by-step explanation:
[tex]3x\frac{x - 2}{2x - 1} \\3(0)\frac{0-2}{2(0) - 1}\\0[/tex]
Which number produces a rational number when added to 0.25?
A. 0.2645751311...
B. 2
O c. 2
O D.
Algebra 1
Answer:
The number that produces a rational number when added to 0.25 is 2/9. Tell me if im wrong please
Step-by-step explanation:
The radius of a right circular cone is increasing at a rate of 1.4 in/s while its height is decreasing at a rate of 2.8 in/s. At what rate is the volume of the cone changing when the radius is 138 in. and the height is 143 in.?
Answer:
34191.7πin³/sec
Step-by-step explanation:
Volume of circular come = 1/3pi x r² x h
When we differentiate this formula we have
dv/dt = 1/3π[r²dh/dt + 2rhdr/dt]
We have the following information
r = 138
H = 143 inch
dr/dt = 1.4
dh/dt = -2.8
When we plug into the formula
1/3π[130² x -2.8 + 2x138x143x1.4]
= 34191.7πin³/sec
Convert 4/16 to a decimal.
0.1
O
0.25
0.5
0.75
Answer:
0.25
How to Solve:
Take the denominator of 4/16 and find a number to make it 10, 100, any one followed by zeroes:
16 x 6.25 = 100
Do the same to the numerator:
4 x 6.25 = 25
Now, take 25 and take a decimal point two spaces to the right:
0.25
Write the equation of a line that is parallel to y=4 and passes through the point (-2,7)
Answer:
Y= 2X+8
Step-by-step explanation:
Compare the given line with y=mx+c will give the slope of the parallel line as 2. Equation of new line in point slope form is y-y1 = m(x-x1). So y-4 = 2 (x+2) will give you Y= 2X+8
Rhoda and James both sell laptops and earn commission based on the number of laptops sold. In one month, Rhoda
earns $2000 in commission for selling 10 laptops and has a base salary of $600. The money James earns for selling
laptops in the same month is shown in the graph below.
Answer: James earns $50 more in commission than Rhoda for each laptop sold.
Step-by-step explanation:hope it helps
James earned $50 more than Rhoda.
What is Data?A collection of information obtained through measurements, study, observations, or analysis is referred to as data. Facts, numbers, names, figures, or even descriptions of things may be included. In the form of graphs, charts, or tables, data is arranged.
Basic facts and entities like names and numbers are referred to as data. Weights, costs, sales volume, employee names, product names, addresses, tax identification numbers, and registration marks are just a few types of data.
Given:
In one month, Rhoda earns $2000 in commission for selling 10 laptops.
For, one laptop = 2000/10
= 200
Now, as from the graph
In one month, James earns $2500 in commission for selling 10 laptops.
For, one laptop = 2500/10
= 250
So, James earned $50 more than Rhoda.
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BRAINLIEST TO HONEST ANSWER
In common app ,do teachers have to write letter of recommendation only once?? and I can submit it to any colleges I want??
What are characteristics of a negative correlation? Select all that apply.
please I need help show work pls
Answer: A
Step-by-step explanation:
If you write down the points you’ll get:
(2,6) & (3,9) & (5,15)
Next apply the expression which in this case:
A) y =3x
Now insert the numbers
1) (2,6) => 6=3(2)
2) (3,9) => 9=3(3)
3) (5,15) => 15=3(5)
So, A is correct.
Edit: Forgot to mention about the numbers placement.
(x,y) so numbers on the left is x while those on the right is y
Please help I’ll mark u <3
Answer:
x>-4
Step-by-step explanation:
11. The numbers 4 through 14 are placed in a bowl and drawn at random then replaced after being drawn. Is it likely or unlikely you will draw a number less than 7?
Answer:
Unlikely
Step-by-step explanation:
In a pool 4-14 you have the numbers: 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14. So there is only three numbers under 7 in this scenario.
What is the purpose of the periodic interest rate? (2 points)
a for borrowers to compare the rates between different loans
b for lenders to compare the interest rates between different investments
c to determine the amount of interest charged during a specific time frame
d to determine the minimum payment of a credit card
Answer:
The Answer is to determine the amount of interest charged during a specific time frame
Step-by-step explanation:
simplify y -2/ 3y4
help me please!
Answer:
Step-by-step explanation: