Answer:
797.42
Step-by-step explanation:
Given the Output of a linear regression data using R;
From the result table;
Intercept = 72.807562
Gradient or slope = 0.009792
General form of a linear equation:
y = mx + c
Where y = response variable ; x = explanatory variable ; c = intercept and m = gradient / slope
Hence, the regression equation becomes :
y = 0.009792x + 72.807562
Using these regression results, what is the estimated repair cost on a car that has 74,000 miles on it?
x = 74,000
y = 0.009792(74000) + 72.807562
y = 724.608 + 72.807562
y = 797.42
Answer:
The estimated repair cost on a car that has 74,000 miles on it is $797.42.
Step-by-step explanation:
The statement: Im(formula = Repair.Costs ~ Miles.Driven, data = Dataset) implies that the variable "Repair.Costs" is the dependent variable and the variable "Miles.Driven" is the independent variable.
From the provided data the regression equation formed is:
[tex]\text{Repair.Costs}=72.807562+0.009792\cdot \text{Miles.Driven}[/tex]
Compute the estimated repair cost on a car that has 74,000 miles on it as follows:
[tex]\text{Repair.Costs}=72.807562+0.009792\cdot \text{Miles.Driven}[/tex]
[tex]=72.807562+0.009792\cdot 74000\\\\=72.807562+724.608\\\\=797.415562\\\\\approx 797.42[/tex]
Thus, the estimated repair cost on a car that has 74,000 miles on it is $797.42.
Name the intersection of plane ABC and plane LOD
Answer:
segment AD
Step-by-step explanation:
LOD is the far side of the cube.
ABC is the left side.
So the intersection is the vertical EDGE AD, on the far-left.
The two planes ABC and LOD intersect each other at the segment AD.
What is the coordinate plane?A Cartesian coordinate system in a plane is a system of coordinates that uniquely identifies each point by a pair of numerical coordinates. These numerical coordinates are the signed distances from two fixed perpendicular oriented lines to the point, measured in the same unit of length.
Given that there is a cube made of six sides. The two planes ABC and LOD intersect each other at the line segment AD or AD is the common line between the two planes. LOD is the far side of the cube. ABC is on the left side. So the intersection is the vertical EDGE AD, on the far left.
Therefore, the two planes ABC and LOD intersect each other at the segment AD.
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Kingston obtained a loan for $1,000 to be paid back in 30 days. The lender quoted Kingston a $200 fee. Which of the following statements is correct regarding this loan?
Answer:
A The APR is over 240%.
Step-by-step explanation:
Given:
Loan amount = $1000Time = 30 daysRate = $200 per 30 daysNow options:
A The APR is over 240%.
Correct since $200 per 30 days ⇒ 20% per 30 days ⇒ 240$ per 360 days ⇒ more than $240 for yearB The fee will be paid only if Kingston makes a late payment.
Incorrect. This is the sum to be paid at the end of 30 daysC The $1,000 plus finance charges will be paid at the end of one year.
Incorrect. All charges including the loan due paid at the end of 30 daysD Kingston will receive $1,200 from the loan.
Incorrect. Loan amount is $1000`.Answer:
A The APR is over 240%.
Step-by-step explanation: Hope this helps ya'll
Simplify the expression -10(1 - 9x) + 6(x - 10)
Answer: 96x-70
Step-by-step explanation: -10+90x+6x-60
=96x-70
Answer:
96x -70
Step-by-step explanation:
-10(1 - 9x) + 6(x - 10)
Distribute
-10 +90x +6x - 60
Combine like terms
90x+6x - 10-60
96x -70
e^2x + sin(x+3y) - 1 = 0
x = 0 , y = 0
Dy/dx=...?
a. -1
b. 0
c. 1
Answer:
to be honest I'm not sure
Find x, if 3x − 5(y + x ) ^2 = 16 and 4x + 2(y + x )^ 2 = 30
Answer:
x is 7
Step-by-step explanation:
3x - 5(y + x)^2 = 16
3x - 16 = 5(y + x)^2
(y + x)^2 = 1/5(3x - 16) ------ eqn(I)
4x + 2(y + x)^2 = 30
2(y + x)^2 = 30 - 4x
(y + x)^2 = 1/2(30 - 4x) ------- eqn(II)
Equate eqn (I) & (II)
1/5(3x - 16) = 1/2(30 - 4x)
Multiply both sides by 10
2(3x - 16) = 5(30 - 4x)
6x - 32 = 150 - 20x
6x + 20x = 150 + 32
26x = 182
x = 182/26 = 7
Select the correct answer.
Describe the solution to the system of equations graphed below.
The system has no solutions.
The system has infinitely many solutions of the form y = -x + 3, where x is any real number.
The system has a unique solution at (2,1).
O
The system has a unique solution at (1,2).
Answer:
answer is c
Step-by-step explanation:
i got it right
The solution of the system is unique and the solution is (2, 1). Then the correct option is C.
What is the solution to the equation?The allocation of weights to the important variables that produce the calculation's optimum is referred to as a direct consequence.
A connection between a number of variables results in a linear model when a graph is displayed. The variable will have a degree of one.
If the two lines intersect, then the point of intersection represents the solution of the equations.
The solution of the system is unique and the solution is (2, 1).
The system has a unique solution at (2,1). Then the correct option is C.
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What's the height of a triangle if we know the base is 20 m and the area is 100 m2?
15 m
25 m
5 m
5 m
4) 10 m
Answer:
h = 10 m
Step-by-step explanation:
Area of a triangle = 1/2 * base * height
Area = 100 m²
base = 20 m
therefore,
100 m² = 1/2 * 20 m * h
h = 100 / 10
h = 10 m
The height will be 10 m.
What is area?Area is defined as the total space taken up by a flat (2-D) surface or shape of an object.
Given that, the area of a triangle is 100 m² and base is 20 m.
The area of a triangle = 1/2xbasexheight
100 = 1/2x20xh
h = 100/10
h = 10
Hence, The height will be 10 m.
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michaela has h hair ties. michaela's sister has triple the number of hair ties that michaela has. choose the expression that shows how many hair bows michaela's sister has
Answer:
Michaela = h
Michaela's sister = 3h
Answer = 3h
If Michaela has h hair ties and Michaela's sister has triple number of hair ties then the expression which shows the number of hair ties that Michaela's sister has is 3h.
What is expression?Expression is a combination of number, symbols, variables, coefficients, indeterminants, functions, etc. It is usually not present in equal to form.
How to form expression?We have been given that Michaela has h number of hair ties and Michaela's sister has triple the number of hair ties that Michaela has, so if h is the expression for Michaela then 3h will be the expression for Michaela's sister.
Hence the expression which shows the number of hair ties that Michaela's sister has is 3h.
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Metallic colored plastic is being injected into molds to manufacture small beads for a crafts supplier. One of these beads is comprised of attached congruent square pyramids, as shown below.
7 mm
6 mm
How much plastic is needed to make each of these beads?
A. 112mm3
b 504mm3
c. 168mm3
d84mm3
Answer:
Volume of Beads = 84 mm³
Step-by-step explanation:
Given:
Side of base = 6 mm
Height = 7 mm
Find:
Volume of Beads
Computation:
Volume of Beads = Volume of a square pyramid
Volume of Beads = [1/3][Area of base][h]
Volume of Beads = [1/3][6 x 6][7]
Volume of Beads = 84 mm³
Use point-slope form to find the equation of the line passing through (0,5) with a slope of 2/3
1. A research team wants to investigate the usefulness of relaxation training for reducing levels of anxiety in individuals experiencing stress. They identify 30 people at random from a group of 100 who have "high stress" jobs. The 30 people are divided into two groups. One group acts as the control group - they receive no training. The second group of 15 receive the relaxation training. The subjects in each group are then given an anxiety inventory. The summarized results appear below where higher scores indicate greater anxiety. Evaluate using the criteria of p < .05. Assume it is a two tailed test.
Answer:
a. H0:u1=u2
Ha:u1>u2
b. T-critical value =1.7011
c. We can conclude that relaxation training has reduced stress levels based on evidence gathered from statistical calculations
Step-by-step explanation:
Please find attachment
negative numbers are closed under addition True or False
Of the 727 cases of SI, 203 received two doses of vaccine. Of 1,239 controls, 771 received two doses of vaccine for SI. What is the likelihood of contracting SI with only one dose of vaccine
Answer:
hello your question is incomplete below is the complete question
Case-Control Calculation Enter only numeric values into the answer line. Place a leading 0 before the decimal and remember to round to two decimal places. Note your answers for the next short essay question. Swine Influenza (SI) is a growing concern at the local Broncoville Health Department in Lawrence, Kansas. You are working for a pharmaceutical company which is developing a human vaccine against SI. You are in charge of testing the vaccine’s effectiveness. You need to determine if one or two doses of vaccine is required to provide immunity. You field test and collect the following information about the vaccine status of persons who did and did not contract SI after getting either one or two doses of vaccine. Develop a 2 x 2 table with the following information: Of the 727 cases of SI, 203 received two doses of vaccine. Of 1,239 controls, 771 received two doses of vaccine for SI. What is the likelihood of contracting SI with only one dose of vaccine?
1. Calculate the incidence of persons with one dose of vaccine for SI
2. Calculate the incidence of persons with two doses of vaccine for SI
3. Calculate the odds ratio of developing SI among those with one dose of vaccine for SI
answer : 1) ≈ 0.53 , (2) ≈ 0.21, (3) ≈ 1.12
Step-by-step explanation:
cases of SI = 727
number of SI cases that received two doses of vaccine = 203
number of SI cases that received one dose of vaccine = 727 -203 = 524
controls = 1239
number of controls that received two doses of vaccine = 771
number of controls that received one dose of vaccine = 1239 - 771 = 468
I) The incidence of persons with one dose of vaccine for SI
= 524 / 992 = 0.528 ≈ 0.53
2) The incidence of persons with two doses of vaccine for SI = 203/974 = 0.208 ≈ 0.21
3) The Odds of SI in one dose group
= 524/468 = 1.119 ≈ 1.12
Find the volume of the cylinder either enter an exact answer in terms of pi or use 3.14 for pi
1/2πr^2h.
1/2×3.142×3^2×2=
1/2×56.556=28.278~ 28.
Answer:
18pi
Step-by-step explanation:
I just got it right on Khan Academy
how do i solve for this absolute value equation ? |12x - 5| = 11
Hello, we know that
[tex]|x|=\begin{cases}x &\text{if } x \geq 0\\ -x &\text{if } x < 0 \end{cases}[/tex]
And we can write that 12x-5=0 <=> 12x =5 <=> x = 5/12
So,
[tex]|12x-5|=\begin{cases}12x-5 &\text{if } x \geq \dfrac{5}{12}\\\\ -12x+5 &\text{if } x < \dfrac{5}{12}\end{cases}[/tex]
And, we can write.
[tex]|12x-5|=11<=>\begin{cases}12x-5=11 &\text{if } x \geq \dfrac{5}{12}\\\\ -12x+5=11 &\text{if } x < \dfrac{5}{12}\end{cases}\\ \\ \\ <=>\begin{cases}12x=16 &\text{if } x \geq \dfrac{5}{12}\\\\ 12x=5-11 &\text{if } x < \dfrac{5}{12}\end{cases}\\\\<=>\begin{cases}x=\dfrac{16}{12}=\boxed{\dfrac{4}{3}} &\text{if } x \geq \dfrac{5}{12}\\\\ x=\dfrac{-6}{12}=\boxed{-\dfrac{1}{2}} &\text{if } x < \dfrac{5}{12}\end{cases}[/tex]
So the two solutions are 4/3 and -1/2.
Thank you.
For i≥1 , let Xi∼G1/2 be distributed Geometrically with parameter 1/2 . Define Yn=1n−−√∑i=1n(Xi−2) Approximate P(−1≤Yn≤2) with large enough n .
Answer:
The answer is "0.68".
Step-by-step explanation:
Given value:
[tex]X_i \sim \frac{G_1}{2}[/tex]
[tex]E(X_i)=2 \\[/tex]
[tex]Var (X_i)= \frac{1- \frac{1}{2}}{(\frac{1}{2})^2}\\[/tex]
[tex]= \frac{ \frac{2-1}{2}}{\frac{1}{4}}\\\\= \frac{ \frac{1}{2}}{\frac{1}{4}}\\\\= \frac{1}{2} \times \frac{4}{1}\\\\= \frac{4}{2}\\\\=2[/tex]
Now we calculate the [tex]\bar X \sim N(2, \sqrt{\frac{2}{n}})\\[/tex]
[tex]\to \frac{\bar X - 2}{\sqrt{\frac{2}{n}}} \sim N(0, 1)\\[/tex]
[tex]\to \sum^n_{i=1} \frac{X_i - 2}{n} \times\sqrt{\frac{n}{2}}} \sim N(0, 1)\\\\\to \sum^n_{i=1} \frac{X_i - 2}{\sqrt{2n}} \sim N(0, 1)\\[/tex]
[tex]\to Z_n = \frac{1}{\sqrt{n}} \sum^n_{i=1} (X_i -2) \sim N(0, 2)\\[/tex]
[tex]\to P(-1 \leq X_n \leq 2) = P(Z_n \leq Z) -P(Z_n \leq -1) \\\\[/tex]
[tex]= 0.92 -0.24\\\\= 0.68[/tex]
What expression converts 100 inches per minute to feet per minute?
1 foot= 12 inches.
To convert you must have "2 fractions" to multiply.
Your first fraction must be 100in/1min. (100 inches per 1 minute).
The second should serve to convert inches to feet. It should be 1 foot/ 12 inches. (1 foot per 12 inches).
Your product should be 100ft/12 which equals 8.3 repeating or 25/3 (8 1/3) feet.
Which of the following statements regarding immunization are true?
I. If long-term interest rates are lower than short-term rates, the need for immunization is reduced.
II. Either Macaulay or modified duration can be used to develop an immunization strategy.
III. Both processes of matching the present values of the flows or the flows themselves will produce exact matching
A. I only
B. II only
C. III only
D. I, II and III
E. The correct answer is not given by (A), (B), (C), or (D).
Answer:
B. II only
Step-by-step explanation:
Immunisation is used to lower the risk factor that may arise due to change in interest rate . For it, cash inflow and cash outflow are matched in terms of their timing . In other words, effective duration of asset and liability are matched with the help of methods like cash flow matching , duration matching etc.
Even lowering of interest rate in long term may entail risk because it may increase the bond price which may affect the business adversely in some way if bond is kept as liability . It may reduce the price of asset if it is held as asset .
Exact matching is possible only when matching of cash flow is achieved along with its timing . Matching of present value will not serve the purpose .
Macaulay or modified duration can be used to develop an immunization strategy . Both of them calculate the duration of asset and liability with some change in the method of calculation.
A company buys a machine for $225,000 that depreciates at a rate of 30% per year. Find a formula for the value of the machine after n years. V(n) =
Answer:
[tex]V(n) =225000*0.7^n[/tex]
Step-by-step explanation:
In this problem we are expected to model the depreciated value of the machine after some years of purchase (n years)
initial value of the machine is $225,000
after a year it reduces by 30%
Therefore the new value is now 70% of the initial value
[tex]= 225000*0.7= 157,500[/tex]
= $157,500
After another year it reduces by 30%
Hence the new value is
[tex]=225000*0.7^2\\\=225000*0.49\\\\\=110250[/tex]
= $110250
that after n years the value will be
[tex]V(n) =225000*0.7^n[/tex]
Describe the transformations from the graph of f(x)=∣x∣ to the graph of r(x)=∣x+2∣− 6.
The transformations are a horizontal translation 2 units right then a vertical translation 6 units down.
The transformations are a horizontal translation 2 units right then a vertical translation 6 units up.
The transformations are a horizontal translation 2 units left then a vertical translation 6 units down.
The transformations are a horizontal translation 2 units left then a vertical translation 6 units up.
Answer: The answer is C
The transformations are a horizontal translation 2 units left then a vertical translation 6 units down.
write a equation in a point-slope form fir the line through the given point with the given slope (9,-1);m=4/3
Answer:
y +1 = 4/3( x-9)
Step-by-step explanation:
Point slope form of an equation is
y-y1 = m(x-x1)
where m is the slope and (x1,y1) is a point on a line
y - -1 = 4/3( x-9)
y +1 = 4/3( x-9)
A bicycle has a listed price of $871.95 before tax. If the sales tax rate is 6.25%, find the total cost of the bicycle with sales tax included. Round your answer to the nearest cent, as necessary.
Answer:
$926.45
Step-by-step explanation:
$871.95 x .0625 = $54.50
$871.95 + $54.50 = $926.45
Answer:
$926.44
Step-by-step explanation:
sales tax = price*sales tax rate
sales tax = $54.49
871.95+54.49 = answer I think
Find the area of a triangle whose vertices are P(1,3,2) Q(2,-1, 1) R(-1,2,3)
Answer:
5199
Step-by-step explanation:
Because
Subtract.
Eight-ninths minus one-third
8/9 - 1/3
To subtract these two fractions, first find a common denominator.
The common denominator will be the
least common multiple for the two denominators.
In this case, the least common multiple of 9 and 3 is 9.
So to subtract, a denominator of 9 is needed in each fraction.
8/9 already has 9 in the denominator so it stays the same.
To get a 9 in the denominator of 1/3, multiply top and bottom by 3.
This gives us 3/9.
So we have 8/9 - 3/9 which is 5/9.
Answer:
Five-ninths
Step-by-step explanation:
Since the denominators are different (9 and 3) we need to change one of them.
9 is divisible by 3 therefor we do not need to change Eight-ninths.
3 times 3 = 9, nine becomes the new denominator, but remember, whatever we do to the bottom (denominator), we must also do to the top (numerator).
1 times 3 = 3
Now the equation is 8/9 - 3/9, we must only subtract the numerators. The answer is 5/9.
Solve N=2rt^2-7rx for x
Answer:
N - 2 r t²
x = - ------------
7x
Step-by-step explanation:
N = 2 r t² - 7 r x
solve for x
N = 2 r t² - 7 r x
N + (-2 r t²) = (2 r t² - 7 r x) + (-2 r t²)
N - 2 r t² = 2 r t² - 7 r x - 2 r t²
N - 2 r t² - 2 r t² + 2 r t² = - 7 r x
N - 2 r t² = 7 r x
therefore,
N - 2 r t²
x = - ------------
7x
On a tree farm, a forester wants to estimate the total number of trees with diameters exceeding 12 inches. A map of the farm is available. Discuss the problem of choosing appropriate sampling units and an appropriate frame.
Answer:
The problems associated with choosing appropriate sampling units and frame are given below;
Step-by-step explanation:
1. The only aid available to the forester or researcher is a map of the farm.
2. Appropriate sampling units will be hard to choose because farm trees are only characterized by attributes such as
- type of crop/plant (as all trees of a certain crop are much likely to have similar width or diameter)
- height of tree (as height is closely related to width)
- location of tree on the farm (e.g. North on the map, East on the map, South on the map, West on the map)
- age of tree (as older trees are more likely to have diameters exceeding 12 inches, than the younger trees)
- etcetera.
3. Appropriate frame (size) of sample will be hard to choose because a number of trees cannot just be selected from the total number of trees, if the categorization for sampling units is uncertain.
What is the slope of the line?
A. −1/2
B. 2
C. −2
D. 1/2
Answer:
[tex]\frac{2}{1}[/tex]
Step-by-step explanation:
Hello!
To find the slope of a line we divide how many times it goes over by the number of times it goes up
The line goes over 4 and up 2 which is shown like
[tex]\frac{4}{2}[/tex]
We can simplify this
[tex]\frac{2}{1}[/tex]
The answer is [tex]\frac{2}{1}[/tex]
Hope this helps!
1. Graph: y = 3x
please help
Answer:
[see below]
Step-by-step explanation:
Find two points that would satisfy the equation.
When x = 1:
[tex]y=3(1)\\\\y=3[/tex]
One point would be (1, 3).
When x = 2:
[tex]y=3(2)\\\\y=6[/tex]
Another point would be (2, 6).
Graph the points (1,3) and (2,6) and draw a line crossing through them.
Hope this helps.
Alec makes jam to sell at a local farmers' market. To make last week's batch, he used 2 cups of sugar and 18 cups of berries. It was so popular that he made a larger batch this week. To make this week's batch, Alec used 4 cups of sugar and 30 cups of berries, and the jam sold out even faster. Which batch had a greater ratio of sugar to berries?
Answer:
This week's batch had the greater ratio of sugar to berries
Step-by-step explanation:
Last week's ratio was 2:18
This week's ratio was 4:30
Now, we can simplify both of these:
Divide last week's by 2:
1:9
Divide this week's by 2:
2:15
1:9 is equivalent to 0.11, and 2:15 is equivalent to 0.13
So, this week's batch had the greater ratio of sugar to berries
The batch with 4 cups of sugar and 30 cups of berries has a greater ratio of sugar to berries and is given by the proportion B = 4/30 = 0.1333
What is Proportion?The proportion formula is used to depict if two ratios or fractions are equal. The proportion formula can be given as a: b::c : d = a/b = c/d where a and d are the extreme terms and b and c are the mean terms.
The proportional equation is given as y ∝ x
And , y = kx where k is the proportionality constant
It demonstrates the equality of the relationship between the expressions printed on the left and right sides.
Given data ,
Let the proportion equation be represented as A and B
Now , for the last week's batch
Alec used 2 cups of sugar and 18 cups of berries
So , the ratio of sugar to berries is 2 : 18
The proportion is 2 / 18 = 0.1111
Now , for this week's batch
Alec used 4 cups of sugar and 30 cups of berries
So , the ratio of sugar to berries is 4 : 30
So , the proportion is 4 / 30 = 0.1333
Now , the proportion of 4 : 30 is greater than 2 : 18
Hence , this week's batch had a greater proportion
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Plz help 7th grade math ASAP