Answers
Answer:
Step-by-step explanation:
refreh it
Related Questions
In the command window in MATLAB generate a random 6 x 6 matrix with integer entries using the command G = round(10* rand(6)) For each of the following questions below, execute the given commands and match the result with the best explanation of how MATLAB got the answer (some explanations will not match). G(:,:) G(:) G(7,6) ✓ [Choose ] maximum entry in each column of G reshapes all elements of G into a single column vector assigns the value 4 to all entries of G that are greater than 4 reshapes the matrix G into a single row vector returns the matrix G in its original form maximum entry in each row of G returns an indexing error entries of G that are greater than 4 sum of the entries in each column of G sum of the entries in each row max(G) sum(G) [ Choose ] G(G>4) [Choose ] G(G>4)=4 [Choose]
Answers
G(:,:) returns the matrix G in its original form. This command takes all elements of G and reshapes them into a single row vector. This means that all elements of G are included in the output, and the output is in the same shape as the original matrix.
G(:) reshapes all elements of G into a single column vector. This command takes all elements of G and places them into a single column. This means that all elements of G are included in the output, and the output is in a column vector.
G(7,6) returns an indexing error. This command attempts to access an element outside of the range of the matrix G. Since G is a 6 x 6 matrix, there is no element at the index (7,6).
max(G) returns the maximum entry in each column of G. This command takes the maximum value from each column and returns them as a single row vector. This means that the output contains the maximum value from each column and the output is in a single row vector.
sum(G) returns the sum of the entries in each column of G. This command takes the sum of all entries in each column and returns them as a single row.
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What is the equation of the line that passes through the point (3, -7) and has a slope of
−4/3?
Answers
[tex](\stackrel{x_1}{3}~,~\stackrel{y_1}{-7})\hspace{10em} \stackrel{slope}{m} ~=~ - \cfrac{4}{3} \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{(-7)}=\stackrel{m}{- \cfrac{4}{3}}(x-\stackrel{x_1}{3}) \implies y +7= -\cfrac{4}{3} (x -3) \\\\\\ y+7=-\cfrac{4}{3}x+4\implies {\Large \begin{array}{llll} y=-\cfrac{4}{3}x-3 \end{array}}[/tex]
The sum of two numbers is twenty-five. Using x to represent the smaller of the two numbers, translate "the difference between four more than the larger number and twice the smaller number" into a variable expression. Then simplify.
Answers
Answer:
If the sum of the two numbers is 25, we can represent the larger number as x + (smaller number)
The difference between four more than the larger number and twice the smaller number is:
(x + 4) - 2(x) = x + 4 - 2x = -x + 4
Now we can simplify the expression:
-x + 4
That is the variable expression for the difference between four more than the larger number and twice the smaller number.
Step-by-step explanation:
Consider the expression given below. Simplify this expression into the form A/B and place the appropriate expressions into the boxes shown below: V4219 Answer: 4x19 = AB, where A= 2x9 âand B = 4.19 Ð¥
Answers
the simplified expression is 2x9/4.19, which can be written as A/B, where A = 2x9 and B = 4.19. Therefore, the value of A is 18 and the value of B is 4.
To simplify the expression V4219, first divide it into two separate terms by breaking the number 4219 into 4 and 2119.
Now, we need to simplify the terms 4 and 2119 separately.
To simplify the term 4, we need to divide it by 4, which gives us 1.
To simplify the term 2119, we need to divide it by 19, which gives us 2x9.
Hence, the simplified expression is 2x9/4.19, which can be written as A/B, where A = 2x9 and B = 4.19. Therefore, the value of A is 18 and the value of B is 4.
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This is a 2-page document! **
Include a congruency statement for all congruent triangles.
State whether the triangles could be proven congruent, if possible, by SSS or SAS.
1. W
M
3.
5.
U
1.
2.
3.
4.
5.
1.
2.
3.
4.
Statements
8. Given: PO SR, ZPORZSRQ
Prove: APOR ASRO
2.
4.
Statements
6.
7. Given: AMCP, CM GP, C is the midpoint of AG
Prove: AACM ACGP
W
Complete the proofs below using the most appropriate method, SSS or SAS.
X
4
M
1.
2.
B
3.
5.
N
1.
2.
3.
SSS & SAS
4.
P
A
Reasons
P
G
R
Reasons
M
P
S
Gina Wilson (All Things Algebra. L
Answers
The following congruence theorems can be applied to every triangle in the provided pair:
1) SSS
2) SAS
3)SAS
4) SSS
5) SAS
6) SAS
How to find the Calculation?1) We can observe from the that;
FY ≅ CW
FP ≅ CM
YP ≅ MW
This proves the Side-Side-Side (SSS) congruency theorem, which states that the three corresponding sides of the two triangles are congruent.
2) We can observe from the picture that;
CBD and BCA are congruent because they both have alternate interior angles. Thus;
CBD and BCA
We can also see that
EB ≅ EC
DB ≅ CA
Inferring from the fact that two corresponding sides and an angle of the two triangles are congruent
Using the Side-Angle-Side (SAS) congruency theorem, construct BED and AEC.
3) The image demonstrates that;
SVU and SVT
The shared sides provide using the reflexive property;
SV ≅ SV
VT ≅ VU
Inferring from the fact that two corresponding sides and an angle of the two triangles are congruent
Side-Angle-Side (SAS) congruency theory is used by VSU and VST.
4) The picture shows what;
MN ≅ QP
MQ ≅ NP
The shared sides provide using the reflexive property;
NQ ≅ NQ
This implies that the three corresponding sides of the two triangles are congruent, which, according to the Side-Side-Side (SSS) congruency theorem, means that QNM QNP.
5) The image demonstrates that;
GL ≅ HL
GJ ≅ HK
JLG and HLK are incongruent angles in the vertical direction;
JLG and HLK
Inferring from the fact that two corresponding sides and an angle of the two triangles are congruent
employing the Side-Angle-Side (SAS) congruency theorem, QNM and QNP.
6) From the triangles provided, we note that;
XZY and XZW (They both form a straight angle of 90 degrees.)
The shared side is congruent to itself using reflexive property, therefore;
XZ ≅ XZ
Also;
ZW ≅ ZY
Inferring from the fact that two corresponding sides and an angle of the two triangles are congruent
Using the Side-Angle-Side (SAS) congruency theorem, XYZ = XWZ.
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Complete question:
Please answer this question quickly for me
Answers
The reversal of the statement would give the converse statement and this is done in option A.
What is a converse statement?We know that in logic a statement would need to have a premise and a conclusion. The premise is what would naturally lead to the conclusion. The statement is true when the premise does lead to the conclusion.
We know that the converse of a statement can be said to be obtained when we switch the positions of the premise and the conclusion in the statement. The conclusion becomes the premise and the premise becomes the conclusion.
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TRUE OR FALSE a survey of high school students was conducted to see if students who take advanced classes are offered more scholarship money than students who do not take advanced classes.
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True, a survey of high school students was conducted to see if students who take advanced classes are offered more scholarship money than students who do not take advanced classes.
Science is used in statistics to gather and arrange data into patterns or trends. A statistical research collects data about a population or group of people and attempts to generalize the findings for use by different people.
The observational study is one type of statistical study. These studies frequently occur early in a given area of health study since they may swiftly and affordably gather a lot of general information about a community.
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The table represents the number of pairs of shoes bought when customers bought a dress from Famous Formalwear,
Which value represents the correlation coefficient of this data set?
O 0.18
O 0.32
O 0.43
O 0.99
Number of dresses purchased
1
4
3
1
4
6
2
6
2
Number of Pairs of Shoes Purchased
2
3
3
1
2
2
1
2
1
Answers
The correlation coefficient for this data-set is given as follows:
r = 0.43.
How to obtain the correlation coefficient for the data-set?The coefficient is obtained inserting the points in a data-set in a correlation coefficient calculator.
The points for the data-set in this problem are given as follows:
(1,2), (4,3), (3,4), (1,1), (4,2), (6,2), (2,1), (6,2), (2,1).
Inserting these points into a correlation coefficient calculator, the correlation coefficient for this data-set is given as follows:
r = 0.43.
Meaning that the correct option is given by the third option.
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A company mix concrete brick shaped like rectangular prism is birth is 10 inches long 9 inches wide and 4 inches tall if they used 18,000 in 3 (the tree is to the power of / tiny three) of concrete how many breaks do they make?
Answers
50 breaks do they make.
What is equation?An equation is a mathematical statement that shows the relationship between two values, or variables. It is formed by using an equal sign between two expressions that have the same value. Equations are used to solve for unknown values, or to describe a relationship between two or more variables. Equations can be used to solve for a single variable or multiple variables, and can be used to solve problems in both mathematics and science.
To find the answer to this question we must use the formula V = L x W x H. In this case, V = 10 x 9 x 4 = 360. We now know that there is 360 cubic inches in each brick. To find the total number of bricks that can be made from 18,000 cubic inches of concrete, we must divide 18,000 by 360. The answer is 50, which means that the company can make 50 concrete bricks from 18,000 cubic inches of concrete.
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Write an exponential function for a graph that passes through the points (2, 336) and (3, 2688). Write the function in the form y = a(b). please I need help
Answers
Answer:
y = 5.25 [tex](8)^{x}[/tex]
Step-by-step explanation:
the general form of an exponential function is
y = a [tex](b)^{x}[/tex]
to find a and b , substitute the coordinates of the given points into the equation.
using (2, 336 )
336 = a b² → (1)
using (3, 2688 )
2688 = a b³ → (2)
divide (2) by (1)
[tex]\frac{ab^3}{ab^2}[/tex] = [tex]\frac{2688}{336}[/tex] ( cancel ab on numerator/denominator of left side )
b = 8
substitute b = 8 into (1) and solve for a
336 = a × 8² = 64a ( divide both sides by 64 )
5.25 = a
then exponential function is
y = 5.25 [tex](8)^{x}[/tex]
When rounded to the thousands place, which of the numbers below round to 812,000? Select all that apply... A) 811,895 B) 812,345 C) 811,398 D) 811,501 E) 812,499
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The correct option D) 811,501, is the calculated number the numbers below, if rounded to the thousandths place, equal 812,000.
Define the term rounding off the number?Rounding Decimal Numbers:
Choose the final digit you want to keep.
If the following digit is less than 5, leave it alone (this is known as rounding down).But if the following digit is 5 or higher, increase it by 1. (this is known as rounding up).Decimal rounding:
Determine the number that will remain after we are done.
When rounding to tenths, one number is left just after decimal point.When rounding to hundredths, two integers are left after the decimal point, etc.For the stated question:
To get the number 812,000 when rounded to the thousands place,
number used is 811,501, as all other number are either larger than or smaller than 812,000.
Thus, option D) 811,501, is the calculated number the numbers below, if rounded to the thousandths place, equal 812,000.
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In which of the following expressions does the number 4 fill in the blank so that the equation is true? Select all that apply. A) ___(6 + 8) = 24 + 32 B) 9(3 + ___) = 27 + 36 C) ___(7 + 6) = 35 + 30 D) 2(2 + 9) = ___ + 18
Answers
: Pretty Sure u need the question to number 4-
Step-by-step explanation:
A fashion store is planning its end–of–season sale. It sells 40 of its signature jeans every week at $175 per pair. Last year, the store's sales increased to 60 pairs per week when the price was dropped by $25. By what amount should the store discount the price this year to maximize its revenue?
A. $112.50
B. $103.50
C. $62.50
D. $71.50
Answers
Answer:
A
Step-by-step Explanation:
Every $1 decrease in price corresponds to a 0.8 increase in the number of pairs of jeans sold.
So, if [tex]x[/tex] pairs of jeans are sold, the revenue in dollars is [tex](175-x)(40+0.8x)[/tex].
The roots of this function are [tex]x=175[/tex] and [tex]x=-50[/tex]. The maximum is achieved halfway between these roots at [tex]x=62.5[/tex].
When 62.5 pairs of jeans are sold, the price is $112.50.
The store should discount the price to $112.50 to maximize its revenue
What is Discount?Discount is a deduction from the usual cost of something, typically given for prompt or advance payment or to a special category of buyers.
From the above question, every $1 decrease in price corresponds to a 0.8 increase in the number of pairs of jeans sold.
So, if pairs of jeans are sold, the revenue in dollars is (175 - x)(40 + 0.8x)
The roots of this function are x = 175 and x = -50. The maximum is achieved halfway between these roots at x = 62.50.
Therefore, When 62.5 pairs of jeans are sold, the price is $112.50.
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let a and be positive integers satisfying (ab+1)/(a+b) < 3/2. The maximum possible value of (a^3b^3+1)/(a^3+b^3) is p/q. where p and q are relatively prime positive integers. Find p+q.
Answers
p/q = (2x^3+1)/2x^3, which implies that p = 2x^3+1 and q = 2x^3. p + q = 2x^3+1 + 2x^3 = 3x^3.
Let a and b be positive integers satisfying (ab+1)/(a+b) < 3/2. The maximum possible value of (a^3b^3+1)/(a^3+b^3) is given by the equation p/q, where p and q are relatively prime positive integers. We can expand the numerator and denominator as follows: a^3b^3+1 = a^3b^3 + a^3 + b^3 and a^3+b^3 = a^3 + a^2b + ab^2 + b^3. Therefore, the expression is equal to (a^2b^2+a^2+ab+1)/(a^2b+ab^2+1). Since (ab+1)/(a+b) < 3/2, we have (ab+1)/(a+b) < 5/3 and (a^2b^2+a^2+ab+1)/(a^2b+ab^2+1) < 5/3.To find the sum of p and q, we can use the fact that the maximum value occurs when a and b are equal. Thus, setting a = b = x, we have (x^3x^3+1)/(x^3+x^3) = (x^6+1)/2x^3 = (2x^3+1)/2x^3. Thus, p/q = (2x^3+1)/2x^3, which implies that p = 2x^3+1 and q = 2x^3. Therefore, p + q = 2x^3+1 + 2x^3 = 3x^3.
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Write an expression for "5 decreased by 2.
Answers
Answer:
5 (less than sign) 2
Step-by-step explanation:
Answer:
5n-20
Step-by-step explanation:
Product means multiply and so the product of 5 and n is 5n. To decrease this value by 20 , means to subtract 20 from it hence: 5n - 20 is algebraic expression for the statement
if we apply an alpha level of .05, and there really is no effect of the experimental manipulation, then one should make a type i error .
Answers
Answer:
6 votes
Step-by-step explanation:
if you were in a spaceship accelerating at 1g how long would it take you to reach the speed of light
Answers
To reach the speed of light, the spaceship will take 3.1 × 10⁷ seconds. The result is obtained by using the formula for acceleration.
What is acceleration?Acceleration is the rate of change in velocity of an object with respect to time. It can be expressed as
[tex]a = \frac{\Delta v}{\Delta t}[/tex]
Where
a = accelerationΔv = change in velocityΔt = change in timeIf we were in a spaceship with an acceleration of g, determine the time we reach the speed of light!
We have
Acceleration, a = 1g = 9.8 m/s²Speed of light, c = 3 × 10⁸ m/sTo find the time so that we can reach the speed of light, we use the formula for acceleration.
[tex]a = \frac{\Delta v}{\Delta t}[/tex]
[tex]g = \frac{c - 0}{\Delta t}[/tex]
[tex]9.8 = \frac{3 \times 10^{8}}{\Delta t}[/tex]
[tex]\Delta t = \frac{3 \times 10^{8}}{9.8}[/tex]
Δt = 0.306 × 10⁸
Δt = 3.1 × 10⁷ s
Hence, the spaceship will take 3.1 × 10⁷ seconds to reach the speed of light.
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The Colossus Ferris wheel debuted at the 1984 New Orleans World's Fair. The ride is 180 ft tall, and passengers board the ride at an initial height of 15 ft above the ground. The height above ground, h, of a passenger on the ride is a periodic function of time, t. The graph displays the height above ground of the last passenger to board over the course of the 15 min.
Sine function model: h=-82.5 cos 3pi(t)+97.5 where h is the height of the passenger above the ground measured in feet and t is the time of operation of the ride in minutes
Answers
If the Colossus Ferris wheel debuted at the 1984 New Orleans World's Fair and the ride is 180 ft tall, and passengers board the ride at an initial height of 15 ft above the ground. The period of the sine function model is: 2/3 minutes.
How to find the period of the sine function model?Given equation:
h=-82.5 cos 3pi(t)+97.5
Where:
h= height of the passenger above the ground measured in feet
t = time of operation of the ride in minutes
So,
h=-82.5× cos [2 × π ×t /T) +97.5
2 ×π / T = 3 × π
T = 2/3 minutes
Therefore the period of the sine function model is: 2/3 minutes.
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please help will mark BRAINLIEST thank you
Answers
Answer: <3, 1>
Step-by-step explanation: A translation of a vector is simply moving it a certain distance in a certain direction. In this case, the first translation of <6, -4> moves the vector 6 units to the right and 4 units down. The second translation of <-3, -5> then moves the vector an additional 3 units left and 5 units down. The net result of these two translations is to move the vector 3 units to the right and 1 unit up, which is equivalent to a single translation of <3, 1>.
Mario wants to mail three books with the following
weights:5/8 pound,7/16 pound, and 3/4
pound. Can Mario
mail the books in a box that can hold up to 2 1/2 pounds?
Use benchmarks to justify your answer.
Answers
Mario can mail the books in the box, as the weight of the books is less than the weight of the box.
How to obtain the total weight?The total weight is obtained applying proportions, converting the fractions to decimal, dividing the numerator by the denominator.
The weights of each book are given as follows:
5/8 pounds = 0.625 pounds.7/16 pounds = 0.4375 pounds.3/4 pounds = 0.75 pounds.Hence the total weight for the books is given as follows:
0.625 + 0.4375 + 0.75 = 1.8125 pounds.
The weight of the box is given as follows:
2 + 0.5 = 2.5 pounds.
Hence Mario can mail the books in the box, as the weight of the books is less than the weight of the box.
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segment from ( − 8 , 10 )to ( − 8 , − 5 )that partitions the segment into a ratio of 2 to 1?
Answers
The coordinate of the point that partitions the given line in the ratio 2:1 is; (-8, 0)
How to partition line segments?If the coordinates are given as;
P (x₁ , y₁) and Q (x₂ , y₂) and the partition of the line segment is divided internally in the ratio m : n, then its coordinate ( x, y) given by :
( x ,y ) = [(mx₂ + nx₁)/ ( m + n), (my₂ + ny₁)/ ( m + n)]
We are given the coordinates as ( − 8 , 10 )to ( − 8 , − 5 ) and if it is partitioned in the ratio 2: 1, the coordinates of the points of partition are;
(x, y) = [(2(-8) + 1(-8))/ (2 + 1), (2(-5) + 1(10))/ (2 + 1)]
(x, y) = (-24/3), (0/3)
(x, y) = (-8, 0)
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Which ordered pairs are solutions to the equation X+2y=8?
Answers
Answer:
To find the ordered pairs that are solutions to the equation X+2y=8, we need to isolate the variable y on one side of the equation.
We can start by subtracting X from both sides:
X+2y = 8
X+2y-X = 8-X
2y = 8-X
Now we can divide both sides by 2:
y = (8-X)/2
So the ordered pairs (X, y) that are solutions to the equation X+2y=8 are the ones that satisfy the equation y = (8-X)/2.
We can substitute any value of x into the equation and find the corresponding y value.
For example, if we take X= 4, we can find the corresponding y value:
y = (8-4)/2 = 4/2 = 2.
so (4,2) is a solution to the equation X+2y=8.
We can also plot the equation on a Cartesian plane and find the points where the equation is true, those are the solutions.
Alternatively, we can solve the equation for X and find the solutions for y.
X = 8-2y
So the ordered pairs (X, y) that are solutions to the equation X+2y=8 are the ones that satisfy the equation X = 8-2y
We can substitute any value of y into the equation and find the corresponding X value.
For example, if we take y= 2, we can find the corresponding X value:
X = 8-2(2) = 8-4 = 4.
so (4,2) is a solution to the equation X+2y=8.
In this case, any value of X and y that satisfies the equations y = (8-X)/2 or X = 8-2y are solutions to the equation X+2y=8
Which represents the reflection of f(x) = StartRoot x EndRoot over the y-axis?
Answers
Answer:
I tink D?
Step-by-step explanation:
The function after the reflection over y-axis is f' ( x ) = √( -x )
What is Reflection?Reflection is a type of transformation that flips a shape along a line of reflection, also known as a mirror line, such that each point is at the same distance from the mirror line as its mirrored point. The line of reflection is the line that a figure is reflected over. If a point is on the line of reflection then the image is the same as the pre-image. Images are always congruent to pre-images.
The reflection of point (x, y) across the x-axis is (x, -y). When you reflect a point across the y-axis, the y-coordinate remains the same, but the x-coordinate is taken to be the additive inverse. The reflection of point (x, y) across the y-axis is (-x, y).
Given data ,
Let the function be represented as f ( x )
Now , the value of f ( x ) is
f ( x ) = √x
Now , when you reflect a point across the y-axis, the y-coordinate remains the same, but the x-coordinate is taken to be the additive inverse. The reflection of point (x, y) across the y-axis is (-x, y)
So , the reflected function is f' ( x ) = √( -x ) and the graph is plotted
Hence , the reflected function is f' ( x ) = √( -x )
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(50 points and brainlyest)
Because the diameter of the circle is now known 19.8, the base area of the cylinder can be calculated. Ignore the square base of the prism.
Answers
Answer:
307,8
Step-by-step explanation:
The area of a circle is 3.14 times the radius squared, and the radius is the diameter divided by 2. Hence the area is 307.8
how might the additional integration techniques learned in chapter 6 sections 6.1-6.2 be useful to you in the real world? briefly state.
Answers
Integration techniques from chapter 6, such as the power rule, substitution rule, and integration by parts, can be used to solve real-world problems involving calculus.
For example, the power rule can be used to calculate the area of an object by integrating its equation. The substitution rule can be used to calculate the volume of a solid by substituting the equation of its surface. Finally, integration by parts can be used to calculate the arc length of a function given its equation. All these techniques provide a way to calculate the area, volume, and arc length of various objects given their equations, allowing us to apply calculus to real-world situations. Integration techniques from chapter 6, such as the power rule, substitution rule, and integration by parts, can be used to solve real-world problems involving calculus.
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the relationship between the magnitude of the restoring force f and the resultant displacement x from equilibrium for a nonlinear spring is given by the equation f
Answers
The work done by stretching the spring to the given distance is:
[tex]W=\frac{kx_{0} }{3}[/tex]
The given parameters:
Applied force on the spring = F
Extension of the spring, = x₀
The work done by stretching the spring to the given distance is calculated as follows:
[tex]W=\int\limits^b_a {F} \, dx[/tex]
Where:
F - Force.
W- Work.
x- Distance.
If we know that F=k.x², then the work of the nonlinear spring is:
[tex]W=\int\limits^b_a {F} \, dx \\W=\int\limits^b_a {kx^2} \, dx \\W=k\int\limits^b_a {x^2} \, dx \\\\W=k[\frac{x^3}{3}]\\\\W=k[\frac{x_b-x_a}{3} ]\\\\W=k[\frac{x_o-0}{3} ][/tex]
W=kx₀/3
Thus, the work done by stretching the spring to the given distance is: W=kx₀/3
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sale of eggs that are contaminated with salmonella can cause food poisoning in consumers. a large egg producer takes an srs of 200 eggs from all the eggs shipped in one day. the laboratory reports that 9 of these eggs had salmonella contamination. unknown to the producer, 0.1% (one-tenth of 1%) of all eggs shipped had salmonella. identify the population, the parameter, the sample, and the statistic.
Answers
The simple random sample of 200 eggs
Statistic=Proportion of eggs in the sample that contain salmonella.
p = 0.045
The population is the individuals that are being studied.
population=All eggs in one day
A sample is the part of the population of which information was actually collected.
Sample=The simple random sample of 200 eggs
A parameter is a descriptive measure for a population.
Parameter=Proportion of eggs shipped that day that contain salmonella.
p = 0.1 % =0.001
A statistic is a descriptive measure for a sample.
STATISTIC=Proportion of eggs in the sample that contain salmonella.
p=9÷200 = 0.045
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Joe's Coffee Shop makes a blend that is a mixture of two types of coffee type a coffee cost Joe $4.65 per pound and type B coffee cost $5.95 per pound this month Joe made $150 of the blend for a total cost of $89.30 how many pounds of type B coffee did he use
Answers
Using simultaneous equations, the number of pounds of Type B coffee that Joe used for the blend was 94 pounds.
What are simultaneous equations?Simultaneous equations are two or more equations solved concurrently or simultaneously.
Simultaneous equations are also known as a system of equations.
Cost per pound of Type A coffee blend = $4.65
Cost per pound of Type B coffee blend = $5.95
The total pounds of the blend made for the month = 150 pounds
The total cost of 150 pounds = $819.70
Let the number of Type A coffee pounds = a and Type B coffee pounds = b.
Equations:4.65a + 5.95b = 819.7 ... Equation 1
a + b = 150 ... Equation 2
Multiply Equation 2 by 5.95:
5.95a + 5.95b = 892.5 ... Equation 3
Subtract Equation 1 from Equation 3:
5.95a + 5.95b = 892.5
-
4.65a + 5.95b = 819.7
1.3a = 72.8
a = 56 pounds
b = 150 - a
= 150 - 56
= 94 pounds
Thus, we can conclude that Joe's Coffee Shop used 94 pounds of Type B coffee this month.
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Question Completion:This month Joe made 150 pounds of the blend for a total cost of $819.70 how many pounds of type B coffee did he use?
shawna reads a scatterplot that displays the relationship between the number of cars owned per household and the average number of citizens who have health insurance in neighborhoods across the country. the plot shows a strong positive correlation. shawna recalls that correlation does not imply causation. in this example, shawna sees that increasing the number of cars per household would not cause members of her community to purchase health insurance. identify the lurking variable that is causing an increase in both the number of cars owned and the average number of citizens with health insurance.
Answers
The average income per household that is causing an increase in both the number of cars owned and the average number of citizens with health insurance.
The correlation of variables is the statistical relationship between two variables.
A correlation is positive if both variables move in the same direction and negative if the variables move in different directions - as one variable increases, the other decreases.
Correlation does not imply causation: This means that one can not legitimately associate a cause-and-effect relationship between the two variables.
In this example, it cannot be legitimately shown that increasing the number of cars per household would cause members of the community members to purchase health insurance, but when we bring in the lurking variable.
which is the increase in average income per household, we can see that this possibility might cause more people to buy more health insurance even after they have purchased cars, because they have more money to spend.
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If 28% of 581 people replied newton ate the apple what’s the margin of error %
Answers
The margin of error, given the percentage who replied that Newton ate the apple, is 3.5%.
How to find margin of error ?The margin of error is a measure of how much the sample results are likely to vary from the true population value.
To calculate the margin of error, you need to know the sample size, the proportion of the sample that gave a particular response, and the level of confidence.
The formula for the margin of error is:
Margin of Error = z x √(p x ( 1 - p) / n)
where:
z = the critical value from the standard normal distribution table
p = the proportion of the sample that gave a particular response
n = the sample size
The margin of error for Newton eating the apple is therefore:
Margin of Error = 1.96 x √(0.28 x (1 - 0.28) / 581)
Margin of Error = 1.96 * √(0.00035)
Margin of Error = 1.96 * 0.018
Margin of Error = 0.035
The margin of error is therefore 3.5%.
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