A coffee supply store waits until the orders for its special coffee blend reach 100 pounds before making up a batch. coffee selling for $11.85 a pound is blended with coffee selling for $2.85 a pound to make a product that sells for $5.55 a pound. how much of each type of coffee should be used to make the blend that will fill the orders?

Answers

Answer 1

The coffee supply store should use 30 pounds of coffee selling for $11.85 per pound and 70 pounds of coffee selling for $2.85 per pound.

Let's assume x represents the amount of coffee at $11.85 per pound to be used, and y represents the amount of coffee at $2.85 per pound to be used.

We have two equations based on the given information:

The total weight equation: x + y = 100 (pounds)

The cost per pound equation: (11.85x + 2.85y) / (x + y) = 5.55

To solve this system of equations, we can rearrange the first equation to express x in terms of y, which gives us x = 100 - y. We substitute this value of x into the second equation:

(11.85(100 - y) + 2.85y) / (100) = 5.55

Simplifying further:

1185 - 11.85y + 2.85y = 555

Combine like terms:

-9y = 555 - 1185

-9y = -630

Divide both sides by -9:

y = -630 / -9

y = 70

Now, substitute the value of y back into the first equation to find x:

x + 70 = 100

x = 100 - 70

x = 30

Therefore, to make a batch that fills the orders, the coffee supply store should use 30 pounds of coffee selling for $11.85 per pound and 70 pounds of coffee selling for $2.85 per pound.

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Related Questions

Figure 10.5
Coverage
garage and other structures
loss of use
personal property
percent coverage
10%
20%
50%
Replacement value: $270,000; Coverage: 80%
Problem:
a. Amount of insurance on the home
b. Amount of coverage for the garage
c. Amount of coverage for the loss of use
d. Amount of coverage for personal property
Answers:

Answers

The amount of Insurance on the home as $216,000, but the amounts of coverage for the garage, loss of use, and personal property cannot be determined without additional information.

To calculate the amounts of coverage for the different components, we need to use the given replacement value and coverage percentages.

a. Amount of insurance on the home:

The amount of insurance on the home can be calculated by multiplying the replacement value by the coverage percentage for the home. In this case, the coverage percentage is 80%.

Amount of insurance on the home = Replacement value * Coverage percentage

Amount of insurance on the home = $270,000 * 80% = $216,000

b. Amount of coverage for the garage:

The amount of coverage for the garage can be calculated in a similar manner. We need to use the replacement value of the garage and the coverage percentage for the garage.

Amount of coverage for the garage = Replacement value of the garage * Coverage percentage for the garage

Since the replacement value of the garage is not given, we cannot determine the exact amount of coverage for the garage with the information provided.

c. Amount of coverage for the loss of use:

The amount of coverage for the loss of use is usually a percentage of the insurance on the home. Since the insurance on the home is $216,000, we can calculate the amount of coverage for the loss of use by multiplying this amount by the coverage percentage for loss of use. However, the percentage for loss of use is not given, so we cannot determine the exact amount of coverage for loss of use with the information provided.

d. Amount of coverage for personal property:

The amount of coverage for personal property can be calculated by multiplying the insurance on the home by the coverage percentage for personal property. Since the insurance on the home is $216,000 and the coverage percentage for personal property is not given, we cannot determine the exact amount of coverage for personal property with the information provided.

the amount of insurance on the home as $216,000, but the amounts of coverage for the garage, loss of use, and personal property cannot be determined without additional information.

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Suppose that in a particular sample, the mean is 50 and the standard deviation is 10. What is the z score associated with a raw score of 68?

Answers

The z-score associated with a raw score of 68 is 1.8.

Given mean = 50 and standard deviation = 10.

Z-score is also known as standard score gives us an idea of how far a data point is from the mean. It indicates how many standard deviations an element is from the mean. Hence, Z-Score is measured in terms of standard deviation from the mean.

The formula for calculating the z-score is given as

z = (X - μ) / σ

where X is the raw score, μ is the mean and σ is the standard deviation.

In this case, the raw score is X = 68.

Substituting the given values in the formula, we get

z = (68 - 50) / 10

z = 18 / 10

z = 1.8

Therefore, the z-score associated with a raw score of 68 is 1.8.

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What is the solution of each matrix equation?

c. [2 3 4 6 ] X = (3 -7]

Answers

To solve the matrix equation [2 3 4 6] X = [3 -7], we need to find the values of the matrix X that satisfy the equation.

The given equation can be written as:

2x + 3y + 4z + 6w = 3

(Here, x, y, z, and w represent the elements of matrix X)

To solve for X, we can rewrite the equation in an augmented matrix form:

[2 3 4 6 | 3 -7]

Now, we can use row operations to transform the augmented matrix into row-echelon form or reduced row-echelon form.

Performing the row operations, we can simplify the augmented matrix:

[1 0 0 1 | 5/4 -19/4]

[0 1 0 -1 | 11/4 -13/4]

[0 0 1 1 | -1/2 -1/2]

The simplified augmented matrix represents the solution to the matrix equation. The values in the rightmost column correspond to the elements of matrix X.

Therefore, the solution to the matrix equation [2 3 4 6] X = [3 -7] is:

X = [5/4 -19/4]

[11/4 -13/4]

[-1/2 -1/2]

This represents the values of x, y, z, and w that satisfy the equation.

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All the students in an algebra class took a 100100-point test. Five students scored 100100, each student scored at least 6060, and the mean score was 7676. What is the smallest possible number of students in the class

Answers

All the students in an algebra class took a 100-point test. Five students scored 100, each student scored at least 60, and the mean score was 76. What is the smallest possible number of students in the class Let the number of students in the class be n. The total marks obtained by all the students = 100n.

The total marks obtained by the five students who scored 100 is 100 x 5 = 500.As per the given condition, each student scored at least 60. Therefore, the minimum possible total marks obtained by n students = 60n.Therefore, 500 + 60n is the minimum possible total marks obtained by n students.

The mean score of all students is 76.Therefore, 76 = (500 + 60n)/n Simplifying the above expression, we get: 76n = 500 + 60n16n = 500n = 31.25 Since the number of students must be a whole number, the smallest possible number of students in the class is 32.Therefore, there are at least 32 students in the class.

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what is the average number of pairs of consecutive integers in a randomly selected subset of 5distinct integers chosen from {1, 2, 3, ...30}

Answers

The average number of pairs of consecutive integers in a randomly selected subset of 5 distinct integers chosen from {1, 2, 3, ... 30} is approximately 0.000203.

The average number of pairs of consecutive integers in a randomly selected subset of 5 distinct integers chosen from {1, 2, 3, ... 30} can be calculated as follows:

First, let's consider the number of possible pairs of consecutive integers within the given set. Since the set ranges from 1 to 30, there are a total of 29 pairs of consecutive integers (e.g., (1, 2), (2, 3), ..., (29, 30)).

Next, let's determine the number of subsets of 5 distinct integers that can be chosen from the set. This can be calculated using the combination formula, denoted as "nCr," which represents the number of ways to choose r items from a set of n items without considering their order. In this case, we need to calculate 30C5.

Using the combination formula, 30C5 can be calculated as:

30! / (5!(30-5)!) = 142,506

Finally, to find the average number of pairs of consecutive integers, we divide the total number of pairs (29) by the number of subsets (142,506):

29 / 142,506 ≈ 0.000203

Therefore, the average number of pairs of consecutive integers in a randomly selected subset of 5 distinct integers chosen from {1, 2, 3, ... 30} is approximately 0.000203.

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city cabs charges a ​$ pickup fee and ​$ per mile traveled.​ diego's fare for a​ cross-town cab ride is ​$. how far did he travel in the​ cab?

Answers

Diego travelled x miles in the cab. To find out how far Diego travelled in the cab, we need to use the information given. We know that City Cabs charges a pickup fee of $ and $ per mile travelled.

Let's assume that Diego traveled x miles in the cab. The fare for the ride would be the pickup fee plus the cost per mile multiplied by the number of miles traveled. This can be represented as follows:

Fare = Pickup fee + (Cost per mile * Miles traveled)

Since we know that Diego's fare for the ride is $, we can set up the equation as:

$ = $ + ($ * x)

To solve for x, we can simplify the equation:

$ = $ + $x

$ - $ = $x

Divide both sides of the equation by $ to isolate x:

x = ($ - $) / $

Now, we can substitute the values given in the question to find the distance travelled:

x = ($ - $) / $

x = ($ - $) / $

x = ($ - $) / $

x = ($ - $) / $

Therefore, Diego travelled x miles in the cab.

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Let x represent the number of short-sleeved shirts ordered and let y represent the number of long-sleeved shirts ordered. how many short-sleeved shirts were ordered? how many long-sleeved shirts were ordered?

Answers

The drama club ordered 150 short-sleeved shirts and 100 long-sleeved shirts.

Let S represent the number of short-sleeved shirts and L represent the number of long-sleeved shirts the drama club ordered.

Given that the price of each short-sleeved shirt is $5, so the revenue from selling all the short-sleeved shirts is 5S.

Similarly, the price of each long-sleeved shirt is $10, so the revenue from selling all the long-sleeved shirts is 10L.

The total revenue from selling all the shirts should be $1,750.

Therefore, we can write the equation:

5S + 10L = 1750

Now, let's use the information from the first week of the fundraiser:

They sold one-third of the short-sleeved shirts, which is (1/3)S.

They sold one-half of the long-sleeved shirts, which is (1/2)L.

The total number of shirts they sold is 100.

So, we can write another equation based on the number of shirts sold:

(1/3)S + (1/2)L = 100

Now, you have a system of two equations with two variables:

5S + 10L = 1750

(1/3)S + (1/2)L = 100

You can solve this system of equations to find the values of S and L. Let's first simplify the second equation by multiplying both sides by 6 to get rid of the fractions:

2S + 3L = 600

Now you have the system:

5S + 10L = 1750

2S + 3L = 600

Using the elimination method here.

Multiply the second equation by 5 to make the coefficients of S in both equations equal:

5(2S + 3L) = 5(600)

10S + 15L = 3000

Now, subtract the first equation from this modified second equation to eliminate S:

(10S + 15L) - (5S + 10L) = 3000 - 1750

This simplifies to:

5S + 5L = 1250

Now, divide both sides by 5:

5S/5 + 5L/5 = 1250/5

S + L = 250

Now you have a system of two simpler equations:

S + L = 250

5S + 10L = 1750

From equation 1, you can express S in terms of L:

S = 250 - L

Now, substitute this expression for S into equation 2:

5(250 - L) + 10L = 1750

Now, solve for L:

1250 - 5L + 10L = 1750

Combine like terms:

5L = 1750 - 1250

5L = 500

Now, divide by 5:

L = 500 / 5

L = 100

So, the drama club ordered 100 long-sleeved shirts. Now, use this value to find the number of short-sleeved shirts using equation 1:

S + 100 = 250

S = 250 - 100

S = 150

So, the drama club ordered 150 short-sleeved shirts and 100 long-sleeved shirts.

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Complete question:

The drama club is selling short-sleeved shirts for $5 each, and long-sleeved shirts for $10 each. They hope to sell all of the shirts they ordered, to earn a total of $1,750. After the first week of the fundraiser, they sold StartFraction one-third EndFraction of the short-sleeved shirts and StartFraction one-half EndFraction of the long-sleeved shirts, for a total of 100 shirts.

Write six different iterated triple integrals for the volume of the tetrahedron cut from the first octant by the plane xyz. Evaluate the first integral. Question content area bottom Part 1

Answers

Using triple integration, the volume of tetrahedron cut from the plane 2x + y + z = 4 is [tex]\frac{16}{3}[/tex].

A tetrahedron is nothing but a three dimensional pyramid.

To find the volume of tetrahedron cut from the plane 2x + y + z = 4, we need to first take one of the three dimension as base. Let as take xy plane as base.

XY as plane implies z = 0, equation becomes 2x + y = 4. To find the limits of X and Y, we put y = 0.

Thus, 2x + 0 = 4 , implying, x = 2.

Thus the range of x is : [0,2]

Putting the value of x in the given equation, the range of y is [0, 4 - 2x]

Similarly, range of z becomes: [0, 4 - 2x - y]

Since z is dependent upon y and x, and, y is dependent on x, Therefore the order of integration must be z, then y and then x.

The volume of tetrahedron becomes:

[tex]=\int\limits^0_2 \int\limits^{4-2x}_0 \int\limits^{4-2x-y}_0 {1} \, dz \, dy \, dx \\\\=\int\limits^0_2 \int\limits^{4-2x}_0 4-2x-y \, dy \, dx \\\\=\int\limits^0_2[ (4-2x)y - \frac{y^2}{2}]^{4-2x}_0 dx\\ \\=\int\limits^0_2 (4-2x)^2 - \frac{1}{2} (4-2x)^2 dx\\\\[/tex]

[tex]=\int\limits^2_0 {\frac{1}{2}(16+4x^2-16x )} \, dx \\\\=\int\limits^2_0(8+2x^2-8x)dx\\\\=[8x+\frac{2}{3} x^3-4x^2]^2_0\\\\=\frac{16}{3}[/tex]

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The complete question is given below:

Use triple integration to find the volume of tetrahedron cut from the plane 2x + y + z = 4.  

Angie is working on solving the exponential equation 23^x =6; however, she is not quite sure where to start

Answers

To solve the exponential equation 23ˣ = 6, Angie can use the equation x = ln(6) / ln(23) to find an approximate value for x.

To solve the exponential equation 23ˣ = 6, you can follow these steps:

Step 1: Take the logarithm of both sides of the equation. The choice of logarithm base is not critical, but common choices include natural logarithm (ln) or logarithm to the base 10 (log).

Using the natural logarithm (ln) in this case, the equation becomes:

ln(23ˣ) = ln(6)

Step 2: Apply the logarithmic property of exponents, which states that the logarithm of a number raised to an exponent is equal to the exponent multiplied by the logarithm of the number.

In this case, we can rewrite the left side of the equation as:

x * ln(23) = ln(6)

Step 3: Solve for x by dividing both sides of the equation by ln(23):

x = ln(6) / ln(23)

Using a calculator, you can compute the approximate value of x by evaluating the right side of the equation. Keep in mind that this will be an approximation since ln(6) and ln(23) are irrational numbers.

Therefore, to solve the equation 23ˣ = 6, Angie can use the equation x = ln(6) / ln(23) to find an approximate value for x.

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Assume the following for this question. Lower and Upper specification limits for a service time are 3 minutes and 5 minutes, respectively with the nominal expected service time at 4 minutes. The observed mean service time is 4 minutes with a standard deviation of 0.2 minutes. The current control limits are set at 3.1 and 4.9 minutes respectively.

Answers

The observed mean service time falls within the current control limits. We can conclude that the process is stable, the service time is in control, and it meets the required specifications.


1. Calculate the process capability index (Cpk) using the formula: Cpk = min((USL - mean)/3σ, (mean - LSL)/3σ), where USL is the upper specification limit, LSL is the lower specification limit, mean is the observed mean service time, and σ is the standard deviation.
2. Plug in the values: USL = 5 minutes, LSL = 3 minutes, mean = 4 minutes, σ = 0.2 minutes.
3. Calculate Cpk: Cpk = min((5-4)/(3*0.2), (4-3)/(3*0.2)) = min(0.556, 0.556) = 0.556.
4. Since the calculated Cpk is greater than 1, the process is considered capable and the service time is in control.
5. The current control limits (3.1 and 4.9 minutes) are wider than the specification limits (3 and 5 minutes) and the observed mean (4 minutes) falls within these control limits.
6. Therefore, the process is stable and meets the specifications.

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Calculate all four second-order partial derivatives and check that . Assume the variables are restricted to a domain on which the function is defined.

Answers

The function is defined on the given domain, we need to make sure that all the partial derivatives are defined and continuous within the domain.

To calculate the four second-order partial derivatives, we need to differentiate the function twice with respect to each variable. Let's denote the function as f(x, y, z).

The four second-order partial derivatives are:
1. ∂²f/∂x²: Differentiate f with respect to x twice, while keeping y and z constant.
2. ∂²f/∂y²: Differentiate f with respect to y twice, while keeping x and z constant.
3. ∂²f/∂z²: Differentiate f with respect to z twice, while keeping x and y constant.
4. ∂²f/∂x∂y: Differentiate f with respect to x first, then differentiate the result with respect to y, while keeping z constant.

To check that the function is defined on the given domain, we need to make sure that all the partial derivatives are defined and continuous within the domain.

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Simplify \[\frac{\binom{n}{k}}{\binom{n}{k - 1}}.\] B) For some positive integer n, the expansion of (1 x)^n has three consecutive coefficients a,b,c that satisfy a:b:c

Answers

The ratio a : b : c is \(\binom{n}{k} : \binom{n}{k + 1} : \binom{n}{k + 2}\).

To simplify the expression [tex]\[\frac{\binom{n}{k}}{\binom{n}{k - 1}},\][/tex] we can use the definition of binomial coefficients.
The binomial coefficient \(\binom{n}{k}\) represents the number of ways to choose \(k\) items from a set of \(n\) items, without regard to order. It can be calculated using the formula \[\binom{n}{k} = \frac{n!}{k!(n - k)!},\] where \(n!\) represents the factorial of \(n\).
In this case, we have \[\frac{\binom{n}{k}}{\binom{n}{k - 1}} = \frac{\frac{n!}{k!(n - k)!}}{\frac{n!}{(k - 1)!(n - k + 1)!}}.\]
To simplify this expression, we can cancel out common factors in the numerator and denominator. Cancelling \(n!\) and \((k - 1)!\) yields \[\frac{1}{(n - k + 1)!}.\]
Therefore, the simplified expression is \[\frac{1}{(n - k + 1)!}.\]
Now, moving on to part B of the question. To find the three consecutive coefficients a, b, c in the expansion of \((1 + x)^n\) that satisfy the ratio a : b : c, we can use the binomial theorem.
The binomial theorem states that the expansion of \((1 + x)^n\) can be written as \[\binom{n}{0}x^0 + \binom{n}{1}x^1 + \binom{n}{2}x^2 + \ldots + \binom{n}{n - 1}x^{n - 1} + \binom{n}{n}x^n.\]
In this case, we are looking for three consecutive coefficients. Let's assume that the coefficients are a, b, and c, where a is the coefficient of \(x^k\), b is the coefficient of \(x^{k + 1}\), and c is the coefficient of \(x^{k + 2}\).
According to the binomial theorem, these coefficients can be calculated using binomial coefficients: a = \(\binom{n}{k}\), b = \(\binom{n}{k + 1}\), and c = \(\binom{n}{k + 2}\).
So, the ratio a : b : c is \(\binom{n}{k} : \binom{n}{k + 1} : \binom{n}{k + 2}\).

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13. Find the sum of the arithmetic


sequence 4, 1, -2, -5,. , -56.


-777-3,3-3,


A


B


-546


C -542


D -490

Answers

The sum of the arithmetic sequence is -468 (option D).

To find the sum of an arithmetic sequence, we can use the formula:

Sum = (n/2) * (first term + last term)

In this case, the first term of the sequence is 4, and the common difference between consecutive terms is -3. We need to find the last term of the sequence.

To find the last term, we can use the formula for the nth term of an arithmetic sequence:

last term = first term + (n - 1) * common difference

In this case, the last term is -56. We can use this information to find the number of terms (n) in the sequence:

-56 = 4 + (n - 1) * (-3)

-56 = 4 - 3n + 3

-56 - 4 + 3 = -3n

-53 = -3n

n = -53 / -3 = 17.67

Since the number of terms should be a whole number, we round up to the nearest whole number and get n = 18.

Now, we can find the sum of the arithmetic sequence:

Sum = (18/2) * (4 + (-56))

Sum = 9 * (-52)

Sum = -468

Therefore, the sum of the arithmetic sequence is -468 (option D).

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