Answer:
24d^2 - 62d + 35
Step-by-step explanation:
To expand this expression, you can use the FOIL method, which stands for First, Outer, Inner, Last. It means that you multiply the first terms, then the outer terms, then the inner terms, and finally the last terms, and then add them all up.
So,
(6d - 5)(4d - 7) = 6d x 4d - 6d x 7 - 5 x 4d + 5 x 7
= 24d^2 - 42d - 20d + 35
= 24d^2 - 62d + 35
Therefore, the solution is 24d^2 - 62d + 35
Answer: \(24d^{2} -62d +35\)
Step-by-step explanation:
Expanding it you get \(24d^{2} - 42d - 20d + 35\). Simplifying you get \(24d^{2} -62d +35\).
Tax on a new boat costing 7200 is 504. At the same tax ratio what would be tax on a new boat costing 8000
Given :-
Tax on a new boat costing 7200 is 504 .To Find :-
The tax on the boat costing 8000 .Solution :-
Cost of the boat is 7200 and tax on it is 504. We can find the tax% as ,
→ Tax% = Tax/Cost *100
→ Tax % = 504/7200*100% = 7%
Hence the tax on boat costing 8000 will be ,
→ Tax = 7% of 8000
→ Tax = 7/100*8000 = 560
Hence the tax on the boat costing 8000 is 560.
a- What are the different logs used to obtain porosity? Explain the principles of measurement, quantity measured and its relation to porosity. Illustrate with equations and/or sketches.
Different logs measure different physical properties of the formation that are related to porosity, and the relationship between the log measurement and porosity can be expressed through equations.
The different logs used to obtain porosity and their principles of measurement, quantities measured, and relation to porosity.
There are three main types of logs used to obtain porosity: neutron logs, density logs, and sonic logs.
Neutron logs: These logs measure the hydrogen content in a formation, which is directly related to porosity. The tool emits neutrons that interact with hydrogen atoms, and the resulting gamma rays are measured. The count rate decreases with increasing porosity. The neutron log can be expressed as:
Porosity = (neutron log reading - matrix reading) / (fluid reading - matrix reading)
Density logs: Density logs measure the bulk density of a formation, which can be related to porosity. The tool emits gamma rays that interact with the formation, and the scattered gamma rays are measured. The bulk density decreases with increasing porosity. The density log can be expressed as:
Porosity = (matrix density - bulk density) / (matrix density - fluid density)
Sonic logs: Sonic logs measure the travel time of sound waves through a formation, which can be related to porosity. The tool sends an acoustic wave and measures the time it takes to travel a specific distance. The travel time increases with increasing porosity. The sonic log can be expressed using Wyllie's time-average equation:
Porosity = (sonic log reading - matrix reading) / (fluid reading - matrix reading)
In summary, neutron logs measure hydrogen content, density logs measure bulk density, and sonic logs measure travel time of sound waves. These measurements can be used to calculate porosity using the respective equations provided.
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This exercise refers to a standard deck of playing cards. assume that 5 cards are randomly chosen from the deck. how many hands contain exactly two 3s and two 6s?
The total number of hands that contain exactly two 3s and two 6s is: 6 * 6 * 44 = 1584.
To find the number of hands that contain exactly two 3s and two 6s when 5 cards are randomly chosen from a standard deck of playing cards, we can use combinatorics.
First, we need to choose the two 3s from the four 3s in the deck. This can be done in (4 choose 2) = 6 ways.
Next, we need to choose the two 6s from the four 6s in the deck. This can also be done in (4 choose 2) = 6 ways.
After selecting the 3s and 6s, we have one remaining card to choose from the remaining 44 cards in the deck.
Thus, the total number of hands that contain exactly two 3s and two 6s is: 6 * 6 * 44 = 1584.
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the state of california has a mean annual rainfall of 22 inches, whereas the state of new york has a mean annual rainfall of 42 inches. assume that the standard deviation for both states is 4 inches. a sample of 30 years of rainfall for california and a sample of 45 years of rainfall for new york has been taken. if required, round your answer to three decimal places.
There is evidence to suggest that the mean annual rainfall for the state of California and the state of New York is different.
The state of California has a mean annual rainfall of 22 inches, whereas the state of New York has a mean annual rainfall of 42 inches. Assume that the standard deviation for both states is 4 inches. A sample of 30 years of rainfall for California and a sample of 45 years of rainfall for New York have been taken. If required, round your answer to three decimal places.
The value of the z-statistic for the difference between the two population means is -9.6150.
The critical value of z at 0.01 level of significance is 2.3263.
The p-value for the hypothesis test is p = 0.000.
As the absolute value of the calculated z-statistic (9.6150) is greater than the absolute value of the critical value of z (2.3263), we can reject the null hypothesis and conclude that the difference in mean annual rainfall for the two states is statistically significant at the 0.01 level of significance (or with 99% confidence).
Therefore, there is evidence to suggest that the mean annual rainfall for the state of California and the state of New York is different.
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Need help ASAP please
Answer:
$45
Step-by-step explanation:
sum the parts of the ratio, 3 + 5 = 8 parts
Divide the amount by 8 to find the value of one part of the ratio.
$120 ÷ 8 = $15 ← value of 1 part of the ratio, thus
3 parts = 3 × $15 = $45 ← amount David received
Answer:
$45
Step-by-step explanation:
ratio is 3:5
David gets 3x, Jack gets 5x
So, 3x+5x=120
8x=120
x=15
David got 3x = 3*15 = $45
Enter the sum in simplest form. pls answer I give brainliest
Answer:
2/5
Step-by-step explanation:
2/10+2/10=4/10
4/10 divided by 2/2= 2/5
Hope this helps!
Answer;
2/10 + 2/10 is 4/10 and then simplified it would be 2/5 because 2 goes into both 4 and 10.
2/10 + 2/10 = 4/10
4/10 = 2/5
Hope this Helps!
The formula for the area of a triangle is `A\ =\ \frac{1}{2}bh`, where b is the base of the triangle and h is the height. Use the formula to find the area of the triangle shown. Write the area as a fraction or mixed number in simplest form.
Answer:
A = 1/15 m²
Step-by-step explanation:
Let us assume the value of the base and the height of the triangle since we are not given;
Let Base b = 2/5 m
height h = 1/3 m
Area of the triangle A = 1/2bh
Substitute the values into the formula;
A = 1/2 (2/5)(1/3)
A = 2/(2*5*3)
A = 1/15 m²
Hence the area as a fraction or mixed number in simplest form is 1/15m²
Note that the values are assumed and any values of the base and height can be used in the scenario
Which function models the relationship
between the concentration of the
medication in milligrams, p(t), and the
number of hours since the medication
was taken, t?
Functiοn mοdels the relatiοnship between the cοncentratiοn οf the medicatiοn in milligrams is P(t) = 25.5(0.838)ˣ and number οf hοurs since the medicatiοn was taken, t is 2 hοurs.
The cοncentratiοn οf the drug in the blοοdstream at t = 8 hοurs is 24 mg/L. Frοm t= 0 tο t= 2 hr, the cοncentratiοn is increasing and after 2 hrs the cοncentratiοn is decreasing. The level οf the drug in the blοοdstream reaches its maximum value at t=2 hrs , and the cοncentratiοn in the blοοdstream at that time is 25.5 mg/L.
\After the drug reaches its maximum level in the blοοdstream, 8 additiοnal hοurs are required fοr the level tο drοp tο 16 mg/L. As at t= 10 hrs, cοncentratiοn is 16 mg/L and maximum cοncentratiοn is at t=2hrs. Sο, additiοnal hοurs= 10-2=8 hrs
P(t) = 25.5( 1-16.2%)ˣ
= 25.5((100 - 16.2)/100)ˣ
= 25.5(83.8/100)ˣ
P(t) = 25.5(0.838)ˣ
Hence, functiοn mοdels the relatiοnship between the cοncentratiοn οf the medicatiοn in milligrams is P(t) = 25.5(0.838)ˣ and number οf hοurs since the medicatiοn was taken, t is 2 hοurs.
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Complete question:
9. A patient has taken 25.5 mg of a prescribed medication. The concentration of the medication in the body decreases at a rate of 16.2% per hour.
Which function models the relationship between the concentration of the medication in milligrams, p(t), and the number of hours since the medication was taken, t?
If the equation 2x
2 – 8x – 42 = 0 is solved by factoring, what is its positive
solution set?
A. {-3} B. {5} C. {6} D. {7}
Answer:
B.{5}
Step-by-step explanation:
2-8x-42=0
(÷2), we get,
1-4x-21=0
-4x-20=0
-4x=20
x=20÷(-4)
x=(-5)
since the question asks for a positive set, the answer is [x=5]
The positive solution set is D. {7}.
What is a set ?A set is a well defined collection of objects written by commas and closed by second brackets.
According to the given question the equation 2x² - 8x - 42 = 0 have two factors and we have write the positive factor in form of a set.
2x² - 8x - 42 = 0
x² - 4x - 21 = 0
x² -7x + 3x - 21 = 0
x(x-7) + 3(x - 7) = 0
(X+3) = 0 OR (x-7) = 0
x = -3 OR x = 7.
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What are two coordinates on this graph?
Answer:
(0,5) and (6,0)
Step-by-step explanation:
Given the figure below find the values of x and z
(12x +2)°
94°
z°
Answer:
z = 94
x = 7
Step-by-step explanation:
The angle with a measure of 94° and the angle labeled "z" are vertical angles
Vertical angles are congruent ( equal to each other )
Which means that because "z"s vertical angle = 94° z also equals 94°
The angle labeled with the expression ( 12x + 2 ) and the angle with a measure of 94° are supplementary angles
Supplementary angles add up to equal 180
Hence, 94 + 12x + 2 = 180
^ (Note that this is the equation we will use to solve for x )
Now we solve for x
94 + 12x + 2 = 180
step 1 combine like terms
94 + 2 = 96
we now have 180 = 96 + 12x
step 2 subtract 96 from each side
180 - 96 = 84
96 - 96 cancels out
we now have 84 = 12x
step 3 divide each side by 12
84 / 12 = 7
12x / 12 = x
we're left with x = 12
Answer:
z = 94
x = 7
Step-by-step explanation:
The total cost C(g) of producing q goods is given by: C(q) = 0.01q^3 - 0.6q^2+ 12qWhat is the fixed cost?fixed cost = ____dollarsWhat is the maximum profit if each item is sold for 10 dollars? maximum profit = ____dollars
Answer:
Explanations:
HELP HELP HELP HELP HELP HELP
Step-by-step explanation:
You can take the numerator as one factor and 1/denominator as another.
Just an example:
a(x + 2) and 1/(a(x - 1)), with a rational value of a ≠ 0.Let a = 1, then the following product will give what we have
(x + 2) × 1/(x - 1) = (x + 2)/(x - 1)If two pieces of fruit are randomly picked out of a covered basket with 5 apples and 3 oranges, what is the probability that the two pieces of fruit are oranges?
Answer:
i would say 3/8 if thats an option
Step-by-step explanation:
Probability helps us to know the chances of an event occurring. The probability that the two pieces of fruit are oranges is 3/28.
What is Probability?Probability helps us to know the chances of an event occurring.
\(\rm Probability=\dfrac{Desired\ Outcomes}{Total\ Number\ of\ outcomes\ possible}\)
Given that the two pieces of fruit are randomly picked out of a covered basket with 5 apples and 3 oranges. Therefore, the probability that the two pieces of fruit are oranges is,
Probability = (3/8) × (2/7) = 6/56 = 3/28
Hence, the probability that the two pieces of fruit are oranges is 3/28.
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Mr. Klein bought 55 Star Wars figurines right after he
saw Star Wars for the first time in 1977. Now, in 2021,
he decides he will add an additional 11 figurines to his
collection each month. The function f(t) = 11t+55
represents the total number of figurines, f(t), Mr. Klein
has in his collection as a function of the number of
months, t.
What is the highest numbers of months that can pass
such that Mr. Klein still has less than 253 figurines in
his collection?
Answer:
542
Step-by-step explanation:
May the 4th be with you (When it's May 4th lol)
how many ways are there to select 22 chocolates from 3 varieties if there are only 5 bittersweet left and you must buy at least 2 of them? also, there are only 7 milk chocolates available.
The total number of ways to select 22 chocolates from the 3 varieties, buying at least 2 of the 5 bittersweet chocolates and with only 7 milk chocolates available, is
\(${5\choose2} \times {17\choose20} + {5\choose3} \times {16\choose19} + {5\choose4} \times {15\choose18} + {5\choose5} \times {14\choose17} + {7\choose17}$\)
To solve this problem, we can use the combinations formula. We will need to consider two cases: one where we select 2 or more bittersweet chocolates, and another where we select all 5 bittersweet chocolates.
Case 1: Selecting 2 or more bittersweet chocolates
First, we select 2 bittersweet chocolates out of the 5 available, and then we select the remaining 20 chocolates from the 3 varieties, excluding the 2 bittersweet chocolates we have already selected. This gives us:
\(${5\choose2} \times {17\choose20}$\) ways to select the chocolates.
Next, we select 3 bittersweet chocolates out of the 5 available, and then we select the remaining 19 chocolates from the 3 varieties, excluding the 3 bittersweet chocolates we have already selected. This gives us:
${5\choose3} \times {16\choose19}$ ways to select the chocolates.
Continuing in this way, we can select 4 or 5 bittersweet chocolates and then select the remaining chocolates from the other varieties. The total number of ways to do this is:
\(${5\choose2} \times {17\choose20} + {5\choose3} \times {16\choose19} + {5\choose4} \times {15\choose18} + {5\choose5} \times {14\choose17}$\)
Case 2: Selecting all 5 bittersweet chocolates
In this case, we only need to select 17 chocolates from the other varieties, since we have already selected all 5 bittersweet chocolates. This gives us:
\(${7\choose17}$\) ways to select the chocolates.
So, the total number of ways to select 22 chocolates from the 3 varieties, buying at least 2 of the 5 bittersweet chocolates and with only 7 milk chocolates available, is:
\(${5\choose2} \times {17\choose20} + {5\choose3} \times {16\choose19} + {5\choose4} \times {15\choose18} + {5\choose5} \times {14\choose17} + {7\choose17}$\)
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We can calculate the total number of ways by summing up the results from each case:
Total number of ways = (1 * 3^20) + (1 * 3^19) + (1 * 3^18)
To determine the number of ways to select 22 chocolates from 3 varieties with the given constraints, we can break down the problem into cases:
Case 1: Selecting 2 bittersweet chocolates
In this case, we need to select 20 more chocolates from the remaining varieties. Since we must buy at least 2 bittersweet chocolates, there are 3 possibilities for the selection of the remaining chocolates:
18 chocolates from the remaining varieties (no milk chocolates)
17 chocolates from the remaining varieties and 1 milk chocolate
16 chocolates from the remaining varieties and 2 milk chocolates
Case 2: Selecting 3 bittersweet chocolates
In this case, we need to select 19 more chocolates from the remaining varieties. There are again 3 possibilities for the selection of the remaining chocolates:
17 chocolates from the remaining varieties (no milk chocolates)
16 chocolates from the remaining varieties and 1 milk chocolate
15 chocolates from the remaining varieties and 2 milk chocolates
Case 3: Selecting 4 bittersweet chocolates
In this case, we need to select 18 more chocolates from the remaining varieties. There are 3 possibilities for the selection of the remaining chocolates:
16 chocolates from the remaining varieties (no milk chocolates)
15 chocolates from the remaining varieties and 1 milk chocolate
14 chocolates from the remaining varieties and 2 milk chocolates
Now, let's calculate the number of ways for each case:
Case 1: Selecting 2 bittersweet chocolates
There is only 1 way to select the 2 bittersweet chocolates since we must buy at least 2 of them. For the remaining 20 chocolates, we have 3 possibilities for each chocolate (from the remaining varieties or milk chocolates). So, the total number of ways for this case is 1 * 3^20.
Case 2: Selecting 3 bittersweet chocolates
There is only 1 way to select the 3 bittersweet chocolates. For the remaining 19 chocolates, we have 3 possibilities for each chocolate. So, the total number of ways for this case is 1 * 3^19.
Case 3: Selecting 4 bittersweet chocolates
There is only 1 way to select the 4 bittersweet chocolates. For the remaining 18 chocolates, we have 3 possibilities for each chocolate. So, the total number of ways for this case is 1 * 3^18.
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pls help i don’t understand
Answer:
the decimal number is 19
Answer:
Step-by-step explanation:
3.8/0.2 = 19.0
9/2 divided by 3/4
What the answer??
Answer:
6
Step-by-step explanation:
Answer:
6
Step-by-step explanation:
\(\frac{9}{2}\)÷\(\frac{3}{4}\)Use the keep change flip method. Make this a multiplication equation by turning 3/4 into 4/3
\(\frac{9}{2}\)×\(\frac{4}{3}\)Solve.
\(\frac{36}{6}\)Simplify
6Complete this item.
Identify 1 and 2. Select all that apply of the following terms: acute, right, obtuse, adjacent, vertical, complementary, supplementary.
Answer:
Hello!!! Princess Sakura here ^^
Step-by-step explanation:
They are vertical angles and the are acute because they are less than 90 degrees.
Sarah was 50 1/4 inches tall when she was 12 years old. she was 48 1/2 inches tall when she was 11. how much did she grow during the year?
Given:ST=3x=3 and TU=2x=9 what is the value of ST
Answer:(x+3)2 4+4=( x+3)2=4
Step-by-step explanation:
om 3: Linear Regression
FINAL PROJECT: DAY 3
he manager at Stellarbeans, collected data on the daily high temperature and revenue from coffee salm
ne days this past fall are shown in the table below
Day 1 Day 2 Day 3 Day 4 Day 5 Day & Day 7 Day 8 Day 9
High Temperature, t 54
Coffee Sales, f(t)
50
70
58
52
48
$2900 $3080 $2500 $2580 $2200 $2700 $3000 $3620 $372
e linear regression function, f(t), that estimates the day's coffee sales with a high temperature
A linear regression function, f(t), that estimates the day's coffee sales with a high temperature is f(t) = -58t + 6,182.
The correlation coefficient (r) is -0.94.
Yes, r indicates a strong linear relationship between the variables because r is close to -1.
How to find an equation of the line of best fit and the correlation coefficient?In order to determine a linear regression function and correlation coefficient for the line of best fit that models the data points contained in the table, we would have to use an online graphing tool (scatter plot).
In this scenario, the high temperature would be plotted on the x-axis of the scatter plot while the y-values would be plotted on the y-axis of the scatter plot.
From the scatter plot (see attachment) which models the relationship between the x-values and y-values, the linear regression function and correlation coefficient are as follows:
f(t) = -58t + 6,182
Correlation coefficient, r = -0.944130422 ≈ -0.94.
In this context, we can logically deduce that there is a strong linear relationship between the data because the correlation coefficient (r) is closer to -1;
-0.7<|r| ≤ -1.0 (strong correlation)
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Missing information:
State the linear regression function, f(t), that estimates the day's coffee sales with a high temperature of t. Round all values to the nearest integer. State the correlation coefficient, r, of the data to the nearest hundredth. Does r indicate a strong linear relationship between the variables? Explain your reasoning.
simplify (-4)(9)/(-6)
Mrs. Viera spent $95.55 buying 13 pizzas for a class pizza party.
How much did one pizza cost?
Which type of graphs can show continuous data?
a. line graph
b. bar graph
c. line plot
d. pictograph
Answer:
bar and line
Step-by-step explanation:
Given M = 31+2j-4k and N = 61-6j-k, calculate the vector product Mx N. K Î+ j+ Need Help? Read It Watch It
The vector product (cross product) of M and N is -10j + 155k - 362j - 6k + 24i.
The vector product (cross product) of two vectors M and N is calculated using the determinant method. The cross product of M and N is denoted as M x N. To calculate M x N, we can use the following formula,
M x N = (2 * (-1) - (-4) * (-6))i + ((-4) * 61 - 31 * (-1))j + (31 * (-6) - 2 * 61)k
Simplifying the equation, we get,
M x N = -10j + 155k - 362j - 6k + 24i
Therefore, the vector product M x N is -10j + 155k - 362j - 6k + 24i.
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5 (- 9) + 12, t = 20
Which statements could he include in his explanation? select two options. the domain of both functions is all real numbers. the domain of f(x) is x > 5. the domain of g(x) is x > 5. the range of f(x) is y > 0. the range of g(x) is y > 0.
The correct option is 'The domain of both functions is all real numbers'.
According to statement
Here, functions are f(x) = 5x and g(x) =5x
Since the domain of f(x) is, D= { x : x belongs to all real numbers.}
Therefore, Domain of f(x) is all real numbers.
Since f(x) and g(x) have the same value,
Therefore, Domain of g(x) is also the set of real numbers.
Now, range of f(x) is , R= { 5x : x belongs to all real numbers.}
Therefore, Range of f(x) is all real numbers.
Range of g(x) is also all real numbers.
So, we can say by the above explanation, only option (1) is correct.
DISCLAIMER: The question was incomplete. Please find the full content below.
QUESTION
Keshawn is asked to compare and contrast the domain and range for the two functions.
f(x) = 5x
g(x) = 5x
Which statements could he include in his explanation? Check all that apply.
1. The domain of both functions is all real numbers.
2. The domain of f(x) is x > 5.
3. The domain of g(x) is x > 5.
4. The range of both functions is y > 5.
5. The range of f(x) is y > 0.
6. The range of g(x) is y > 0.
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Are shape I and shape II similar? If so, give the dilation that proves they are similar. If not, explain why the shapes are not similar.
Answer:
The answer is "They are similar".
Step-by-step explanation:
They were comparable in this respect because both aspect ratios of the top triangle are one square more. The top triangle is equal to the base triangles if you remove one square away from the height and width.
Otherwise, we can say that it forms all different. The dilation factor which translates that bottom left point of shape I to form II is 2. But this does not map the other shape I vertices onto form II. There's, therefore, no dilation in form I of maps on form II.
A catering service offers appetizers, main courses, and desserts. A banquet committee is to select appetizers, main courses, and desserts. How many ways can this be done?.
A catering service offers appetizers, main courses, and desserts. A banquet committee is to select appetizers, main courses, and desserts. Then it can be done in 6 ways
We have 3 items (n = 3),
Appetizers = A
Main course = M
Dessert = D
which can be ordered in 6 different ways. The problem is solved by thinking it as a permutation of 3 elements.
The formula for that is:
P = n!
P = 3! = 3 x 2 x 1 = 6
Let's see check it:
AMD
ADM
MAD
MDA
DMA
DAM
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