Using petid as a primary key in the pet relation is generally a good way to uniquely identify each data record in the relation. However, in some cases, it may be necessary to include personid as part of the primary key of the pet relation.
This is because each pet should have a unique identifier, and petid is specifically designed to serve this purpose. This would be the case if a person can have more than one pet in the database, and if the same petid value is used for more than one pet (which would violate the uniqueness requirement of a primary key).
By including personid as part of the primary key of the pet relation, we ensure that each pet in the database has a unique identifier (i.e., a unique combination of petid and personid). This allows us to avoid any confusion that might arise if two or more pets in the database had the same petid value. It also allows us to link each pet to its owner via the personid attribute, which can be useful for querying and reporting on the data.
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Which of the following equations has no solution?
A.m + 9 = 8
B.m - 3 = m + 3
C.m + 9 = 9 + m
D. All the choices
Answer:
B. m-3=m+3
Step-by-step explanation:
Because the others have a solution such as 0 and -1.
And That would eliminate D
Find the indicated side of the
triangle.
b
30°
12
a = -
Answer:
Find the indicated side of the
triangle.
b
30°
12
a = -
Step-by-step explanation:
A fruit seller bought a crate of 190 kiwi fruits for $66.50. If he sells each kiwi fruit for 55 cents, what is the
least number of kiwi fruits he must sell in order to make a profit of not less than $20?
A 90° rotation around the origin followed by a reflection across the line x = 3 maps △JKL, with coordinates J(–2, 2), K(–2, 6), and L(–8, 2), to △PQR. Find the area of △PQR.
Answer: A 90° rotation around the origin maps point (x, y) to (-y, x). So, the image of point J after a 90° rotation is J' = (-2, 2) -> (-2, -2).
A reflection across the line x = 3 maps point (x, y) to (2x - 3, y). So, the image of point J' after a reflection across x = 3 is J'' = (-2, -2) -> (4, -2).
Similarly, we can find the images of K and L:
K' = (-2, 6) -> (-6, -2)
K'' = (-6, -2) -> (-2, -2)
L' = (-8, 2) -> (2, -8)
L'' = (2, -8) -> (8, -2)
Therefore, the image of triangle JKL after the 90° rotation and reflection is triangle PQR, with vertices P = J'', Q = K'', and R = L''.
The area of triangle PQR can be found using the Shoelace Formula:
P = [(4 -2) + (-2 -2) + (8 -2) * (-2 - (-8))]/2 = [6 + 4 * 6]/2 = 30/2 = 15 square units.
So, the area of triangle PQR is 15 square units.
Step-by-step explanation:
jack's favorite number is 836. jill subtracts a secret number from 836 and her answer is the smallest possible combination of all the digits from jack's favorite number. what is the secret number?
The secret number is 564 as we solve it by given question.
jack's favorite number is 836 so here we have number 836 and
jill subtracts a secret number from 836 and her answer is the smallest possible combination of all the digits from jack's favorite number
so here we have a number 836
let we subtract x from 836 to get a number which is smallest number by using 836
the number which we can make by using these 3 degits are
368, 386, 638, 683, 836, 863 anf from all these numbers the smallest number which can be using 836 is 368
as given in question we have 836 and we will subtract x and get 368 so
836 - x = 368
x = 836 - 368
x = 564
the secrets number is 564.
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a knitted hat pattern comes in styles with stitch options and sizes, and there are yarns appropriate for the hat. disregarding size, how many different hats can be made?
A knitted hat pattern comes in 4 styles with 4 stitch options and 3 sizes, and there are 7 yarns appropriate for the hat. There are 112 different hats that can be made using the knitted hat pattern, disregarding size.
To find the total number of different hats that can be made using the knitted hat pattern, we need to multiply the number of choices for each feature.
There are 4 styles to choose from and 4 stitch options, so there are 4 x 4 = 16 different combinations of style and stitch.
For each of these style and stitch combinations, there are 7 yarns that can be used, so the number of possible yarn choices is 7.
Therefore, the total number of different hats that can be made, disregarding size, is:
16 (style and stitch combinations) x 7 (yarn choices) = 112
This calculation shows how the multiplication principle of counting can be used to find the total number of outcomes in a multi-stage process where the number of choices at each stage is known. In this case, we multiplied the number of style and stitch combinations by the number of yarn choices to find the total number of different hats that can be made.
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Complete question is:
A knitted hat pattern comes in 4 styles with 4 stitch options and 3 sizes, and there are 7 yarns appropriate for the hat. Disregarding size, how many different hats can be made?
25 Points! Please help!!
I need help with this
Answer: 29 yards
Step-by-step explanation:
First, we want to find how much she spent. We will subtract the leftover from the original amount.
$15 - $9.49 = $5.51 spent
Next, we will convert this value into cents.
$5.51 = 551 cents
Last, we will divide this by the price per yard to find how many yards she bought.
551 / 19 = 29 yards
Answer:
29 yards
Step-by-step explanation:
$15.00 - $9.49= $5.51
$5.51 divide by .19 per yard = 29
In a class of 30 students x +10 study algebra, 10+3 study statistics, 4 study both algebra and statistics. 2x study only Algebra and 3 study neither algebra nor statistics
1. Illustrate the information one a Venn diagram.
2. How many students study;
A. Algebra
B. Only statistics
1. The Venn diagrams are attached
2. When the statistics students number = 10·x + 3, we have;
The number of students that study
Algebra = 128/11Statistic = 213/11When the statistics students number = 2·x + 3, we have;
The number of students that study
Algebra = 16Statistic = 15What is the rationale for the above response?The parameters given are;
Total number of students = 30
Number of students that study algebra n(A) = x + 10
Number of students that study statistics n(B) = 10·x + 3
Number of student that study both algebra and statistics n(A∩B) = 4
Number of student that study only algebra n(A\B) = 2·x
Number of students that study neither algebra or statistics n(A∪B)' = 3
Therefore;
The number of students that study either algebra or statistics = n(A∪B)
From set theory we have;
n(A∪B) = n(A) + n(B) - n(A∩B)
n(A∪B) = 30 - 3 = 27
Therefore, we have;
n(A∪B) = x + 10 + 10·x + 3 - 4 = 27
11·x+13 = 27 + 4 = 31
11·x = 18
x = 18/11
The number of students that study
a. Algebra
n(A) = 18/11 + 10 = 128/11
b. Statistic
n(B) = 213/11
Hence, we have;
n(A - B) = n(A) - n(A∩B) = 128/11 - 4 = 84/11
Similarly, we have;
n(B - A) = n(B) - n(A∩B) = 213/11 - 4 = 169/11
However, assuming n(B) = (2·x + 3), we have;
n(A∪B) = n(A) + n(B) - n(A∩B)
n(A∪B) = 30 - 3 = 27
Therefore, we have;
n(A∪B) = x + 10 + 2·x + 3 - 4 = 27
2·x+3 + x + 10= 27 + 4 = 31
3·x = 18
x = 6
Therefore, the number of students that study
a. Algebra
n(A) = 16
b. Statistics
n(B) = 15
Hence, we have;
n(A - B) = n(A) - n(A∩B) = 16 - 4 = 12
Similarly, we have;
n(B - A) = n(B) - n(A∩B) = 15 - 4 = 11
See the attached Venn Diagrams.
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Question 12
Identify Structure Choose two different inequalities that each has a solution of x ≤ 4. One inequality should involve multiplication with a
negative coefficient and the other should involve division with a negative coefficient.
□A) 2-2
□ B) 421
943-1
D)-3x ≥ 12
□6)-2x ≤-8
OF)-5x2-20
↓
The equation that would give the solution of x ≤ 4 is -2x ≤-8
What is inequality in mathematics?In mathematics, "inequality" refers to a relationship between two expressions or values that is not equal to each other. Therefore, inequality emerges from a lack of balance.
the equation is given as -2x ≤-8. We are to solve the inequality so as to get the value of x
we are to divide through -2x ≤-8 by -2
-2x / -2 ≤ -8 / -2
x ≤ 4
the other parts of the question are not clearly stated
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Please help (will mark as brainlest)
Answer:
(9y + 4)(5x + 7)
Step-by-step explanation:
susan climbed 18 trees throughout each forest in her county. each forest is the same size. is this sample of the trees in the county likely to be representative?
Yes, this sample of the trees in the county likely to be representative if each forest is the same size.
What is representative sample?Representative sample, the sample must accurately reflect the population studied in demographics and characteristics of the chosen subjects.
For example, a representative sample will reflect only those within the study population and should not extend to those outside the study. If Jose is interested in studying the exercise habits of college athletes, only the population of college athletes should be considered for the selection of a representative sample. Jose will not choose athletes from high school or career athletes as part of his representative sample.
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Richard and Teo have a combined age of 28. Richard is 10 years older than twice Teo's age. How old are Richard and Teo?
The algebra word problem method shows that Richard is 22 years old and Teo is 6 years old.
Algebra word problems in mathematicsAlgebra is used in our daily lives without us even recognizing it. Students can relate to and comprehend the significance of mathematics in the real world by solving algebraic word problems in worksheets.
Algebraic word problems usually comprise interpreting words into numbers, variables, their coefficients, and the use of appropriate arithmetic operations.
From the information given, we can the following system of equations as follows:
r + t = 28 --- (1)
r = 2t + 10 --- (2)
(2t + 10) + t = 28
3t + 10 = 28
3t = 28 - 10
3t = 18
t = 18/3
t = 6
From (1), r + t = 28
r + 6 = 28
r = 28 - 6
r = 22
Therefore, we can conclude that Richard is 22 years old and Teo is 6 years old.
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The population of a large US city is 1,703,210. Show how you could express this in Scientific Notation
The population of a large US city is 1.70321 × 10⁶ in Scientific Notation.
Scientific NotationIt may be referred to as scientific form or standard index form.
Scientific notation is a way of expressing numbers that are too large or too small to be conveniently written in decimal form.
We know that, a number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10.
According to the question,
the population of a large US city is 1,703,210. we need to show this number in Scientific Notation.
The number is written in two parts,
The digits, with the decimal point placed after the first digit, followed by × 10 to a power that puts the decimal point where it should be
Therefore,
1,703,210 = 1.70321 × 10⁶.
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The school that Stefan goes to is selling tickets to a choral performance. On the first day of ticket sales, the school sold 3 senior citizen tickets and 1 child ticket for a total of $38. The school took in $52 on the second day by selling 3 senior citizen tickets. Find the price of a senior citizen ticket and the price of a child ticket.
The school sold 3 senior citizen tickets and 1 child ticket for a total of $38. The school took in $52 on the second day by selling 3 senior citizen tickets.The price of a senior citizen ticket is $17.33 and the price of a child ticket is $5.01.
What is Word Problem?
A word problem is a mathematical problem that is presented in the form of a story or scenario, often using words and symbols to describe a real-world situation. Word problems require the solver to read and understand the problem, identify the relevant information, translate the information into mathematical expressions or equations, and then solve for the unknown quantity.
Word problems can involve a wide range of mathematical concepts, including arithmetic, algebra, geometry, statistics, and calculus, and are often used to test students' problem-solving abilities and mathematical reasoning skills.
Let's call the price of a senior citizen ticket "s" and the price of a child ticket "c".
From the information given, we know:
3s + c = 38 (equation 1)
3s = 52 (equation 2)
Using equation 2, we can solve for s:
3s = 52
s = 17.33 (rounded to two decimal places)
Now we can substitute this value of s into equation 1 and solve for c:
3s + c = 38
3(17.33) + c = 38
c = 38 - 3(17.33)
c = 5.01 (rounded to two decimal places)
So the price of a senior citizen ticket is $17.33 and the price of a child ticket is $5.01.
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I NEED HELP PLEASEEEEEEEEE!!!!!!
Step-by-step explanation:
so, it starts (year 0 after 2000) with 350 foxes.
after 1 year the number had increased by 5%.
that means : 350×1.05
because 5% is represented by 0.05.
5% of 350 is 350×0.05 (= 17.5)
and to add 5% means that this is added to the original 100% (= 1).
100% + 5% = 105%
means
1 + 0.05 = 1.05
so, again, after the first year we have
350×1.05
foxes.
after the second year we have to multiply that by 1.05 again :
350×1.05×1.05
and so on.
so, what we are doing is multiplying the original number of foxes by powers of 1.05 (with the exponent being the number of years after 2000).
f(x) = 350 × (1.05)^x
Two numbers are co-prime if they do not have any prime factors in common.
List all possible numbers that are co-primes with the following numbers that are < 50:
(a) 390
(b) 210
(c) 49335
On solving the provided question, we can say that Here, 21 and 22 only share a single element, which is 1. Since they are co-prime factor, their HCF equals 1.
what is prime factor?Any natural number other than 1 with just itself and the number 1 as its divisors is considered a prime factor. Actually, 2, 3, 5, 7, 11, and so on are some of the first prime numbers. an amount that has been multiplied to produce another amount. By dividing 15 by 3 and 5, for instance, we get 3 5 = 15. main elements: Prime factors include all factors that are prime but are not composite. A few prime factors of 30 are 2, 3, and 5. Only 2 and 3 are prime factors of 12, so listing 2 twice as 2 2 3 (or 22 3) is necessary to factorize 12. The sum of 2 + 3 is not 12.
21 and 22:
1, 3, 7, and 21 are the factors of 21.
1, 2, 11, and 22 are the factors of 22.
Here, 21 and 22 only share a single element, which is 1. Since they are co-prime, their HCF equals 1.
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A man and a woman share a cash prize of £2855 between them in the
ratio 1:4 respectively. The woman shares her winnings between herself,
her daughter and her son in the ratio 5:1:2. How much does her
daughter receive?
Answer:
285.50
Step-by-step explanation:
The total for the ratio of 1:4 is 5. The ratio to the woman to the total is
4:5 or
[tex]\frac{4}{5}[/tex] = [tex]\frac{x}{2855}[/tex] Cross multiply and solve for x
4(2855) = 5x
11420 = 5x Divide both sides by 5
2284 =x
The woman's portion of the total is 2284.
The woman takes the 2284 and divides it in a ratio of 5:1:2. The total is 8.
The daughter will receive the ratio of 1:8 of the total.
[tex]\frac{1}{8}[/tex] = [tex]\frac{x}{2284}[/tex] cross multiply and solve for x
8x = 2284 Divide both sides by 8
x = 285.50
The daughter's portion is 285.50
3. PLEASE THIS IS URGENT
B. Bill's Bikes sells new and used bikes. Bill buys used bikes, fixes them, and marks them up by 80%. The sales-
person selling the bike receives a 25% commission on the markup.
a. Find the missing values in the table. Show your work below
Strategies include:
Using proportions
Percent bar models
Multiplying with the decimal (or fractional) equivalent
Reasoning about with benchmark percent values
Costs and Revenue for Roberto's Sales
Buying
Markup
Selling
Commission
Profit (money the
(25% of markup) shop makes on the sale)
Price (80% of buying price) Price
$100
$180
$20
$60
$10
$55
$125
PLEASE AND I NEED THE WORK SHOWN FOR BOTH CHARTS
The values that van be put in the table based on the information will be:
Buying price (dollars) 100.
Mark-up 80.
Selling price 180
Commission 20
Profit 60
Buying price (dollars) 10
Mark-up 8
Selling price 18
Commission 2
Profit 6
Buying price (dollars) 55
Mark-up 44
Selling price 99
Commission 11
Profit 33
Buying price (dollars) 125
Mark-up 100
Selling price 225
Commission 25
Profit 75
How to explain the valueIt should be noted that the markup is 80% of the buying price. For example, when the buying price is $10, the markup will be:
= 80% × $10
= $8
The selling price is that addition of buying price and markup. This will be:
= $10 + $8
= $18
The commission is 25% of markup. This will be:
= 25% × 8
= $2
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A cable company charges an installation fee to install cable at a residence. There is also a monthly fee for the cable service. The total cost for months 2, 4, 6 and 8 are $145, $255, $365, and $475, respectively. How much is the installation fee? Assume that the relationship between the two quantities is linear
$13,000 and $15,000.
mark brainlyest
HELP pls will mark you the brainliest
The function among all options is y=30.5(0.7)ˣ.
What is the graph of a function?The graph of a function represents a set of all points in a plane. It helps to derive the nature of the function.
The function must satisfy the points that are given in the graph.
When x=0, y=21.35(0.7)ˣ=21.35(0.7)⁰=21.35.
But the given point is (0,30.5).
Hence, it cannot be the required function.
When x=0, y=30.5(21.35)ˣ=30.5(21.35)⁰=30.5.
When x=1, y=30.5(21.35)ˣ=30.5(21.35)¹=651.175.
But the given point is (1,21.35).
Hence, it cannot be the required function.
When x=0, y=30.5(1.3)ˣ=30.5(1.3)⁰=30.5.
When x=1, y=30.5(1.3)ˣ=30.5(1.3)¹=39.65
But the given point is (1,21.35).
Hence, it cannot be the required function.
When x=0, y=30.5(0.7)ˣ=30.5(0.7)⁰=30.5.
When x=1, y=30.5(0.7)ˣ=30.5(0.7)¹=21.35.
When x=2, y=30.5(0.7)ˣ=30.5(0.7)²=14.945≈14.95.
It satisfies all three given points.
Therefore, the required function is y=30.5(0.7)ˣ.
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Nathan was bored. He went outside to find something to do. His mother was planting flowers. Nathan offered to help her. They planted flowers from 2:40 p.m. until 5:10 p.m. They talked and had a good time together. How long did Nathan and his mother work together?
Answer: 2 hours and 30 minutes
Step-by-step explanation:
Sin (x-30)*cos (x/2) >0
Answer:
15
Step-by-step explanation:
A sea horse weighs 42oz. Together, 3 sea monkeys and a sea horse weighs the same as 8 sea monkeys plus 9oz. How much does a sea monkey weigh?
Answer:
a sea monkey weighs 6.6oz
Step-by-step explanation:
. Solve for n.
scale: 1 1/2 inches: 250 miles
scale measure: 3/4 inches
actual measure: n miles
A. 100 miles
B. 125 miles
C. 187 1/2 miles
D. 281 1/4 miles
Answer:
C) 187 1/2 miles
Step-by-step explanation:
We can start by using the formula for converting between scale measure and actual measure:
actual measure = scale measure * (actual distance / scale distance)
Here, the scale measure is 3/4 inch and the scale distance is 1 1/2 inches, so:
actual measure = (3/4) * (n / 250)
Rearranging the equation, we can isolate n:
n = (actual measure * 250) / (3/4)
Substituting in the actual measure of 3/4 inch, we find:
n = (3/4 * 250) / (3/4) = 250 miles
So the answer is C) 187 1/2 miles.
A farmer has 7 3/4 rows of radishes in one field,4 3/4 rows of radishes in another field,and 6 1/4 rows of radishes in a third field .How many rows of radishes does he have altogether.
Answer:
18 and 3/4 rows of radishes
Step-by-step explanation:
6 + 4 + 7 = 17
3/4 + 3/4 + 1/4 = 7/4
7/4 = 1 3/4
17 + 1 3/4 = 18 3/4
Answer: 18 and 3/4 rows of radishes
Since all the fractions have the same denominator,
you can combine 3/4 + 3/4 + 1/4 together into 1 and 3/4
Adding in the numbers 7 + 4+ 6 and the 1 and 3/4 would amount to 18 and 3/4
6 At Bay Beach Tennis Club, there are 10 tennis courts. This
morning, all of the tennis courts are being used, some for
doubles matches and some for singles matches. Each court with
a doubles match has 4 players, and each court with a singles
match has 2 players. There are 28 players in all. On how many
courts are people playing doubles? On how many courts are
people playing singles?
Education.com
Courts With Singles Matches
Y
204
16
16
14
12
10
8
6
2
0
Cost per Adult Ticket (6)
16 18
2 4 6 8 10 12 14
Courts With Doubles Matches
20
Find worksheets, games, lessons & more at education.com/resourc
2007-2023 Education
Answer:
To find the number of courts with doubles matches, we need to determine the total number of players playing doubles. If each court with a doubles match has 4 players, then the total number of players playing doubles would be 4 times the number of courts playing doubles.
Since there are 28 players in total, and each court with a singles match has 2 players, the number of players playing singles would be 28 - 4x, where x is the number of courts playing doubles.
Since each court with a singles match has 2 players, the number of courts playing singles would be 28/2 = 14.
So, 28 - 4x = 14, and solving for x, we get x = 7.
Therefore, there are 7 courts with doubles matches and 14 courts with singles matches.
question 6 the area of the rectangle is 48x3y5 square inches. its width is 6xy2 inches. what is the length of the rectangle?
The length of the rectangle is [tex]8x^2y^3[/tex] inches when the area of the rectangle is [tex]48x^3y^5[/tex] square inches.
To find the length of the rectangle, we can use the formula for the area of a rectangle, which is:
Area = length x width
We are given that the area of the rectangle is [tex]48x^3y^5[/tex] square inches, and its width is [tex]6xy^2[/tex] inches. Therefore, we can substitute these values into the formula to get:
[tex]48x^3y^5 = length * 6xy^2[/tex]
Simplifying this equation, we can cancel out the common factors of 6x and [tex]y^2[/tex] on both sides to get:
[tex]8x^2y^3 = length[/tex]
Therefore, the length of the rectangle is [tex]8x^2y^3[/tex] inches.
To verify our answer, we can substitute the length and width back into the formula for the area of a rectangle and check if it matches the given area:
Area = length x width = [tex](8x^2y^3) * (6xy^2) = 48x^3y^5[/tex]
Since this matches the given area, we can be confident that our answer is correct. Therefore, the length of the rectangle is [tex]8x^2y^3[/tex] inches.
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A small publishing company is releasing a new book. The production costs will include a one-time fixed cost for editing and an additional cost for each book
printed. The total production cost C (in dollars) is given by the function C=15. 95N+750, where N is the number of books.
The total revenue earned (in dollars) from selling the books is given by the function R-32. 80N.
Let P be the profit made (in dollars). Write an equation relating P to N. Simplify your answer as much as possible.
0
?
If The total revenue earned (in dollars) from selling the books is given by the function R-32. 80N.The equation relating the profit P (in dollars) to the number of books N is P = 16.85N - 750.
The profit made by the company is the difference between the total revenue earned and the total production cost, so we can write:
P = R - C
Substituting the expressions for R and C, we get:
P = 32.80N - (15.95N + 750)
Simplifying the right-hand side, we get:
P = 16.85N - 750
This equation shows that the profit made by the company is a linear function of the number of books printed. The slope of the line is the revenue per book (32.80 dollars), minus the cost per book (15.95 dollars), which is 16.85 dollars.
The intercept of the line is the fixed cost for editing (750 dollars). The equation can be used to estimate the profit for any given number of books printed, and to determine the break-even point, which is the number of books that need to be sold to cover the total production cost.
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2 + cscsecx/cscsecx = (sinx+cos)
Answerk bzijnjlngljntgojengojnetgihnrtgkte4wg
