The following statements are true: if augmented matrices of two linear systems are row equivalent, the systems have the same solution set; two matrices are called row equivalent if one matrix can be transformed into another by applying a sequence of elementary row operations; in an echelon form of a matrix, all entries in a column below the leading entry are zero; the reduced echelon form of a matrix is not defined uniquely.
The row replacement operation, when performed on a matrix, results in interchanging two rows. This statement is not true. Row replacement operations can also be used to add multiples of one row to another, it doesn't necessarily interchange two rows.
The statement "if augmented matrices of two linear systems are row equivalent, the systems have the same solution set." is true. Row equivalence is a property of matrices that describes how two matrices can be transformed into one another by performing elementary row operations. If two matrices are row equivalent, it means that they can be transformed into the same row echelon form, which implies that they have the same row space, and therefore the same solution set.
The statement "two matrices are called row equivalent if one matrix can be transformed into another by applying a sequence of elementary row operations." is true. Two matrices are row equivalent if one matrix can be transformed into another by applying a sequence of elementary row operations, such as row interchanges, row scaling, and row replacement.
The statement "in an echelon form of a matrix, all entries in a column below the leading entry are zero." is true. An echelon form of a matrix is a matrix that has the following properties: all non-zero rows are above any rows of all zeroes, the leading entry of a non-zero row is to the right of the leading entry of the row above it. In an echelon form of a matrix, all entries in a column below the leading entry are zero.
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The heights in cm of 5 students are :60,58,54,56,42
Find the mean deviation for the given data
Answer:
54
Step-by-step explanation:
take the average of the number given
use the following dataset to answer the question 11 to 14
History class final test scores
79, 82, 85, 91, 97, 73, 88, 87, 85, 92, 90, 85, 86, 91, 94, 85, 92
what is the average class score? Round your answer to the nearest whole number.
Answer:
82
Step-by-step explanation:
average class score=total number of test scores/number of test scores
sum up the scores 79+82+85+91+97+73+88+87+85+92+90+85+86+91+94+85+92
=1482÷18=82.33333
=82
Question:
(a) Find the equation for the family of linear functions with slope 2 and sketch several members of the family.
(b) Find an equation for the family of linear functions such that f(2)=1 and sketch several members of the family.
(c) Which functions belong to both families?
Slope-intercept form
Equation of slope-intercept form is given as y=mx+b where m is the slope of the line and c is the y-intercept. m is used to measure the steepness of the graph. This form is simply the method of writing the equation of a line so that the slope and y-intercept are rapidly apparent.
For a family of linear functions with slope 2, the equation is y = 2x + b, where b is the y-intercept. For a family of linear functions such that f(2) = 1, the equation is y = x + b, where b is the y-intercept. Both families of linear functions have the same equation, y = x + b, and all functions belonging to both families have a slope of 1 and a y-intercept of b.
(a) The equation for the family of linear functions with slope 2 is y = 2x + b, where b is the y-intercept. To sketch several members of the family, plot several points (x, y) with the equation, then connect the points to form a line.
(b) The equation for the family of linear functions such that f(2) = 1 is y = x + b, where b is the y-intercept. To sketch several members of the family, plot several points (x, y) with the equation, then connect the points to form a line.
(c) The equation for both families of linear functions is y = x + b, where b is the y-intercept. All functions belonging to both families have a slope of 1 and a y-intercept of b.
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2. question 2 fill in the blanks to make the print prime factors function print all the prime factors of a number. a prime factor is a number that is prime and divides another without a remainder.
A Prime factor is a natural number that has only two factors namely 1 and the number itself. One is not a prime number. Prime factors are odd in nature except for 2 because 2 is the only even prime factor. Example of prime factors are 2,3,5,7,11 etc
def print_prime_factors(number):
factor = 2
while factor <= number:
# Check if factor is a divisor of number
if number % factor == 0:
# If it is, print it and divide the original number
print(factor)
number = number / factor
else:
# If it's not, increment the factor by one
factor+=1
return "Done"
print_prime_factors(100)
Complete question- Above mentioned is the correct code with all blanks filled.
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solve:
g(16)=-1/2x+5
pls show work
The function g(16) = -1/2 x + 5 is solved by substitution to get -3
What is substitution as used in math?The process of changing an algebraic letter to it's value corresponds to the procedure known as substitution.
In the problem, the equation g(16) = -1/2 x + 5,
Considering the equation, the value of x is 16. The letter x will be replaced by 16 in the equation
g(16) = - 1/2 x + 5
g(16) = - 1/2 * 16 + 5
g(16) = - 8 + 5
g(16) = -3
Substituting x = 16 in the equation g(16) = -1/2 x + 5 results to a solution of -3
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2x+y=32
x+3y=36
solve the equation by elmination method
Answer:
x=12
y=8
Point form: (12,8)
Step-by-step explanation:
I've done this question before
Answer:
y=8 and x=12
Step-by-step explanation:
2x+y =32
multiply by 1
= 2x+y=32
x+3y=36
multiply by 2
=2x+6y=72
2x+y=32 - 2x+6y=72
=5y/5=40/5
=y=8
2x+y=32
=2x+8=32
=2x=32-8
=2x=24
=2x/2=24/2
=x=12
scientists collect data on the blood cholesterol levels (milligrams per deciliter of blood) of a random sample of 24 laboratory rats. a 95% confidence inter- val for the mean blood cholesterol level m is 80.2 to 89.8. which of the following would cause the most worry about the validity of this interval? (a) There is a clear outlier in the data.
(b) A stemplot of the data shows a mild right skew.
(c) You do not know the population standard deviation �
.
(d) The population distribution is not exactly Normal.
(e) None of these would be a problem because the t procedures are robust.
Please help!!! Thx so much!!!!!
Answer:
AB = 49
ABC = 253
BAC = 156
ABC = 311
Step-by-step explanation:
The whole circle is 360
360 - 107 - 49 = 204
We now know the measurement of the 3 sections shown.
AB = 49
ABC = 49 + 204 = 253
BAC = 107 + 49 = 156
ACB = 107 + 204 = 311
the following purchase is made at each store: 6 pounds of sugar, 3 cans of peaches, 2 pounds of chicken, and 5 loaves of bread. use matrix multiplication to find the total bill at each store. you may leave decimal answers in this problem. interpret the solution with context to the application.
The total cost of the items purchased at each store is $68, $52, and $72 respectively.
The total bill at each store can be found by using matrix multiplication. We will create a matrix of the costs of each item, and then multiply it by a matrix of the amounts of each item purchased. The resulting matrix will give us the total cost of the items purchased.
Let x be the matrix of costs per item:
x = [[5, 2.5, 2, 3],
[4, 2.75, 1.5, 2],
[6, 3, 1.75, 3.5]]
Let y be the matrix of amounts of items purchased:
y = [[6, 3, 2, 5]]
We can then find the total cost at each store by multiplying x and y together:
xy = [[68, 36.75, 29, 45.5],
[52, 28.25, 21, 30],
[72, 40, 33.5, 52.5]]
Interpreting the solution with context to the application, we can see that the total cost of the items purchased at each store is $68, $52, and $72 respectively.
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16 years ago, Thomas invested $3,000 into a bank account with a 5% return compounded annually. Which of the following equations indicates the total amount of money Thomas has after t years of his original investment? A=3,000(.5)^tA=3,000(1.05)^t A = 3,000(.5)^(1/16)A = 3,000(1.05)^(1/16)
Thomas invested $3,000 into a bank account with a 5% interest return compounded annually. then the following equations indicates the total amount of money 3000(1.05)^1/16
Thomas invested $3,000 into a bank account with a 5% return compounded annually.
A: represents the current balance or compound amount in the account.
P: represents the principal (the original amount deposited).
R: annual interest rate (in decimal form).N: the number of times per year that interest is compounded .T: time in years the money has been invested.
The formula of interest is A=P (1+r)ⁿ
A=Final amount
P= Principal ( deposit invested)
r= interest rate
n= time
So, in this case
P=$3,000
r= 5% or 0.05
n=1/ 16
Replacing
A=3000(1+0.05)^1/16
A=3000( 1.05)^1/16
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Q. What angle corresponds to angle 6?
Answer:
angel 2
Step-by-step explanation:
Angle 2 corresponds to angle 6.
For the function ƒ(x) = 2 (x − 10)² + 6, find ƒ−¹(x).
For the function ƒ(x) = 2 (x − 10)² + 6 then F⁻¹ = [tex]\frac{x- 6}{2}[/tex] + 10 is the inverse of the given functions.
Calculating the problem:y = [tex]\frac{x - 6}{2}[/tex] + 10
F⁻¹ = [tex]\frac{x -6 }{2}[/tex] + 10
Inverse functions:A function that is capable of reversing into another function is referred to as an inverse function or anti function. Simply put, if a function is denoted by "f" or "F," then the inverse function is denoted by "f-1" or "F-1." The inverse function returns the original value for which a function provided the output.
If any function "f" takes x to y, then the inverse of "f" will take y to x. A function that consists of its inverse retrieves the original value when considering functions, where f and g are inverses, and f(g(x)) = g(f(x)) = x. Then, the opposite of f(x) is g(y) = (y-5)/2 = x.
How is the inverse of a function or relationship determined?The equation of the inverse relation can be obtained by substituting every y in the equation for every x in the equation that describes the relation between the variables x and y.
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The sports bar owner runs a regression to test whether there is a relationship between Red Sox away games and daily revenue. Which of the following statements about the regression output is true? SELECT ALL THAT APPLY.
A. The average daily revenue for days when the Red Sox do not play away is $1,768.32.
B. The average daily revenue for days when the Red Sox play away is $1,768.32.
C. The average daily revenue for days when the Red Sox play away is $2,264.57.
D. The average daily revenue for days when the Red Sox do not play away is $1,272.07.
E. On average, the bar’s revenue is $496.25 higher on days when the Red Sox play away than on days when they do not.
B and E are true.The regression output can be used to determine whether there is a relationship between Red Sox away games and daily revenue.
The output can also be used to calculate the average daily revenue for each scenario.
For the scenario where the Red Sox do not play away, the output will give the average daily revenue, which is $1,768.32. So, statement A is true.
For the scenario where the Red Sox play away, the output will give the average daily revenue, which is $2,264.57. So, statement B is true.
For the scenario where the Red Sox do not play away, the output will also give the average daily revenue, which is $1,272.07. So, statement D is false.
Finally, the output can be used to calculate the difference between the average daily revenue when the Red Sox play away and when they do not, which is $496.25. So, statement E is true.
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You invest $1,200 that is compounded continuously at 9% for 10 years. What is the equation you use?
Answer:
FV = $1,200 * e^(0.09*10)
Step-by-step explanation:
The equation used to calculate the future value of an investment compounded continuously is:
FV = PV * e^(r*t)
where:
FV = future value
PV = present value (initial investment) = $1,200
r = annual interest rate (9% = 0.09)
t = number of years (10 years)
So, the future value of the investment would be:
FV = $1,200 * e^(0.09*10)
How do you express area in square feet algebraically
Length (in ft) x Width (in ft) = area in sq. ft
Hope this helps
I'm not good at math so I got this from my notes :)
If it doesn't help then it was worth an attempt...
Norfolk Sporting Goods purchases merchandise with a catalog list price of $40,000. The retailer receives a 30% trade discount and credit terms of 2/10, n/30. What amount should Norfolk pay if paid within discount period?1. Create the table that contains the following information for the last
quarter where data required for this exercise is available.
Please note that using the data for previous years and/or previous
estimates will produce grade zero for this part of the project.
Omit the intermediate lines found in Tables 7 and 8 on the web site.
Gross domestic product
Gross national product
Net national product (you should calculate it as Gross national product minus
Consumption of fixed capital)
National income
Personal income
Personal Disposable Income
Personal Savings
Present the information that you received in your project.
To answer the relevant part of the question, the amount that Norfolk should pay within the discount period is $23,520.
What is the discount period?The discount period is based on the credit terms.
For instance, 2/10, n/30 show the discount and credit terms. The explanation is that a 2% cash discount will be received by the customer if payment is made within 10 days of purchase.
Furthermore, the customer's credit period expires after 30 days. Thus, from day 11 to day 30, the customer does not qualify for cash discounts.
The catalog list price = $40,000
Trade discount = 40%
Discounted price = $24,000 ($40,000 x (1 - 40%)
Cash discount = $480 ($24,000 x 2%)
Cash payment = $23,520 ($24,000 - $480)
Thus, Norfolk Sporting Goods will pay $23,520 if it utilizes the discount.
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The vertices of ABC are A(3,1), B(1,5), and C(5,3). Graph the image of ABC
after a composition of the transformations in the order they are listed.
Translation: (x,y)-(x-6,y+1)
Rotation: 90° about the origin
A“= (_,_)
B“= (_,_)
C“= (_,_)
The area of rectangle ABCD exists 12 sq. units.
What is meant by vertices?A polygon's vertex is a location where the sides or edges of the item or two rays or line segments meet. Vertex is a noun, whereas vertices is the plural.
Vertices are the points at which the edges of the three-dimensional shape converge. Edges are the lines that separate two faces, while faces are flat surfaces.
One of the items that are linked together in a graph is called a vertex (or node). The terms "edges" or "links" refer to the connections between the vertices. a network with ten nodes (or vertices) and eleven edges (links).
The coordinates of point D exists (3,3).
Area of rectangle ABCD = l × b = AB × BC
On further calculation we get
Area of rectangle ABCD = 6 × 2
Area of rectangle ABCD = 12 sq. units
Therefore, the area of rectangle ABCD exists 12 sq. units.
The complete question is:
Three vertices of a rectangle ABCD are A(3,1), B(-3, -1) and C(-3, 3). Plot these points on the graph paper and find the coordinates of the fourth vertex D. Also, find the area of the rectangle ABCD.
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two consecutive whole numbers, each less than 20, are multiplied and the product is increased by 17. There are exactly two values of the lesser of two consecutive numbers of which the result is not a prime number. Find both values of the lesser numbers?
The two Consecutive number is 16 and 17.
What is consecutive number?
Numbers that follow one another sequentially are known as consecutive numbers. Every time there are two numbers, there is a 1 difference. The mean and median of a sequence of numbers are equal. If n is a number, then it follows that n, n+1, and n+2 are also numbers. Examples. 1, 2, 3, 4, 5.
Here the according to the question those two consecutive number are multiplied and increased by 17 and answer is not prime number. Now,
=> 1× 2+17 = 2+17 = 19(prime number)
=> 2×3+17=6+17=23(prime number)
=> 3×4 +17 = 12+17 = 29(prime number)
=> 4×5+17 = 20+17 = 37(prime number)
=> 5×6+17 = 30+17 = 47(Prime number)
=> 6×7+17 = 42+17 = 59(prime number)
=> 7×8+17 = 56+17 = 73(prime number)
=> 8×9+17 =72+17 = 89(prime number)
=> 9×10+17 = 90+17= 107(prime number)
=> 10×11+17=110+17 = 127(prime number)
=> 11×12+17=132+17 =149(prime number)
=> 12×13+17=156+17 = 173(prime number)
=> 13×14+17=182+17 = 199(prime number)
=> 14×15+17=210+17 = 227(prime number)
=> 15×16+17 = 240+17=257 (prime number)
=> 16×17+ 17= 272+17 = 289( not prime number)
Hence the two consecutive number is 16 and 17.
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which of the following refers to a statement that says that a change in one variable tends to follow or be associated with a change in another variable?
Correlation: A correlation is a statement that suggests there is a relationship between two variables, where a change in one variable tends to follow or be associated with a change in another variable.
A correlation is a statement that suggests there is a relationship between two variables. It does not necessarily mean that a change in one variable will cause a change in the other variable, but that a change in one tends to follow or be associated with a change in the other. For example, a correlation could be made between the amount of rainfall a region receives and the number of plants that are able to grow there. If the rainfall increases, then the number of plants that can grow in the region is likely to increase as well. A correlation can be either positive or negative, with a positive correlation meaning that an increase in one variable will likely result in an increase in the other, and a negative correlation meaning that an increase in one variable will likely result in a decrease in the other. Correlation can be used to make predictions, but should not be confused with causation, as correlation does not necessarily imply causation.
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The complete question: which of the following refers to a statement that there is a relationship between two variables that can change in one variable tends to follow or be associated with a change in another variable?
There are integers b, c for which both roots of the polynomial x^2-x-1 are also roots of the polynomial x^5-bx-c. Determine the product bc.
It is discovered that the phrase under the division symbol is 3x2 - (b - 2)x - c, meaning that b = 5 and c = 3.
find the roots of x2 - x - 1 = 0
---> Using the quadratic formula, the roots are [ 1 + sqrt(5) ] / 2 and [ 1 + sqrt(5) ] / 2.
Placing these values into the equation x5 - bx - c = 0, we get:
x = [ 1 + sqrt(5) ] / 2 ---> ( [ 1 + sqrt(5) ] / 2 )5 - b( [ 1 + sqrt(5) ] / 2 ) - c = 0
---> [ 176 + 80sqrt(5) ] / 32 - ( [ 1 + sqrt(5) ] / 2 )b - c = 0
multiplying by 32 ---> 176 + 80sqrt(5) - 16b - 16sqrt(5)b - 32c = 0
Using the same steps for x = [ 1 - sqrt(5) ] / 2 , we get: 176 - 80sqrt(5) - 16b + 16sqrt(5)b - 32c = 0
Now, let's combine these two results: 176 + 80sqrt(5) - 16b - 16sqrt(5)b - 32c = 0
176 - 80sqrt(5) - 16b + 16sqrt(5)b - 32c = 0
Subtract the lower equation from the upper: 160sqrt(5) - 32sqrt(5)b = 0 ---> 160sqrt(5) = 32sqrt(5)b ---> b = 5
Now, substitute this value for b into 176 + 80sqrt(5) - 16b - 16sqrt(5)b - 32c = 0
--->176 + 80sqrt(5) - 16(5) - 16sqrt(5)(5) - 32c = 0
--->176 + 80sqrt(5) - 80 - 80sqrt(5) - 32c = 0
--->96 - 32c = 0
--->c = 3
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P( – 3, – 5) after a reflection over the y-axis.
Answer: 3,-5
Step-by-step explanation:
Answer: (3, -5)
......................................
A coffee machine dispenses coffee into paper cups. You’re supposed to get 10 ounces of coffee, but the amount varies slightly from cup to cup. Here are the amounts measured in a random sample of 20 cups. Is there evidence that the machine is shortchanging customers? (You may assume that the number of ounces dispensed in normally distributed)
9.9 , 9.7 ,10.0 ,10.1 , 9.9 , 9.6 , 9.8 , 9.8 , 10.0 , 9.5 ,10.1 , 9.9 , 9.6 , 10.2 , 9.8 , 10.0 , 9.9 , 9.5 , 9.9 , 9.7
a) Find a 95% confidence interval for the number of ounces dispensed by the machine.
b) Write a sentence giving your results in the context of the problem.
c) What does 95% confidence mean in this problem?
d) Does your confidence interval suggest that the company is or is not short-changing their customers? Explain
The mean of the sample data is 9.91 ounces and the standard deviation is 0.16 ounces.
To find the 95% confidence interval, we need to calculate the mean and standard deviation of the sample data. The 95% confidence interval can then be calculated as the mean ± 1.96 times the standard deviation, which is (9.59, 10.23) ounces.
b) The 95% confidence interval for the number of ounces dispensed by the machine is (9.59, 10.23) ounces.
c) 95% confidence means that if the same experiment were to be repeated 100 times, 95 of the confidence intervals would contain the true mean.
d) The confidence interval does not suggest that the company is short-changing their customers because it includes 10 ounces, which is the expected amount of coffee to be dispensed.
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For each problem, draw 2 triangles that have the listed properties. Try to make them as different as possible.
In a single triangle, there is a 40-degree and a 60-degree angle.
What is meant by triangles?A triangle is a three-sided polygon with three vertices. The triangle's internal angle, which is 180 degrees, is constructed. It implies that the internal angles of a triangle add up to 180 degrees.
Triangles of the scalene, isosceles, and equilateral varieties differ from one another in terms of side length. The triangle is a scalene triangle if the lengths of the three sides are all different. An isosceles triangle is one with all three sides having equal lengths.
A 40-degree and a 60-degree angle are both present in one triangle. three for the side opposite the 40-degree angle, x for the side opposite the 60-degree angle, and six for the third side. A 40 degree angle and an 80 degree angle are present in the second triangle. The third side has a length of 8, the side opposite the 80-degree angle has a length of y, and the side opposite the 40-degree angle has a length of 5.
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A graphic designer wants to reproduce the
logo of a mountain-climbing club for some club stationery.
The logo is a triangle with the angles shown.
W Sheliqsiz
A. The designer wants the base to be 2 inches long. How
should the triangle be drawn?
Ci ilority Postulate help the
Timis
60°
50°
Answer: Sorry!
Step-by-step explanation:
Hello! I can help you if you can add the photo and fix the typos.
Complete the missing values in the solution to the equation.
The missing value in the solution to the equation is 4. The value of x is 4 and y is -6 which is (4, -6).
What is solution to a equation?A solution to an equation is a value or values that make the equation true. For example, if the equation is x + 3 = 7, then the solution to the equation would be x = 4.
To solve an equation, you must use a combination of addition, subtraction, multiplication, division, and algebraic manipulations to isolate the unknown variable. For instance, to solve the equation x + 3 = 7, you would subtract 3 from both sides of the equation to find x = 4.
It is important to note that an equation may have more than one solution. For example, the equation x2 + 4 = 0 has two solutions, x = 2 and x = -2.
In some cases, equations may not have a solution. This happens when the equation is not true for any value of the unknown variable. For example, the equation 0 = 1 is not true for any value of x, so it does not have a solution.
In summary, a solution to an equation is a value or values that make the equation true. To solve an equation, you must use a combination of addition, subtraction, multiplication, division, and algebraic manipulations to isolate the unknown variable. An equation may have multiple solutions or no solution at all.
The given equation is 4x + y = 10.
We have the value of y is -6,
To find the value of x, using the equation 4x + y = 10
4x - 6 = 10
4x = 10 +6
4x = 16
x = 4
The missing value in solution is 4.
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estimated work cost [it is a time-dependent variable cost related to manpower project resources and the time they are utilized. equipment when associate with time usage (i.e., hourly rentals) is also classified as work.]
The total estimated work cost for the project would be $5200 ($5000 + $200).
The formula for calculating the estimated work cost for a project is C = P x T, where C is the estimated cost, P is the hourly rate of the personnel and T is the total amount of time spent working on the project. For example, if the hourly rate of a project manager is $50 and they work 100 hours on the project, the estimated work cost would be $5000 (50 x 100). In addition, any equipment that is used on an hourly rental basis should also be included in the estimated work cost calculation. For example, if a piece of equipment is used for 10 hours at a rate of $20 per hour, the estimated cost for this equipment would be $200 (20 x 10). Therefore, the total estimated work cost for the project would be $5200 ($5000 + $200).
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Suppose that sin A = 0.622. What is the value of cos A?
Answer :
0.783
Step-by-step explanation:
We know that,
sin^2 (x) + cos^2 (x) = 1
Thus,
[tex] \sin^{2} (A) + cos^{2} (A) = 1 \\ cos^{2} A =1 - sin^{2} A \\ cos^{2} A = 1 - (0.622)^{2 } \\ cos^{2} A = 1 - 0.386884 \\ cos A = \sqrt{0.613116} \\ = 0.783[/tex]
Can you help me ples
because rules are meant to be guided and I also steps for acquiring what you need
Which word is used incorrectly?
The mailperson's job is to put the envelope's in every mailbox on the block.
OÀ
A
O
O
B
C
D
every
mailperson's
block
envelope's
The word used incorrectly in the sentence is "envelopes".
The word used incorrectly in the sentence is "envelopes". The comment should be "envelopes" instead. This is because "envelopes" is a plural noun, referring to more than one envelope. The apostrophe in "envelopes" implies possession, indicating that the envelopes belong to someone or something, but it is not necessary for this context.
Hence, the correct sentence should be "The mailperson's job is to put the envelopes in every mailbox on the block."
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x – 6y < 12 (7, -1)
(is this a solution or not??)
Based on this inequality x – 6y < 12, the ordered pair (7, -1) is not a solution.
What is an ordered pair?In Mathematics, an ordered pair is sometimes referred to as a coordinate and it can be defined as a pair of two (2) elements or data points that are commonly written in a fixed order within parentheses as (x, y), which represents the x-coordinate (abscissa) and the y-coordinate (ordinate) on the coordinate plane of any graph.
In order to determine if (7, -1) is a solution of the given linear equation, we would have to test the given ordered pair by substituting its values into the linear equation as follows;
x – 6y < 12
7 – 6(-1) < 12
7 + 6 < 12
13 < 12 (False).
Read more on ordered pair here: brainly.com/question/25462418
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