-12X -- 66y + 10
_____________
45
(1 point) select all statements that are correct. there may be more than one correct answer. the statements may appear in what seems to be a random order. a. if a system has three unknowns and the reduced row echelon form of the augmented matrix has two nonzero rows, then the system can have an infinite number of solutions. b. a system of linear equations with more unknowns than equations will have an infinite number of solutions. c. every matrix a is row equivalent to a matrix in (row) echelon form. d. every matrix has a unique reduced row echelon form. e. adding one row to a multiple of another row is one type of elementary row operation. f. if a system has three unknowns and its reduced row echelon form of the augmented matrix has three nonzero rows, then the system has at least one solution. g. adding a multiple of one row to another row is one type of elementary row operation. h. none of the above
The answer to all the following options is given below along with the suitable reasoning.
a. Incorrect. If a system of linear equations has more unknowns than equations and the reduced row echelon form of the augmented matrix has two nonzero rows, the system is inconsistent and has no solutions.
b. Incorrect. A system of linear equations with more unknowns than equations is underdetermined and can have either no solutions or an infinite number of solutions.
c. Correct. A matrix can be row-reduced to an echelon form, which is a simpler form that makes it easier to find the solution to the system of linear equations represented by the matrix.
d. Correct. Every matrix can be row-reduced to a unique reduced row echelon form by performing a sequence of elementary row operations, which are reversible and preserve the solutions of the system of linear equations.
e. Correct. Adding a multiple of one row to another row is one type of elementary row operation used in row-reducing a matrix to its reduced row echelon form.
f. Correct. If a system of linear equations has three unknowns and the reduced row echelon form of the augmented matrix has three nonzero rows, then the system is consistent and has a unique solution.
g. Correct. Adding a multiple of one row to another row is one type of elementary row operation used in row-reducing a matrix to its reduced row echelon form.
h. Incorrect. Some of the statements are correct.
Therefore, The answer to all the following options is given above along with the suitable reasoning.
To learn more about linear equations,
Visit; brainly.com/question/11897796
#SPJ4
The answer to all the following options is given below along with the suitable reasoning.
a. Incorrect. If a system of linear equations has more unknowns than equations and the reduced row echelon form of the augmented matrix has two nonzero rows, the system is inconsistent and has no solutions.
b. Incorrect. A system of linear equations with more unknowns than equations is underdetermined and can have either no solutions or an infinite number of solutions.
c. Correct. A matrix can be row-reduced to an echelon form, which is a simpler form that makes it easier to find the solution to the system of linear equations represented by the matrix.
d. Correct. Every matrix can be row-reduced to a unique reduced row echelon form by performing a sequence of elementary row operations, which are reversible and preserve the solutions of the system of linear equations.
e. Correct. Adding a multiple of one row to another row is one type of elementary row operation used in row-reducing a matrix to its reduced row echelon form.
f. Correct. If a system of linear equations has three unknowns and the reduced row echelon form of the augmented matrix has three nonzero rows, then the system is consistent and has a unique solution.
g. Correct. Adding a multiple of one row to another row is one type of elementary row operation used in row-reducing a matrix to its reduced row echelon form.
h. Incorrect. Some of the statements are correct.
Therefore, The answer to all the following options is given above along with the suitable reasoning.
To learn more about linear equations,
brainly.com/question/11897796
#SPJ4
2/9 of the students in a school are in sixth grade.
Type the answers to each question in the boxes below.
a. How many sixth graders are there if the school has 90 students?
b. How many sixth graders are there if the school has 27 students?
c. If the school has a students, write an expression for the number of sixth graders in terms of x.
If 2/9 of the students in a school are in sixth grade.
then 20 students sixth graders are there if the school has 90 students.
6 students sixth graders are there if the school has 90 students
If the school has a students then 2x/9 the number of sixth graders in terms of x.
what are fractions?Part of a full number and a means of dividing a numbers into equal pieces are represented by fractions. The denominator is the total number of components in the whole, while the numerator is the fraction of equal portions being counted.
a. From the details of the question, we have 2/9 of the students in the school in sixth grade. Hence;
Number of students in sixth grade = 2/9 × 90 = 20 sixth grade students
b. If the school has 27 students, number of sixth graders = 2/9 × 27 = 6 sixth grade students
c. If we have x students in the school, the number of sixth graders = 2/9 × x = 2/9x students
To know more about fractions visit:
https://brainly.com/question/10354322
#SPJ1
A box contains 5 plain pencils and 5 pens. A second box contains 3 color pencils and 1 crayon. One item from each box is chosen at random. What is the probability that a plain pencil from the first box and a color pencil from the second box are selected?
The probability that a plain pencil from the first box and a color pencil from the second box are selected is 3/8.
What is the probability?The Probability in mathematics is the possibility of an event in time. In simple words, how many times that incident is happening in any given time interval.
Given:
A box contains 5 plain pencils and 5 pens.
A second box contains 3 color pencils and 1 crayon.
One item from each box is chosen at random.
The probability that a plain pencil from the first box and a color pencil from the second box are selected,
= 5/10 x 3/4
= 3/8
Therefore, the probability is 3/8.
To learn more about the probability;
brainly.com/question/11234923
#SPJ1
Seasons entire family took the train to watch the baseball game. The admission to the game is eight dollars per person. The round-trip price for the train cost $4.50 per person. There are six people and seasons family. Write an expression for the total cost of the outing using parentheses. Use the distributive property to find the cost.
Answer: $75
Step-by-step explanation:
Price for one person: $4.50+$8
Price for six people: 6($4.50+$8)=$75
If ABCD is dilated by a factor of the
coordinate of C' would be:
-4-3-2
A
3
2
B
-10
-1
-2
PT
2
3
4 5
C
D
6
10
11
C' = ([?], [])
Enter
The coordinate of point C' after transformation is; C'(4, 4)
How to interpret Dilation transformation?Dilation is defined as a transformation, that is used to resize the object. Dilation is used to make the objects either larger or smaller. That is a reduction or an enlargement.
Usually when we dilate an object by a scale factor, what we simply do is to multiply the original coordinates by the scale factor to get the new dilated coordinates.
Since the quadrilateral is dilated by a scale factor of 2, we will multiply the original coordinate of point C by 2.
Coordinate of C = (2, 2)
Thus;
Dilated coordinate; C' = (2*2, 2*2) = 4,4
Read more about Dilation Transformation at; https://brainly.com/question/3457976
#SPJ1
True or False : the null space of a is the solution set of the equation ax = 0.
The statement is True: the null space of a is the solution set of the equation ax = 0.
What is null space?The collection of all solutions to the homogeneous equation makes up a matrix's null space. Any matrix's null space contains the zero vector at all times. The null space is denoted as Null A.
We know that The null space of an m × n matrix A, written as Nul A, is the set of all solutions to the homogeneous equation Ax = 0.
Hence, the statement is True: the null space of a is the solution set of the equation ax = 0.
Learn about matrix here:
https://brainly.com/question/28180105
#SPJ4
How can you find the slope of the line that passes through the points (0,0) and (2,4)? Explain
Answer:
2
Step-by-step explanation:
Let ( x1, y1) represent the first point (0,0) and (x2, y2) represent the second point (2,4). Slope (m) (y2 - y1) / ( x2 - x1)= (4 - 0) / (2-0) =2
Giorgi paid 1 GEL and 25 tetris for 5 erasers and 2 rulers, Tornike paid 1 GEL and 5 tetris for 2 erasers and 3 rulers.
Let's say the price of an eraser is x white, the price of a ruler is y white. To find these prices
The requried price of an eraser and ruler is given as 0.15 Tetris and 0.25 Tetris respectively.
What are simultaneous linear equations?Simultaneous linear equations are two- or three-variable linear equations that can be solved together to arrive at a common solution.
1 GEL and 25 tetris = 1.25
1 GEL and 5 tetris = 1.05
We can set up two equations to find the unknown values of x and y:
1.25 = 5x + 2y - - - - - -(1)
1.05 = 2x + 3y - - - - - (2)
To solve the system of equations, we can substitute the value of y in the first equation using the second equation:
y = (1.25 - 5x) / 2
Substituting this value of y in the second equation:
1.05 = 2x + 3((1.25 - 5x) / 2)
x = 0.15
Now,
Put x = 0.15 equation 1,
e get
y = 0.25
Thus, the requried price of an eraser and ruler is given as 0.15 Tetris and 0.25 Tetris respectively.
Learn more about simultaneous equations here:
https://brainly.com/question/16763389
#SPJ1
27. write the following mask in slash notation (/n): a. 255.255.255.0
255.255.255.0 is written as /24 in slash notation (/n).
Slash notation is a compact way to show or write an IPv4 subnet mask. When you use slash notation, you write the IP address, a forward slash (/), and the subnet mask number.
1- To find the subnet mask number:
2- Convert the decimal representation of the subnet mask to a binary representation.
Count each “1” in the subnet mask. The total is the subnet mask number.
In IPv6, slash notation is used to represent the network identifier prefix for an IPv6 network. The prefix is expressed as a slash (/) followed by the prefix size, which is a decimal number between 1 and 128.
Thus, 255.255.255.0 is written as /24 in slash notation (/n).
To know more about slash notation visit: brainly.com/question/5290588
#SPJ4
what is the sum of the expression 3+256
Answer:259
Step-by-step explanation:
3+256=269
Answer: 259
Step-by-step explanation: 3 + 256 = 259
The scale on a map is stated as 1 : 200 000 A main road connects two towns which are 34 kilometres apart. How far will it be on the map, in centimetres, between the two towns along the main road?
On the map, the two towns are 17 centimeters apart.
What is a scale factor?The ratio of the scale of an original thing to a new object that is a representation of it but of a different size is known as a scale factor (bigger or smaller).
Given:
The scale on a map is stated as 1 : 200000.
A main road connects two towns which are 34 kilometers apart.
34 kilometers in centimeters,
= 3400000
So, the road on the map = 3400000/200000
The road on the map = 17 centimeters.
Therefore, the value is 17 centimeters.
To learn more about the scale factor;
https://brainly.com/question/29464385
#SPJ1
5. Angela earns £35 240 a year.
She has to pay income tax.
She is allowed to earn £6475 before paying tax.
She pays 20% tax on the rest.
Her employer deducts the income tax each month.
Work out how much income tax Angela gets deducted each month
£479.42 is the income tax Angela gets deducted each month.
What is percentage?A value or ratio that may be stated as a fraction of 100 is referred to as a percentage in mathematics. If we need to compute a percentage of a number, we should divide it by its whole and then multiply it by 100. The proportion, therefore, refers to a component per hundred. Per 100 is what the term percent signifies. The letter "%" stands for it.
Given, Angela earns £35 240 a year. She has to pay income tax. She is allowed to earn £6475 before paying tax. She pays 20% tax on the rest.
So,
taxable income = 35,240-6,475
taxable income = 28,765
Since She pays 20% tax
Thus,
The Total tax = 28,765 * 20%
the total tax = 5,753
Since Her employer deducts the income tax each month.
so,
Income tax deducted each month = 5,753/12
Income tax deducted each month = 479.417
Therefore, the income tax Angela gets deducted each month is £479.42.
Learn more about percentages here:
https://brainly.com/question/29306119
#SPJ1
An airplane factory made 36 airplanes per month. At this rate, how many airplanes can the factory make per year?
The number of planes manufactured by the aeroplane company will be 432.
What is an expression?The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.
Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.
Given that an aeroplane factory made 36 aeroplanes per month. The number of aeroplanes made in a year will be calculated as:-
Number = 36 x Months in a year
Number = 36 x 12
Number = 432
Therefore, the number of planes will be 432.
To know more about an expression follow
https://brainly.com/question/2680080
#SPJ1
What are Corresponding Angles in Geometry?
The corresponding angles must be equal for the transversal to join two parallel lines.
What is meant by Corresponding Angles?In the intersection of two parallel lines and a transversal, corresponding angles are created. The opening and closing of a lunchbox, completing a Rubik's cube, and endless parallel railroad tracks are a few examples of matching angles in daily life.
The angles in the same corners of two lines, which are typically parallel, are referred to as corresponding angles when they cross each other across a plane (a transversal). In two separate shapes, corresponding sides and angles refer to a pair of matching sides or angles that are in the same location.
Every matching angle is not created equally. The transversal must connect two parallel lines in order for the corresponding angles to be equal. The equivalent angles that are created when a transversal encounters a line that is not parallel are not congruent and have no connection to one another.
To learn more about Corresponding Angles refer to:
https://brainly.com/question/22190474
#SPJ4
Solve the initial value problem. dt/ds = 8 sin2 +[t=π/12] s(0)=2 (Type an exact answer, using à as needed
After integration, the expression will be[tex]S=8(sin^{3}(t+\frac{\pi}{3} )(-cos(t+\frac{\pi}{3}+t^{2}+\frac{\pi}{12t})-8tsin^{2}(t+\frac{\pi}{3})[/tex]
Indicate integrationIntegration is the process of calculating an integral. Integrals are used by mathematicians to compute a range of useful quantities, such as areas, volumes, displacement, etc. Usually, when we talk about integrals, we mean definite integrals. Indefinite integrals are used for antiderivatives. Integration is one of the two primary calculus topics in mathematics, along with differentiation (which measure the rate of change of any function with respect to its variables).
Fundamental IntegralAn integral that has both the upper and lower boundaries is said to be definite. Only a real line may be used for X to lay. A Riemann Integral is another name for the Definite Integral.
∫f(x)dx from a to b.
Indefinite integralThe definition of integrals without upper and lower bounds. It appears as follows:
A definite Integral is represented as:
∫f(x)dx = F(x) + C
Where C is any constant and the function f(x) is called the integrand.
Now,
Right expression is
[tex]\frac{dS}{dt} = 8sin^{2}(t+\frac{\pi}{12} )[/tex]
After integration
[tex]S = 8sin^{2} (t+\frac{\pi}{12} ).dt[/tex]
[tex]S=8(sin^{3}(t+\frac{\pi}{3} )(-cos(t+\frac{\pi}{3}+t^{2}+\frac{\pi}{12t})-8tsin^{2}(t+\frac{\pi}{3})[/tex]
To know more about Integration visit the link
brainly.com/question/18125359?referrer=searchResults
#SPJ4
(2 points) suppose y′=−y t. we write f(t,y) for the right-hand side of the differential equation. (a) determine the isoclines f(t,y)=c for c=−1,0,1. express each answer as y=
For c = 1, we have f(t,y) =-y = 1. Rearranging this equation yields y = 1, which simplifies to y = et. The isoclines for c = -1, 0, 1 are y = e-t, y = 0, and y = et, respectively.
c = -1: y = e-t
c = 0: y = 0
c = 1: y = et
For c = -1, we have f(t,y) = -y = -1. Rearranging this equation yields y = -1, which simplifies to y = e-t.
For c = 0, we have f(t,y) = -y = 0. Rearranging this equation yields y = 0.
For c = 1, we have f(t,y) =-y = 1. Rearranging this equation yields y = 1, which simplifies to y = et.
The isoclines for c = -1, 0, 1 are y = e-t, y = 0, and y = et, respectively.
Learn more about equation here
https://brainly.com/question/29657992
#SPJ4
What are the Types of Corresponding Angles Based on their Sum?
Their total determines which angles are equivalent. Alternative Corresponding Angles Parallel Corresponding angles
What is meant by Corresponding Angles?Whenever a transversal line crosses two parallel lines, corresponding angles are created. Examples of comparable angles that can be found in daily life include the opening and closing of a lunchbox, completing a Rubik's cube, and endless parallel railroad tracks.Corresponding objects are ones that show up at the same location in two related circumstances. In the example below, angles are a common cause. Given that they are in the same spot in the two related shapes, angle A on the left and angle K on the right are equivalent. As we say, A is equivalent to K.Angles that match up are congruent. Corresponding pairs are all angles that are situated in the same location with respect to the parallel and transversal lines.To learn more about Corresponding Angles, refer to:
https://brainly.com/question/22190474
#SPJ4
hey i need this reallly
pls just help me out
Three side lengths of
23, 32, and 45 units will
form exactly one
unique triangle.
No, the length of any pair of sides added together is not necessarily longer than the length of the third side.
Can a triangle be built with the provided side lengths of 23 32 45? No, the length of any pair of sides added together is not necessarily longer than the length of the third side.Triangle Unevenness Theorem.According to the Triangle Inequality Theorem, a triangle can only be formed if its two sides are greater than its third side when added together.If and only if the side lengths a, b, and c fulfill the formula a2 + b2 = c2, a right triangle is formed.We state that a Pythagorean triple exists between these integers.Triangles are singular because you can only ever draw one.There may be more than one triangle obtained if a triangle can be formed by using the two side lengths provided and the angle measure of an omitted angle.
To learn more about triangle refer
https://brainly.com/question/17335144
#SPJ1
It is true three side lengths of 23, 32, and 45 units will form exactly one unique triangle.
How many triangles are possible with three different side lengths?One unique triangle, You create the same triangle again and over again. Therefore, if a triangle can be formed by your three side lengths, it can only be one specific triangle.If you are provided all three sides (Side-Side-Side), two sides and the included angle (Side-Angle-Side), two angles, and the included side, a unique triangle will be created (Angle-Side-Angle)Any two triangles that have the same side dimensions will be congruent, or identical, according to the SSS rule. You may so create a distinctive triangle. But only if the lengths of any two of those sides added together exceed the length of the third side can this occur.The complete question is
Three side lengths of 23, 32, and 45 units will form exactly one unique triangle. true /false.
To learn more about unique triangle refer to:
https://brainly.com/question/30412578
#SPJ1
7(2y)= Complete the tatement uing the pecified property. Aociative Property of Multiplication
The statement using the specified property i.e Associative Property of Multiplication will be 14y.
One's identity property is its capacity for multiplication.
7(2y)
The phrase is given as follows:
7(2y)
=14y
The one has the multiplication property, which says:
Any number or expression that is multiplied by one doesn't alter in any way.
The result is: 1xa=a
The identification property is another name for this particular attribute.
The general rule is shown as follows:
Examples include
1 * 2 = 2
1 * x = x
1 * ab = ab
and so forth
So, the property of multiplying by one is an identity property.
Read more about multiplication properties at:
brainly.com/question/17426365
#SPJ4
Need help ASAP. Congruent Triangles Gina Wilson all things algebra
The answers for all triangle problems are:
x = 2°∠S = 36°x = 26°; ∠P = 116°; ∠Q = 21°; ∠R = 43°∠J = 44°; ∠K = 81°; ∠L = 51°x = 11°; ∠B = 108°; ∠C = ∠D = 36°10. ΔABC is a equilateral triangle, then:
∠A = ∠B = ∠C = 8x - 44
3 (8x - 44) = 180
24x - 132 = 180
24x = 48
x = 2
11. ΔRST is an isosceles triangle, then:
∠R = ∠T
15x - 31 = 9x + 11
6x = 42
x = 7
∠S + ∠R + ∠T = 180°
∠S + 2∠T = 180°
∠S + 2( 9x + 11) = 180°
∠S + 2(9(7) + 11) = 180°
∠S + 2 (63 + 11) = 180°
∠S + 2 (74) = 180°
∠S = 180 - 144
∠S = 36°
12. Based on the given data:
∠P = 5x - 14
∠Q = x - 5
∠R = 2x - 9
Since ΔPQR is a triangle, then:
∠P + ∠Q + ∠R = 180°
(5x - 14) + (x - 5) + (2x - 9) = 180°
8x - 28 = 180°
8x = 208
x = 26
∠P = 5x - 14 --> 5(26) - 14 = 116°
∠Q = x - 5 --> (26) - 5 = 21°
∠R = 2x - 9 --> 2(26) - 9 = 43°
13. ΔJKL is a triangle, where:
∠J = ∠L - 7
∠K = 2∠L - 21
∠J + ∠K + ∠L = 180
(∠L - 7) + (2∠L - 21) + ∠L = 180°
4∠L - 28 = 180°
4∠L = 208
∠L = 51°
∠J = ∠L - 7 --> (51) - 7 = 44°
∠K = 2∠L - 21 --> 2(51) - 21 = 81°
14. In a triangle ΔBCD:
BD = BD
∠B = 13x - 35
∠C = 5x - 19
∠D = 2x + 14
Since BC = BD; then:
∠C = ∠D
5x - 19 = 2x + 14
3x = 33
x = 11
∠C = ∠D = 2x + 14 --> 2(11) + 14 = 36°
∠B + ∠C + ∠D = 180°
∠B + 36° + 36° = 180°
∠B = 108°
Learn more about Triangles here: brainly.com/question/26131452
#SPJ1
When we say ‘the limit does not exist’, do we mean it is actually in a determinate form or it is defined (like it's not something divided by zero)? If not, what is the basic meaning of ‘the limit does not exist’?
The limit does not exist if the graph features a vertical asymptote with one side going toward infinity and the other toward negative infinity.
What is meant by negative infinity?Since the graph is infinitely negative as one approaches zero from either side, the limit as x approaches zero would be negative infinity: In general, the limit will reach infinity or negative infinity when you take a limit and the denominator is equal to zero (depending on the sign of the function). The set of real numbers does not include infinity. The real number set is closed under addition and multiplication, which is one of its axioms. That is, you will always obtain a real number if you add two real numbers together. However, the closure rule is broken by the expressions ∞+(−∞) And ∞×0 for which there is no valid definition.To learn more about negative infinity, refer to:
https://brainly.com/question/30096822
#SPJ4
the type of reasoning used to prove a conjecture is called
Answer:
deductive reasoning
Step-by-step explanation:
a triangular fence is being built to surround a garden. if two of the side lengths must be 4 feet and 12 feet, which inequality could be solved to determine the minimum length of the third side?
The minimum length of the third side must be greater than 16 feet.
The minimum length of the third side can be determined using the Triangle inequality theorem. This theorem states that the sum of any two sides of a triangle must be greater than the length of the third side. The Triangle Inequality Theorem can be expressed by the following inequality: a + b > c, where a, b, and c are the lengths of the three sides of the triangle. In this case, we have two sides of 4 feet and 12 feet, so the inequality can be written as 4 + 12 > c, which simplifies to 16 > c. Solving for c yields c > 16, which means that the minimum length of the third side must be greater than 16 feet.
Learn more about Triangle inequality theorem here:
https://brainly.com/question/1163433
#SPJ4
Jack Pott is paid a straight commission of 6% on his sales. During
February, his sales were $38,000. What was his commission?
Answer:
$2280
Step-by-step explanation:
38000*6% =2280
Find the lengths of the diagonals of rectangle $WXYZ$ . $WY=14x+10$ $XZ=11x+22$
The lengths of the diagonals of rectangle is 66 units
How to determine the valuesThe properties of a rectangle is given as;
A rectangle is a known as a quadrilateralThe opposite sides are parallel and equal to each other Interior angle is equal to 90 degreesSum of all the interior angles is equal to 360 degreesThe diagonals bisect each other at right angleDiagonals have the same lengthFrom the information given, we have that;
$WY=14x+10
$XZ=11x+22
Since the diagonals are of the same length, we have;
WY = XZ
14x + 10 = 11x + 22
collect like terms
14x - 11x = 22 - 10
subtract the like terms
3x = 12
Make 'x' the subject of the formula
x = 4
WY = 54 + 10 = 66
XZ = 66
Hence, the values are 66
Learn about diagonals on:
https://brainly.com/question/26154016
#SPJ1
A scatter plot is shown on the coordinate plane.
Which two points would a line of fit go through to best fit the data?
(1, 10) and (10, 1)
(1, 7) and (2, 6)
(3, 7) and (7, 4)
(3, 8) and (6, 6)
Line of fit go through (1, 10) and (10, 1) to best fit the data.
What is Scatterplots?Scatterplots are the plotting of set of points on a vertical axis and an horizontal axis. The shows the correlation extent between the numbers of the observed quantities.
Line of best fit of the scatterplot should go through as many points as possible of the graph.
If we draw a line passing through the pair of points given in the options, the line passing through (1, 10) and (10, 1) passes through (9, 2), (7, 4) and (3, 8).
No other line drawn through points in the options passes through 5 points.
Hence the line of best fit is the line passing through (1, 10) and (10, 1).
Learn more about Scatterplots here :
https://brainly.com/question/30017616
#SPJ1
Pete is standing 4 feet away from a mirror on the ground. Pete is 6 feet tall and can just see the top of the tree in the mirror from where he is standing. The two triangles formed are similar.
If the mirror is 20 feet away from the base of the tree
A.
22 feet
B.
19 feet
C.
13 feet
D.
30 feet
Pete is standing 4 feet away from a mirror on the ground, if mirror is 20 feet away from the base of the tree the height of tree is 30 feet.
let,
Pete is standing 4 feet away from a mirror on the ground.
Pete is 6 feet tall and can just see the top of the tree in the mirror from where he is standing.
We can say two triangles are formed are similar,
So if the mirror is 20 feet away from the base of the tree
After talkig the similarity theorem we get,
[tex]\frac{6}{4} = \frac{x}{20}[/tex]
So x = 6*5
x = 30 feet.
The height of the mirror is 30 feet.
Height is a measurement of vertical distance, or how high something or someone is (how tall they are) (how "high" a point is).
Learn more about Height:
https://brainly.com/question/27553270
#SPJ4
Select the correct answer. What is the approximate value of the correlation coefficient for the given graph? Graph shows line segment plotted on coordinate plane with number of years on horizontal axis and price of the car in thousand dollars on vertical axis. Line segment begins at (0, 35), goes through (1, 30), (2, 25), (3, 20), (4, 15), (5, 10), (6, 5). A. 1 B. 5 C. 3 D. -1
The approximate value of the correlation coefficient for the given graph is D. -1.
The correlation coefficient is a statistical measure that indicates the strength and direction of the linear relationship between two variables. A correlation coefficient of -1 indicates a perfect negative linear relationship, meaning that as the value of one variable increases, the value of the other variable decreases at a constant rate. In this case, as the number of years increases, the price of the car decreases, so the correlation coefficient is negative.
Train a take 16 hour to reach chicago from wahington while train b take 20 hour, the ratio
Train A takes 20 hours to get to Chicago from Washington whereas Train B takes 16 hours, making a 20: 16 ratio between the two trains.
How to estimate the ratio between the two trains?Given: Time taken by Train A = 16 hours
Time taken by train B = 20 hours
We need to find, the ratios of speeds of trains A and B
The distance exists same (Chicago to Washington) and to finding the speed of train A.
Let the equation be
Speed [tex]$=\frac{\text { Distance }}{\text { time }}$[/tex]
Let the distance between Chicago and Washington be x
Speed [tex]${(\text {train } \mathrm{A})}=\frac{\mathrm{x}}{16} \mathrm{~km} / \mathrm{h}$[/tex]
Hence, speed of train [tex]$A=\frac{x}{16} \mathrm{~km} / \mathrm{h}$[/tex]
To find the speed of train B
Speed [tex]${({train~B})}=\frac{\mathrm{x}}{20} \mathrm{~km} / \mathrm{h}$[/tex]
[tex]$\mathbf{S}_{(\{train~A})}: \mathrm{S}_{(\{train} B)} \\[/tex]
[tex]$& \longrightarrow \frac{\mathrm{x}}{16}: \frac{\mathrm{x}}{20} \\[/tex]
= 20 : 16
Therefore, the ratio of train A and train B be 20 : 16.
The complete question is:
Train a take 16 hour to reach Chicago from Washington while train b take 20 hour, the ratio of the speed of both the train.
To learn more about ratios refer to:
brainly.com/question/12024093
#SPJ4