The number of minute talk's, text message's and picture message's are 128, 72 and 15 respectively.
What is Equation Modelling?Equation modelling is the process of writing a mathematical verbal expression in the form of a mathematical expression for correct analysis, observations and results of the given problem.
We have Enrique who has a pay-per-use plan on his cell phone. It costs $0.10 per minute talk, $0.20 per text message, and $0.25 per picture message. His total bill last month was $30.95. The total number of text and picture messages sent was 87. The cost for the use of minutes was $1.60 less than the cost of the text messages
Assume that [x], [y] and [z] represents the number of minute talk's, text message's and picture message's respectively. Then -
0.1x + 0.2y + 0.25z = 30.95 ..[1]
y + z = 87 ..[2]
0.1x = 0.2y - 1.6 ...[3]
We can write Eq[1] as -
0.2y - 1.6 + 0.2y + 0.25z = 30.95
z = 87 - y
0.2y - 1.6 + 0.2y + 0.25(87 - y) = 30.95
Solving, we get y = 72.
So z = 87 - 72 = 15
and
0.1x = 0.2 x 72 - 1.6
0.1x = 14.4 - 1.6
x = 128
Therefore, the number of minute talk's, text message's and picture message's are 128, 72 and 15 respectively.
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The price of a new car was £12,500
It is reduced to £11,625
Work out the percentage reduction.
well, the reduction in value is £12500 - £11625 = £875.
if we take 12500 to be the 100%, what is 875 off of it in percentage?
[tex]\begin{array}{ccll} amount&\%\\ \cline{1-2} 12500 & 100\\ 875& x \end{array} \implies \cfrac{12500}{875}~~=~~\cfrac{100}{x} \\\\\\ \cfrac{100}{7}=\cfrac{100}{x}\implies 100x=700\implies x=\cfrac{700}{100}\implies x=7[/tex]
Answer: El porcentaje de reducción exacto es de: 7%, con esto el precio de descuento es de €875.
Which symbol correctly compares the fractions below?
2/3 ? 6/9
A. >
B. none of these are correct
C. =
D.
Answer:
C
Step-by-step explanation:
6/9 simplified is 2/3
Hope this helps
The current on the Little River is 8 mph. Tom's
boat goes 15 mph in still water. How far upstream
can Tom's boat go on the Little River in 1.5 hours?
a) 12 miles
b) 25 miles
c) 10.5 miles
d) 34.5 miles
10.5 miles far upstream can Tom's boat go on the Little River in 1.5 hours.
How to calculate the relative velocity ?The relative velocity formula is written as follows. V is equal to
V → = V A B → + V B C →
Where. VAB is the velocity in relation to A and B, VBC is the velocity in relation to B and C, and VAC is the velocity in relation to A and C.
The current on the Little River is 8 mph.
Tom's boat goes 15 mph in still water.
For Upstream
the Velocity of the boat = 15 mph - 8mph
= 7mph
How far upstream
can Tom's boat go on the Little River in 1.5 hours = 7* 1.5 = 10.5 miles
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According to the questions that are asked in the various Government exams that are held across the nation, the boat and stream concept is one of the most frequently covered subjects.
How to calculate Boat and Stream?The four terms that a candidate has to comprehend in order to grasp the notion of streams are listed below.Stream: A river's flowing water is referred to as a stream.Upstream - A boat is said to be moving upstream if it is moving downstream of the stream. The boat's upstream speed in this situation is its net speed.Downstream - A boat is said to be moving downstream if it is moving in the same direction as the stream. In this instance, the boat's downstream speed is its net speed.Still Water - In this situation, the water is seen as being immobile and has no speed.The main focus of this topic is determining the speed of anything moving through water, whether it is moving with the current or against it.For example : In one hour, a boat goes 13 km/hr in the direction of the stream and 7 km/hr against the direction of the stream. What will be the speed of the boat in still water?Utilizing the formula,Boat speed in still water = 1/2 (downstream speed + upstream speed).
Boat's speed in still water equals 1/2 (13+7) = 1/2 × 20 = 10 km/hr.
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a.
Lesson 2.16 Practice Problems
There are many cylinders with a volume of 1447 cubic inches. The height h(r) in
inches of one of these cylinders is a function of its radius r in inches where h(r) =
b.
What is the height of one of these cylinders if its radius is 2 inches?
What is the height of one of these cylinders if its radius is 3 inches?
What is the height of one of these cylinders if its radius is 6 inches?
144
1) The height of one of these cylinders if its radius is 2 inches is
115.207 inches.
2) The height of one of these cylinders if its radius is 3 inches is
51.203 inches.
3) The height of one of these cylinders if its radius is 6 inches is
12.800 inches.
VOLUME OF CYLINDER = πr²h = 1447 cubic inches1) when radius is 2 inches then:
πr²h = 1447
h = 1447/ (3.14 x 2²) = 115.207 inches
2)when radius is 3 inches then:
πr²h = 1447
h = 1447/ (3.14 x 9²) = 51.202 inches
3) when radius is 6 inches then:
πr²h = 1447
h = 1447/ (3.14 x {36}²) = 12.800 inches
1) The height of one of these cylinders if its radius is 2 inches is
115.207 inches.
2) The height of one of these cylinders if its radius is 3 inches is
51.203 inches.
3) The height of one of these cylinders if its radius is 6 inches is
12.800 inches.
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Write as a single fraction in its lowest terms: 3(2x-1)/5 -2 (4x -2)/2
The single fraction in its lowest terms will be;
⇒ - 7(2x - 1)/2
What is mean by Fraction?
A fraction is a part of whole number, and a way to split up a number into equal parts.
Or, A number which is expressed as a quotient is called fraction.
It can be written as the form of p : q, which is equivalent to p / q.
Given that;
The fraction is,
⇒ 3 (2x - 1)/5 - 2 (4x - 2)/2
Now,
Solve the fraction as;
The fraction is,
⇒ 3 (2x - 1)/5 - 2 (4x - 2)/2
⇒ 3 (2x - 1)/5 - (4x - 2)
⇒ 3 (2x - 1)/5 - 2 (2x - 1)
⇒ (2x - 1) (3/5 - 2)
⇒ (2x - 1) (3 - 10)/2
⇒ (2x - 1) (- 7/2)
⇒ - 7(2x - 1)/2
Thus, The single fraction in its lowest terms will be;
⇒ - 7(2x - 1)/2
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A party rental company has chairs and tables for rent. The total cost to rent 12 chairs and 2 tables is $35. The total cost to rent 3 chairs
and 5 tables is $47. What is the cost to rent each chair and each table?
The cost to rent chair is $1.5 and table is $8.5 .
In the question ,
it is given that
the cost to rent 12 chairs and 2 tables [tex]=[/tex] $35
and the cost to rent 3 chairs and 5 tables [tex]=[/tex] $47
let the cost for 1 chair ne "c"
and let the cost for 1 table = "t"
So , according to the question ,
the equations are
12c + 2t = 35 ....equation(1)
3c + 5t = 47 ....equation (2)
On multiply equation (2) by 4 and then subtracting equation (1) from it ,
we get
(12c + 20t) - (12c + 2t) = 188 - 35
12c + 20t - 12c -2t = 153
18t = 153
t = 153/18
t = 8.5
and 12c + 2(8.5) = 35
12c + 17 = 35
12c = 18
c = 18/12
c = 1.5
Therefore , The cost to rent chair is $1.5 and table is $8.5 .
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Chang will run at least 21 miles this week. So far, he has run 12 miles. What are the possible numbers of additional miles he will run?
Use t for the number of additional miles he will run.
Write your answer as an inequality solved for t.
Using an inequality to represent the problem, Chang must run at least an additional 9 miles or greater than 9 miles
What is an InequalityIn Mathematics, the relationship between two values that are not equal is defined by inequalities. Inequality means not equal. Generally, if two values are not equal, we use “not equal symbol (≠)”. But to compare the values, whether it is less than or greater than, different inequalities are used.
To find the number of additional miles he will run, let's set the unknown number equals t
12 + t > 21
t > 21 - 12
t >9
Chang will need to run at least 9 miles
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8. ¿Cuántos cuadriláteros se pueden formar con los vértices de un pentágono regular?
The number of quadrilaterals that can be formed with the vertices of a regular pentagon is given by:
5.
How to obtain the number of quadrilaterals?The number of vertices for each polygon is given as follows:
Quadrilateral: 4 vertices.Pentagon: 5 vertices.Hence, to build the quadrilaterals, four vertices are taken from the set of five vertices of the pentagon.
The formula to be used is given as follows:
Permutation formula -> order of the vertices is not relevant.Combination formula -> order of the vertices relevant.The order of the vertices is not relevant, hence the combination formula is used, given as follows:
[tex]C_{n,x} = \frac{n!}{x!(n - x)!}[/tex]
Which gives the number of different combinations of x elements from a set of n elements.
Hence, in the context of this problem, the number of quadrilaterals is obtained as follows:
[tex]C_{5,4} = \frac{5!}{4!1!} = 5[/tex]
Translation
The problem asks for how many quadrilaterals can be formed with the vertices of a regular pentagon.
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help me out thanks 10 ponits
Answer:
yes yes ...................
How many 3/16-yard pies can be cut from 3/4 yard of ribbion?
The number of 3 / 16 yards pieces that can be cut from 3 / 4 yard of ribbon is 4.
How to find how many pieces of ribbon that can be cut?The actual length of the ribbon is 3 / 4 yards.
He wants to cut 3 / 16 yards pieces from the actual length of the ribbon.
Therefore, the number of 3 / 16 yard that can be cut from 3 / 4 yard of ribbon can be calculated as follows;
number of pieces of ribbon = 3 / 4 ÷ 3 / 16
number of pieces of ribbon = 3 / 4 × 16 / 3
number of pieces of ribbon = 48 / 12
Therefore,
number of pieces of ribbon = 4 yards
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In the triangle below, with right angle I, suppose that m< J= (2x+22)° and m < K = (5x-2)
Find the degree measure of each angle in the triangle.
m < I =
M< J =
m < K =
Answer:
Step-by-step explanation
so basically you need to see what m<I equals and do the same for the rest of them and you should get your answer and that would be let me see and m<k= -44 degrees and m<I and J= -10 degrees and there you have if this is not right i tried have the same step and ask another person
Ann’s bakery bakes 450 loaves of bread in 3 days marks bakery 560 loaves of bread in 4 days which bakery bakes bread at faster rate
Answer: Marks bakery
Step-by-step explanation:
divide 450 by 3 = 150 loaves of bread Ann baked per day
divide 560 by 4= 140 loaves of bread Mark bakes per day
Thus Marks bakery bakes bread at a faster rate.
Divide 647,457 by 325,712,318
Simon invests $7000 into an account that earns 0.4% simple interest annually.
Which statement best describes the relationship between the number of years Simon has his money invested and the account balance in any year?
1:
The relationship is linear. His account increases each year by a constant value of $280.
2:The relationship is exponential. The ratio of his account balance any year to the previous year is 1.004.
3:The relationship is exponential. The ratio of his account balance any year to the previous year is 0.004.
4:The relationship is linear. His account increases each year by a constant value of $28.
The relationship is linear. His account increases each year by a constant value of $28.
The relationship between the number of years that Simon's money is invested and the account balance can be described as 4:The relationship is linear. His account increases each year by a constant value of $28.
How to find the relationship between variables?The simple interest due to Simon's account every year is:
= Simple interest rate x Amount invested
= 0.4% x 7, 000
= $28
This means that every year, Simon's account would increase by a value of $28.
This represents a linear relationship because in linear relationships, the value of the variables increases by a constant amount each year or period.
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The polynomial P(x) of degree 4 has
a root of multiplicity 2 at x = 4
• a root of multiplicity 1 at x = 0 and at x = -1
• It goes through the point (5,21)
Find a formula for P(x).
P(x) =
Question Help: Message instructor
Answer:
P(x) = 0.7 [tex]x^{4}[/tex] - 4.9x³ + 5.6x² + 11.2x
Step-by-step explanation:
given a polynomial with roots x = a and x = b , then the factors are
(x - a) and (x - b)
If x = a is of multiplicity 2 then factor is (x - a)²
the polynomial is then the product of the factors
p(x) = a(x - a)(x - b) ← a is a multiplier
give x = 4 is a root with multiplicity 2 then (x - 4)² is the factor
x = 0 has factor (x - 0) , that is x
x = - 1 has factor (x - (- 1)) , that is (x + 1)
the polynomial is then the product of the factors
P(x) = ax(x + 1)(x - 4)² ← expand squared factor using FOIL
= ax(x + 1)(x² - 8x + 16)
= a(x² + x)(x² - 8x + 16) ← distribute
= a([tex]x^{4}[/tex] - 8x³ + 16x² + x³ - 8x² + 16x)
= a([tex]x^{4}[/tex] - 7x³ + 8x² + 16x)
to find a substitute (5, 21 ) into P(x)
21 = a([tex]5^{4}[/tex] - 7(5)³ + 8(5)² + 16(5))
21 = a(625 - 875 + 200 + 80)
21 = 30a ( divide both sides by 30 )
0.7 = a
then
P(x) = 0.7([tex]x^{4}[/tex] - 7x³ + 8x² + 16x) ← distribute parenthesis
P(x) = 0.7[tex]x^{4}[/tex] - 4.9x³ + 5.6x² + 11.2x
How can I find the scale factor of the two similar triangles and how can I use similarity and scale factor to find the length?
Answer:
i think, x equal 12 and y equal 20
Select the equations of the line that goes through the point 6,-2 and is perpindicular to the line y+2=-2/5(x-10) .
A. y=-2/5x+2
B. y=5/2x-17
C. 5x-2y=34
D. 2x+5y=2
E. y+2=-2/5(x-6)
F. y+2=5/2(x-6)
y + 2 = 5/2 (x - 6) ; 5x-2y=34 ; y=5/2x-17 is the equations of the line that goes through the point (6,-2) and is perpendicular to the line y+2=-2/5(x-10), Hence the correct options are B, C and F.
What is equation of the line?The standard forms of the equation of a line are:
Slope-intercept form:
y = mx + c
Where m indicates the slope of the line and c is the y-intercept
Intercept form:
x/a + y/b = 1
General form of the equation of the straight line, i.e. Ax+By+C = 0
x/(-C/A) + y/(-C/B) = 1
where a = -C/A and b = – C/B
Normal form:
The equation of the line whose length of the normal from the origin is p and the angle made by the normal with the positive x-axis is given by α is given by:
x cos α+y sin α = p
Given,
Point = (6,-2) = (x2,y2)
Equation of line = y+2=-2/5(x-10)
General equation of the line = y - y1 = m ( x-x1 )
After comparing we get,
Slope of the given line = -2/5
As we know both the lines are perpendicular to each other so, product of their slopes must be equal to -1.
m1 × m2 = -1
-2/5 × m2 = -1
We get m2 = 5/2
So the equation of the line having slope 5/2 and passing through (6,-2) is:
y - y2 = m2 ( x-x2 )
y -(-2) = 5/2 (x - 6)
y + 2 = 5/2 (x - 6)
Hence, we get equation of the line as y + 2 = 5/2 (x - 6) .
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A city block is 3 times as long as it is wide. If the distance around the city block is 16.8 kilometers, what is the area of the city block?
The area of the city block is 13.23 kilometers².
How to calculate the area?The city block is 3 times as long as it is wide. In this case, the width can be represented by w. The length will be 3w.
Therefore, perimeter will be:
= 2(length + width)
= 2(3w + w) = 16.8
8w = 16.8
Divide
w = 16.8 / 8
w = 2.1
Length = 3w = 3 × 2.1 = 6.3km
The area will be:
= Length × Width
= 6.3 × 2.1
= 13.23km²
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Answer:
The area of the city block is 13.23 kilometers².
Step-by-step explanation:
Please help! I will award top rating for the first to help! (the questions are on the image)
It needs to be fully simplified!
Answer:
Step-by-step explanation:
4x(power of 5) divided by x(power of 2)
5y(po7) div by y(po2)
not 100% sure as i havent learnt this before lol
find the horizontal asymptote
The horizontal asymptote is y = [tex]\frac{9}{4}[/tex].
Let f(x) = [tex]\frac{9x^{3}-5x-9}{4x^{3}-9x+4}[/tex]
Line y = L is a horizontal asymptote of the function y=f(x), if either [tex]\lim_{x \to \infty} f(x) = L[/tex] or, [tex]\lim_{x \to -\infty} f(x) =L[/tex] and L is finite.
We will calculate limits :
[tex]\lim_{x \to \infty}(\frac{9x^{3}-5x-9}{4x^{3}-9x+4}) = \frac{9}{4}[/tex]
[tex]\lim_{x \to -\infty}(\frac{9x^{3}-5x-9}{4x^{3}-9x+4}) = \frac{9}{4}[/tex]
Hence, horizontal asymptote is y = [tex]\frac{9}{4}[/tex].
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When five times a number is decreased by 9 , the result is 26 . What is the number?
Answer:
5x-9=26
Step-by-step explanation:
5x=35
5 5
x = 7
mark me on brainliest please follow me to
Answer:
x = 7
Step-by-step explanation:
When five times a number is decreased by 9 , the result is 26 . What is the number?
5x - 9 = 26
add 9 to both sides:
5x - 9 + 9 = 26 + 9
5x =35
divide both sides by 5:
5x/5 =35/5
x = 7
4x/3 -x=x/15-12/5 x =??????????
3.) Johannes sold an order of 3 Strawberry pies
for $12.50 each. She paid her assistant
$1.10 for each Strawberrye pie sold. How much
money did Johannesearn from the pies sold?
Answer:
$34.20
Step-by-step explanation:
Since each pie is $12.50 but the assistant gets $1.10 for each pie, Johannes will get $11.40 for each pie sold.
We know that there were 3 pies sold so you must solve the equation below
11.40*3
The answer is $34.20
in 2017, a journal reported on trends in sugar-sweetened beverage (SSB) consumption. A random sample of youths aged 12 to 19 years old were asked to monitor all food and beverages consumed in a 24-hour period. The study was done in 2005 and repeated in 2014. The numbers who consumed a sugary beverage such as soda or fruit juice in a day are shown in the accompanying table
The 95% confidence interval for the distribution of the difference of proportions, using the z-distribution, is given as follows:
(0.11, 0.146).
How to find the confidence interval for the difference of proportions?The first step is finding the proportion and standard error for each sample, as follows:
2005: [tex]n = 3486 + 2248 = 5734, p_1 = \frac{3486}{5734} = 0.608, s_1 = \sqrt{\frac{0.608(0.392)}{5734}} = 0.0064[/tex]2014: [tex]n = 2754 + 2980 = 5734, p_2 = \frac{2754}{5734} = 0.48, s_2 = \sqrt{\frac{0.48(0.52)}{5734}} = 0.0066[/tex]For the distribution of differences, the mean and the standard error are given as follows:
p = 0.608 - 0.48 = 0.128.s = sqrt(0.0064² + 0.0066²) = 0.0092.The z-distribution is used as we are working with proportions, hence the bounds of the interval are given as follows:
p ± zs.
The critical value for a 95% confidence interval with the z-distribution is of z = 1.96.
Hence the lower bound of the interval is:
0.128 - 1.96 x 0.0092 = 0.11.
The upper bound of the interval is:
0.128 + 1.96 x 0.0092 = 0.146.
What is the missing information?
The information regarding each sample is given by the image at the end of the answer, and the problem asks for the 95% confidence interval for the differences.
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What is the y-intercept of this line?
Answer:
The Y intercept of this line is -3.
Step-by-step explanation:
The X intercept of the crossing line is about -1.4.
On finding the Y intercept:
Step 1: look at the vertical black line (Y Axis)
Step 2: Locate where the blue line crosses on this line.
Step 3: graph Y function of the point as your answer.
Hope this helped a bunch!
Have a great day!
- Kit-Kat~
Determine when the function is positive, negative, increasing, or decreasing.
The function is positive and increasing from 0 to 2.5, at negative and decreasing from 0 to -2.5, respectively.
How to find returns to scale?
Returns to scale involves an increase in an output more than when all the inputs increase proportionately.
Using the graph, there is a line segment from the origin to a point. at the middle of the third block making 2.5. this shows an increase which is positive and on the other hand, there is a line segment from the origin towards left hand side on the number line showing a decrease and a negative from 0 to -2.5.
In conclusion, the line pointing upwards towards right hand side shows both positive and increase while the line pointing leftward shows decrease and negative.
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Suppose a large consignment of compact discs contained 13% defectives.
If a sample of size 329 is selected, what is the probability that the sample proportion will differ from the population proportion by more than 3%? Round your answer to four decimal places.
The probability that the sample proportion will differ from the population proportion by more than 3% is 0.8948
How to calculate the probability?The requirement to solve the probability between z-values is to know that the probability between the z-values is the difference between the probability of the greatest z-value and the lowest z-value.
In this case, the sample proportion:
= ✓[p(1 - p)/n]
= ✓(0.13 × 0.87)/329
= 0.01854.
The probability will be:
P(-0.03 / 0.01854) < z < (0.03 / 0.01854)
P(-1.62 < z < 1.62)
Looking at the z table, the probability is 0.08948
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The table shows a proportional relationship. x 14 6 26 y 7 3 13 Describe what the graph of the proportional relationship would look like. A line passes through the point (0, 0) and continues through the point (7, 14). A line passes through the point (0, 0) and continues through the point (14, 7). A line passes through the point (0, 0) and continues through the point (3, 6). A line passes through the point (0, 0) and continues through the point (13, 26).
The graph of this proportional relationship would look like this: A line passes through the point (0, 0) and continues through the point (14, 7).
What is a graph?In Mathematics, a graph simply refers a type of chart that is typically used to graphically represent data points on both the horizontal and vertical lines of a cartesian coordinate, which are the x-coordinate (x-axis) and y-coordinate (y-axis).
Generally speaking, the graph of any proportional relationship is always characterized by a straight line with the data points passing through the origin (0, 0) because as the values on the x-coordinate (x-axis) increases or decreases, the values on the y-coordinate (y-axis) increases or decreases simultaneously.
By critically observing graph of this proportional relationship (see attachment), we can logically deduce that it passes through both points (0, 0) and (14, 7).
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.......................................
Answer:
c is ur answer
I hope it's help◉‿◉
Are the figures congruent?
Yes these triangles are congruent.
What is congruent triangles?
Two triangles live aforesaid to be congruent if all 3 corresponding sides are equal and every one the 3 corresponding angles are equal in measure. These triangles may be slides, rotated, flipped and turned to be looked identical. If repositioned, they coincide with one another. The image of congruousness is’ ≅’.
Main body:
Firstly we need to find the co-ordinates of each point.
M = (-1,5) R= (1,1)
L = (-2,2) S= (-5,-1)
N= (5,3) Q= (2,-2)
to prove these triangles are congruent we need to show that the distance of their sides are equal.
distance formula= [tex]\sqrt{(x1-x2)^2+(y1- y2)^{2}[/tex]
Now in ΔLMN =
ML = [tex]\sqrt{(-1+2)^{2}+(5-2)^{2} }[/tex]
ML= [tex]\sqrt{10}[/tex] units
LN =[tex]\sqrt{(5+2)^{2}+(3-2)^{2} }[/tex]
LN= [tex]\sqrt{50}[/tex] units
MN =[tex]\sqrt{(5+1)^{2}+(3-5)^{2} }[/tex]
MN=[tex]\sqrt{40}[/tex] units
Now in ΔQRS=
RS= [tex]\sqrt{(1+5)^{2}+(1+1)^{2} }[/tex]
RS = [tex]\sqrt{40}[/tex] units
SQ = [tex]\sqrt{(2+5)^{2}+(1-2)^{2} }[/tex]
SQ = [tex]\sqrt{50}[/tex] units
RQ = [tex]\sqrt{(1-2)^{2}+(1+2)^{2} }[/tex]
RQ = [tex]\sqrt{10}[/tex] units.
We can clearly see on side of each triangle is equal to one side of another one.
Hence ΔLMN≅ΔQRS.
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