Answers
Answer:
BC = 1 [tex]\frac{1}{5}[/tex]
Step-by-step explanation:
since the triangles are similar then the ratios of corresponding sides are in proportion, that is
[tex]\frac{BC}{EF}[/tex] = [tex]\frac{AB}{DE}[/tex] ( substitute values )
[tex]\frac{BC}{4}[/tex] = [tex]\frac{\frac{3}{4} }{\frac{5}{2} }[/tex] ( 2 [tex]\frac{1}{2}[/tex] = [tex]\frac{5}{2}[/tex] )
cross- multiply
[tex]\frac{5}{2}[/tex] BC = 4 × [tex]\frac{3}{4}[/tex] = 3 ( multiply both sides by 2 to clear the fraction )
5 BC = 6 ( divide both sides by 5 )
BC = [tex]\frac{6}{5}[/tex] = 1 [tex]\frac{1}{5}[/tex]
Related Questions
Convert the decimal number 431 to binary in two ways: (a) convert directly to binary; (b) convert first to hexadecimal and then from hexadecimal to binary. which method is faster?
Answers
The conversion of decimal number directly to binary number will be faster.
What is a conversion of the number system?The number conversion deals with the operation to change the base of the number.
Binary number - It contains only 2 numbers that are 1 and 0.
Decimal number - It contains 10 numbers that are from 0 to 9.
Hexadecimal number - It contains 16 numbers that are from 0 to F.
Convert the decimal number 431 to binary will be
431 / 2 = 215 with 1 remainder
215 / 2 = 107 with 1 remainder
107 / 2 = 53 with 1 remainder
53 / 2 = 26 with 1 remainder
26 / 2 = 13 with 0 remainder
13 / 2 = 6 with 1 remainder
6 / 2 = 3 with 0 remainder
3 / 2 = 1 with 1 remainder
1 / 2 = 0 with 1 remainder
The decimal number 431 to binary number will be 110101111.
Convert first to hexadecimal and then from hexadecimal to binary. Then we have
(431)₁₀ = (1AF)₁₆ = (110101111)₂
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Please help with the question below 5 points each but beware if you use my points for no reason I'll report you.
Lauren covered the box below with paper, with no overlaps. The paper costs $1.50 per square foot. How much will it cost to cover the box?
rectangular prism measurements
base: 7ft
height: 9ft
width: 2ft
Answers
By finding the surface area of the box, we can see that the cost to cover the box is $285
How much will cost to cover the box?We assume that we need to cover the 6 faces of the box, then we need to find the total surface area.
The surface area is given as:
S = 2( B*H + H*W + B*W)
Where:
B = base = 7ftH = height = 9ftW = width = 2ftThen the surface area is:
S = 2*(7ft*9ft + 7ft*2ft + 9ft*2ft) = 190ft^2
Now we know that the paper costs $1.50 per square foot, then the cost to cover the box is:
cost = 190*$1.50 = $285
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When all quantum numbers are considered, how many different quantum states are there for a hydrogen atom with n=1 ? with n=2 ? with n=3 ? list the quantum numbers of each state.
Answers
Quantum numbers are:
(A) n = 1 ⇒ n -1(B) n = 2 ⇒ n = 2What do we mean by quantum numbers?Quantum numbers are used in quantum physics and chemistry to describe the values of conserved quantities in the dynamics of a quantum system. Quantum numbers are eigenvalues of operators that commute with the Hamiltonian and their corresponding eigenspaces—quantities that can be known with precision at the same time as the system's energy. A specification of all of the quantum numbers of a quantum system, when combined, fully characterizes the system's basis state and can, in theory, be measured together.Quantum numbers:
(A) n = 1
The electron in a hydrogen atom with n=1 is in its ground state; if the electron is in the n=2 orbital, it is in an excited state. For a given n value, the total number of orbitals is n2. Angular Momentum (Secondary, Azimunthal) l = 0,..., n-1 Quantum Number(B) n = 2
The n = 2 states begin to fill up as we move to larger atoms, adding electrons one at a time. Because there are four different values for (l, m), each with two allowed spin states, the n = 2 states can hold up to eight electrons. The n = 2 shell includes all states with a quantum number of n = 2.Therefore, Quantum numbers are:
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A specific atom has 10 protons and 10 neutrons. what is the atom's mass number? 0 0 10 10 20 20 100
Answers
The total number of protons and neutrons in an atom exists directed as the mass number. The atomic mass number of an atom with 10p and 10 n exists 20.
Which atom has 10 protons and 10 neutrons?The total number of protons and neutrons in an atom's nucleus is known as the mass number. Protons plus neutrons equal mass number.
The neon atom has 10 protons and 10 neutrons with the atomic number 10. It has 10 protons and neutrons inside of its nucleus, along with ten electrons outside, due to its atomic weight of 20.179.
Ne is an inert, colorless noble gas that is also the second-lightest of the noble gases. Due to its distinctive reddish glow, it is frequently utilized in lamps and signs.
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I dont understand this
Answers
Line g passes through the points (-2.6,1) and (-1.4,2.5), as shown. Find the equation of the line
that passes through (0, -b) and (c,0).
Answers
The equation of the line that passes through (0,-b) and (c,0) is 7y - 8x = 28
What is the equation of line?The relationship between each x and each matching y is expressed in the equation of a line to produce an ordered pair (x, y) that lies on the line. The equation won't be satisfied by ordered pairs (x, y) that don't lie on the line.
The equation of a line in point-slope form is calculated using the following formula:
y-y₀=m(x-x₀)
where, m is the slope of the line and (x₀, y₀) is any point on the line.
Given data: A line G passes through the points (-2.6,1) and (-1.4,2.5). Let the points (-2.6,1) be (x₀,y₀) and (-1.4,2.5) be (x,y).
Slope of the equation (m)= y-y₀/ (x-x₀)
Slope of the equation (m)=2.5-1/{-1.4-(-2.6)}
Slope of the equation (m)=1.5/(-1.4+2.6)
Slope of the equation (m)=1.5/1.2
Slope of the equation (m)=5/4
Slope of the equation (m)=1.25
The formula y= ax + b can be used to determine the equation of line.
y= 1.25x+b
To find the value of b, let's replace the point (-2.6,1) in the equation above.
1=1.25(-2.6)+b
1=-3.25 +b
b= 1+3.25
b=4.25
let y=0
0=1.25x+4.25
x=-3.4
Therefore, the equation's points are (0,-4.25) and (-3.4,0).
let y = kx+ b
0=k(-3.4)+(-4.25)
k=-1.25
In light of this, the equation for the line through points (0,-4.25) and (-3.4,0) is y=-1.25x-4.25
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Landon is driving to a concert and needs to pay for parking. There is an automatic fee
of $5 just to enter the parking lot, and when he leaves the lot, he will have to pay an
additional $2 for every hour he had his car in the lot. How much total money would
Landon have to pay for parking if he left his car in the lot for 4 hours? How much
would Landon have to pay if he left his car in the lot for t hours?
Answers
If Landon left his automobile alone for 4 hours, he would be charged $13.
If Landon left his car for t hours, he would be charged 5 + 2t.
It is best to create a phrase for such inquiries.
The set cost of the parking fee is $5.
Additionally, it costs $2 each hour.
In other words, if someone uses the parking lot for t hours, they must pay $2 per hour for those t hours.
Formula = 2 x t = 2 t
Including the set amount, the entire phrase is:
5 + 2t
So, if Landon parked for six hours, he would have to pay:
= 5 + 2 t
= 5 + 2 x 4
= $13
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Jane is a sales executive earning a salary of Ksh. 20,000 and a commission of 8% for the sales in exces of Ksh 100,000. If in January 2010 she earned a total of Ksh.48, 000 in salaries and commissions.
a) Determine the amount of sales she made that month
b) If the total sales in the month of February and march increased by 18% and then dropped by 25% respectively, calculate:
i) janes commission in February
ii) Her total earnings in march
Answers
Answer:
a
Step-by-step explanation:
Determine the amount of sales she made that month
a. The total amount of sales is Ksh 450,000
b. Her commission in february is Ksh 34,480
Total earning is Ksh 43,860
How to solve for the valuesa) Jane's total earnings in January were Ksh 48,000, and her base salary is Ksh 20,000. This means that she earned an additional Ksh 28,000 in commissions.
Since her commission rate is 8% for sales in excess of Ksh 100,000, we can calculate the amount of sales she made in January by first calculating the sales over which she got a commission.
Ksh 28,000 is 8% of the sales over Ksh 100,000. So we can set up the following equation and solve for the sales:
0.08 * sales = 28,000
Solving for sales:
sales = 28,000 / 0.08 = Ksh 350,000
Since she only earns a commission on sales in excess of Ksh 100,000, the total amount of sales she made in January would be:
Ksh 100,000 (no commission threshold) + Ksh 350,000 (sales over the threshold) = Ksh 450,000
b) i) If her total sales in February increased by 18%, her sales in February were:
1.18 * Ksh 450,000 = Ksh 531,000
But remember, she only gets a commission on sales over Ksh 100,000. So the sales that will earn a commission in February are:
Ksh 531,000 - Ksh 100,000 = Ksh 431,000
Her commission in February is 8% of this amount:
0.08 * Ksh 431,000 = Ksh 34,480
ii) If her sales in March then dropped by 25%, her sales in March were:
0.75 * Ksh 531,000 = Ksh 398,250
The sales that will earn a commission in March are:
Ksh 398,250 - Ksh 100,000 = Ksh 298,250
Her commission in March is 8% of this amount:
0.08 * Ksh 298,250 = Ksh 23,860
So, her total earnings in March (her base salary plus her commission) would be:
Ksh 20,000 + Ksh 23,860 = Ksh 43,860
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Help me I just want someone to solve this problem and provide a step by step explanation on how you solved it:
a(2x + 3 )=9x + 15 + x
It has to be an a=
Answers
The equation solved in terms of a is 10x + 15/ 2x + 13
What is the subject of formula?The subject of a formula is defined as the variable that is expressed in terms of the other variables in an equation or given expression.
It is also described as the variable that is being worked out in a given equation.
Given the equation;
a(2x + 3) = 9x + 15 + x
collect like terms
a(2x + 3) = 10x + 15
To make 'a' the subject, divide both sides by the coefficient of a which is (2x + 3)
a = 10x + 15/ 2x + 13
Thus, the equation solved in terms of a is 10x + 15/ 2x + 13
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Find the coordinates of the circumcenter of the triangle with the given vertices. Explain.
A(0,0), B(0,6), C(10,0)
Answers
The triangle with vertices A(0 , 0), B(0 , 6), and C(10 , 0) has its circumcenter located at (5 , 3).
Circumcenter of a triangle refers to the point inside a triangle at which the perpendicular bisectors of the sides of a triangle intersect. This point is also equidistant from the three vertices.
Given the location of the three vertices, there are different methods that can be used to locate the circumcenter of the triangle.
First, try to graph and visualize the triangle formed by the three vertices. (see photo)
From there, we can say that triangle ABC is a right-angled triangle with line BC as the hypotenuse.
One of the properties of the circumcenter of a triangle states that the circumcenter lies in the middle of a hypotenuse if it is a right-angled triangle.
To get the circumcenter, find the midpoint of the line BC.
midpoint = M(xm ,ym) = [(x1 + x2)/2 , (y1 + y2)/2]
M(xm ,ym) = [(0 + 10)/2 , (6 + 0)/2]
M(xm ,ym) = (5 , 3)
Hence, the circumcenter is located at (5 , 3).
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Find the 32 nd term of each sequence. 101,105,109,113, ...........
Answers
The arithmetic sequence AP's 32nd term is calculated to be 225.
What is the definition of an AP arithmetic sequence?An arithmetic progression (AP) in mathematics is a list and maybe sequence of numbers with each term is obtained by adding a sequence to the term before it.
With the exception of arithmetic progression, the fixed number is denoted by the letter 'd.'Common difference => d = a2 - a1 = a3 - a2 = a4 - a3 =...... = a - an-1.nth term of an AP: an = a + (n - 1) dThe sum of n terms of an AP's => Sn = n/2(2a+(n-1)d) = n/2(a + l), where l = last term of the AP.Finally, the solution to the question is as follows:
The numbers in the displayed sequence are as follows:
101,105,109,113, ...........
We must explore the 32nd number in the series because it contains 32 terms.
The common difference with both two consecutive terms of an AP which are equal is denoted by 'd.'
Let's assume the first term is'a₁' = 101.
Let's assume 'a₂' = 105 is the second term.
Let's assume the third term is 'a₃' = 109
Substitute the values the preceding equation; the 32nd term is-
d = a₂ - a₁
Obtain the common difference;
d = 105 - 101
d = 4
Put the values in the preceding formula; the 32nd term is
The formula finds the nth term equation;
nth term of an AP: an = a + (n - 1) dTotal number of terms is; n = 32Initial term is a = 101Common difference d = 4Put the given values in nth term formula;
a₃₂ = a + (n - 1) d
a₃₂ = 101 + (32 - 1)(4)
a₃₂ = 101 + 128 - 4
a₃₂ = 225
Thus, the 32nd term value of the arithmetic sequence is calculated to be 225.
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For each rational function, find any points of discontinuity.
y=2 / x+1
Answers
In rational functions, the discontinuities are caused by the denominator terms. Since the denominator of a fraction is non-zero, any term that is multiplied by the denominator is also non-zero.
If x = -1 then x+1 is 0.
So, the discontinuities are shown as x = -1
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The value of a mobile sets of same models in two shapes A and B are given below.
Shop A- Marked price=Rs 25,000, Discount=10%, VAT=13%
Shop B- Marked price=Rs 24,000, Discount=8%, VAT=13%
Which shop is more expensive and by what percent?Find it
Answers
Shop A is more expensive by 1.8 % percentage .
The price displayed on the product label is called the display price or list price. This is the price at which the product will be sold. If discount is offered, M.P. > SP If no discount is offered, M.P. < SP. Discounting is the process of determining the present value of future payments or cash flows to be received. Value Added Tax (VAT) is a consumption tax on goods and services that add value at every stage of the supply chain, from initial production to the point of sale. The amount of VAT paid by the user is based on the cost of the product minus the material costs of the product already taxed in previous stages which is given by [tex]S.P=M.P\times\frac{100-D}{100}[/tex] ....(1)It is given that shop A has Marked price =Rs 25,000, Discount=10%, Putting above values in equation (1) we get
[tex]S.P=25000\times\frac{100-10}{100} \\\\S.P=25000\times\frac{90}{100} \\\\\S.P=22500[/tex]
Rate of VAT 13% is given by
[tex]=\frac{13}{100} \times 22500\\\\=2925[/tex]
The amount to be payed for buying mobile set is [tex]=22500+2925=25425[/tex]
It is given that shop B has Marked price =Rs 24,000, Discount=8%, Putting above values in equation (1) we get
[tex]S.P=24000\times\frac{100-8}{100} \\\\S.P=24000 \times\frac{92}{100} \\\\S.P=22080[/tex]
Rate of VAT 13% [tex]=13\% \ 22080[/tex]
[tex]=\frac{13}{100} \times 22080\\\\=2870.4[/tex]
The amount to be payed for buying mobile set is[tex]=22080+2870.4=24950.4[/tex]
As the amount of shop A is more than shop B so , shop A is more expensive
Percentage [tex]= \frac{25425-24950.4}{25425}\times100[/tex]
[tex]= \frac{474.6}{25425}\times100\\\\=0.01866\times100\\\\=1.8\%[/tex]
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do i set them equal to each other?
Answers
Check out the attached photo
Select all the expressions that have 2/3 as a product.
A 21/25 × 50/63
B 7/8×9/25
C 1/30×2/3
D 3/25×7/12
E 20/27×27/30
Answers
Answer: A and E
Step-by-step explanation:
A. 21/25 × 50/63=
(21*50)/(25*63)=
21/63 * 50/25 =
1/3 * 2 =2/3
B. 7/8×9/25=
(7*9)/(8*25)=
63/200 [tex]\neq[/tex] 2/3
C. 1/30×2/3=
(1*2)/(30*3)=
2/90=
1/45 [tex]\neq[/tex] 2/3
D. 3/25×7/12=
(3*7)/(12*25)=
3/12 * 7/25 =
1/4 * 7/25 =
(1*7)/(4*25)=
7/100 [tex]\neq[/tex] 2/3
E. 20/27×27/30=
(20*27)/(27*30)=
27/27 * 20/30=
1 * 2/3 = 2/3
A and E
The constant of proportionality in an equation can never be 0. True or false?
Answers
Answer:
True
Step-by-step explanation:
a. In the function y=a x²+b x+c, c represents the y -intercept. Find the value of the y -intercept in the function y=a(x-h)²+k .
Answers
Answer:
ah²+k
Step-by-step explanation:
The y-intercept is when x=0.
[tex]y=a(0-h)^2+k=ah^2+k[/tex]
An astronomical unit is the mean distance from the center of Earth to the
center of the sun. One astronomical unit is about 9.3 × 10 miles. Pluto
is about 40 astronomical units from the sun. What is the approximate
distance that Pluto is from the sun?
A. 3.72 × 10 miles
B. 4.30 × 10 miles
C. 3.72 × 10 miles
D. 4.30 × 10 miles
Answers
The approximate distance that Pluto is from the sun will be 3.72 × 10⁹ miles. Then the correct option is A.
What is conversion?Conversion means to convert the same thing into different units.
PEMDAS rule means for the Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This rule is used to solve the equation in a proper and correct manner.
The average distance between the centers of the Earth and the Sun is measured in astronomical units.
We know that One astronomical unit is about 9.3 × 10⁷ miles.
Pluto is about 40 astronomical units from the sun. Then the approximate distance that Pluto is from the sun will be
⇒ 40 × 9.3 × 10⁷
⇒ 372 × 10⁷
⇒ 3.72 × 10⁹ miles
The approximate distance that Pluto is from the sun will be 3.72 × 10⁹ miles. Then the correct option is A.
Your question was incomplete, but the complete question was given below.
An astronomical unit is the mean distance from the center of Earth to the center of the sun. One astronomical unit is about 9.3 × 10⁷ miles. Pluto is about 40 astronomical units from the sun. What is the approximate distance that Pluto is from the sun?
A. 3.72 × 10⁹ miles
B. 4.30 × 10⁹ miles
C. 3.72 × 10⁷ miles
D. 4.30 × 10⁷ miles
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What is the geometric mean of 8 and 22 in simplest form?
A. 4 √11
B. 15
C. 16√11
D. 176
Answers
The geometric mean of 8 and 22 in simplest form is 4√11. The answer is letter A.
Geometric mean, like arithmetic mean, is a kind of average and a measure of central tendency.
To solve for the geometric mean, we multiply the numbers together and then take a square root (for two numbers), cube root (for three numbers) etc. In other words, geometric mean is the nth root of the product of n values.
The formula for the geometric mean is given by:
GM = n√x1 x2 . . . xn
Solving for the geometric mean between 18 and 1.5 using the formula:
GM = n√x1 x2 . . . xn
where n = 2, x1 = 8, and x2 = 22
GM = √(8)(22)
GM = √176
GM = 4√11
Hence, the geometric mean of 8 and 22 is A. 4 √11.
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Thailand is home to numerous indigenous tribes. The Akha tribe population is about 7×104 people, and the Kariang tribe population is 6 times larger. About how many people are in the Kariang tribe?
Answers
The number of people that are in the Kariang tribe is; 420000 people
How to multiply indices?We are given;
Total Population of Akha Tribe in Thailand = 7 * 10⁴ people
Kariang tribe population is a total of 6 times larger than that of Akha Tribe
Thus, for us to be able to get how many people are in the Kariang tribe, we will just multiply both values to get;
6 * 7 * 10⁴ = 42 * 10⁴ = 420000
Therefore, since Thailand is home to numerous indigenous tribes, we can conclude from the calculation above and using the given parameters in the question that the number of people that are in the Kariang tribe is; 420000 people
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Francisco wants to build a cube-shaped storage container that holds 8 cubic feet of water for some goldfish he recently purchased. Using the formula,V=s3, whereVrepresents the volume of the container andsrepresents its side length, find the length of one side of the container.
Answers
Length of Side of cube - shaped storage container is 2 units .
Given : Volume of container = 8 cubic units .
To find : the length of one side of the container .
Formula for volume of cube : Volume of cube = [tex]x^{3}[/tex] .
According to ques .
[tex]x^{3}[/tex] = 8
Solving cubic equation ,
finding cube root of 8 and hence finding value of x .
[tex]\sqrt[3]{8}[/tex] = x
x = 2
2 * 2 * 2 = 8 .
Hence , length of each side of cube - shaped storage container = 2 units .
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A local office supply store charges $18 to set up their business card printing machine with the design and $0.15 in materials per business card to print. Select all equations that could represent an expression for the average cost A(x) of printing a batch of x business cards.
a
b
c
d
e
f
Answers
The equation [tex]A(x)=\frac{18+0.15x}{x}[/tex] represents the correct expression for the Average cost.
What is a mathematical expression?
In mathematics, an expression or mathematical expression is a finite collection of symbols that is well-formed according to context-dependent norms. Mathematical symbols can represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping to aid in determining the sequence of operations and other features of logical grammar.
The store charges $18 for design setting and $0.15 per print out of business card.
Let the number of cards be [tex]x[/tex]
Then, total cost of printing of [tex]x[/tex] cards = $ [tex]0.15x[/tex]
Thus, the expression for the average cost [tex]A(x)[/tex] is given as,
[tex]A(x)=\frac{18+0.15x}{x}[/tex]
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Solve the inequality.
7(x − 3) > −7
Answers
Answer: x>2
Step-by-step explanation:
Answer:
Step-by-step explanation:
Need help finding the SECOND possible solution!!!
Answers
The two possible locations of the point C are (1, 1) and (- 2, - 5).
How to determine the two location of a point within a line based on a given ratio
According to the statement, we find the coordinates of the ends of a line segment and a partition ratio. There are two possible solutions concening the location of the point B:
AC / BC = 4 : 1BC / AC = 4 : 1Thus, we have the corresponding expressions for each case:
Case 1
C(x, y) = A(x, y) + (4 / 5) · [B(x, y) - A(x, y)]
C(x, y) = (- 3, - 7) + (4 / 5) · [(2, 3) - (- 3, - 7)]
C(x, y) = (- 3, - 7) + (4 / 5) · (5, 10)
C(x, y) = (- 3, - 7) + (4, 8)
C(x, y) = (1, 1)
Case 2
C(x, y) = A(x, y) + (1 / 5) · [B(x, y) - A(x, y)]
C(x, y) = (- 3, - 7) + (1 / 5) · [(2, 3) - (- 3, - 7)]
C(x, y) = (- 3, - 7) + (1 / 5) · (5, 10)
C(x, y) = (- 3, - 7) + (1, 2)
C(x, y) = (- 2, - 5)
The two possible locations of the point C are (1, 1) and (- 2, - 5).
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determine the two roots for perfect square 81 show your work
Answers
answer:
9
explanation:
9*9=81
81 sqrt= 9
Jasmine ran for 98.4 minutes. Throughout her run, she ran at a pace of 8.2 minutes per mile.
Answers
Answer: 106.6 is the correct answer
Step-by-step explanation:
urgent please help thank you!
Answers
The difference between the numbers will be:
1. -11.
2. 43
3. -/15
How to illustrate the information?The difference between the numbers will be:
1. (-5) - 6
= -5 - 6
= -11
2. 35 -(-8)
= 35 + 8
= 43
3. 2/5 - 3/5.
= -1/5
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Draw two cards without replacement from a well-shuffled standard deck of 52 cards. find the probability distribution of the number of diamonds drawn. enter exact answers (fractions).
Answers
There are 13 diamonds in the deck (as well as other colors). Since there are 52 cards, the probability of getting a diamond on the first draw is 13/52. After the first card is drawn, all that's left are his 12 diamonds. Therefore, the probability of drawing a diamond is 12/51 (note that he has only 51 cards left after pulling/removing the first card since there are no replacement cards). The overall probability is the product of two possibilities. The odds of drawing diamonds from the original deck are 13/52 times the odds of drawing diamonds from his remaining 51 cards. Assuming the first card drawn is a diamond, 12/51.
P=13/52*12/51=1/4*4/17=1/17.
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23. Find the missing dimensions in the dimension
strings below.
Answers
The dimension of the string is A=13'1".
The dimension of the string is A=19'5",B=1'9" and C=25'5".
1. Given that two strings
In the 1st line given 3'3",5'6",8'9" and 1'4".
In the 2nd line given A and 5'9"
Feet is nothing but there is usually a focus on measuring in feet when working with lumber, pipe, or shingles.
Feet are either denoted with the letter "ft" or an apostrophe (').
Inches are nothing but one foot is twelve inches long. The sign for feet and inches is the same.
A single apostrophe (') is used for feet. A double apostrophe (") is used for inches.
Now, We will add the 1st line given dimension.
That is 3'3"+5'6"+8'9"+1'4"=18'10".
Now the 2nd line will be
A+5'9"=18'10"
A=18'10"-5'9"
A=13'1"
Therefore, the dimension of the string is A=13'1".
2.Given that three strings
In the 1st line given 75'8".
In the 2nd line given A and 56'3".
In the 3rd line given 17'8",B,30'10" and C.
Now, We will add the 2st line given dimensions.
That is A+56'3"=75'8"
A=75'8"-56'3"
A=19'5"
Now the 3nd line will be
B+17'8"=19'5"
B=19'5"-17'8"
B=1'9"
And
30'10"+C=56'3"
C=56'3"-30'10"
C=25'5"
Therefore, the dimension of the string is A=19'5",B=1'9" and C=25'5".
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Find the sum of each finite arithmetic series. 10+20+30+ . . . . . +110+120
Answers
The sum of finite arithmetic series 10+20+30+ . . . . . +110+120 is 780
Suppose we are given an arithmetic series:
a(1) + a(2) + a(3) + ... + a(n)
The sum of the first nth terms is given by:
S(n) = n/2 [a(1) + a(n)]
Where:
a(1) is the first term and a(n) is the nth term.
The given series is:
10+20+30+ . . . . . +110+120
We get, then,
a(1) = 10
a(n) = 120
To find n, recall the formula of the nth term of an arithmetic sequence:
a(n) = a(1) + (n-1) . d
where d is the common difference.
From the given series, we get:
d = 20 - 10 = 10
Substitute a(1) =10, d = 10, and a(n) = 120 into the formula:
120 = 10 + (n-1) . 10
120 = 10 n
n = 12
Substitute n = 12 into the sum formula:
S(n) = n/2 [a(1) + a(n)]
S(12) = 12/2 (10 + 120)
= 6. 130 = 780
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