The function f(x)=√x with f:R→R is injective and surjective but not bijective.
Injective (or one-to-one): f(x) is injective, which means that if f(x1) = f(x2), then x1 = x2. In other words, if the square root of x1 is equal to the square root of x2, then x1 and x2 are equal.
Surjective (or onto): f(x) is surjective, which means that for every y in the codomain (R), there exists an x in the domain (R) such that f(x) = y. In other words, the square root of any real number can always be expressed as a real number.
Bijective: f(x) is not bijective. The square root function is not bijective because it is not defined for negative values of x.
Function: A function f is a function if for every x in the domain of f, there is exactly one y in the codomain of f such that f(x) = y. In other words, each x in the domain is mapped to exactly one y in the codomain.
In the case of f(x) = √x, it is a function. For every x in the domain of f, which is [0,∞), there is exactly one y in the codomain of f, which is [0,∞), such that f(x) = y.
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what is the unsigned decimal equivalent (with 5 digits after the decimal point, truncated, e.g., 12.34567) of the following unsigned base 7 value? 1101.011
The decimal equivalent of 1101.011 in base 7 is 343.14300.
The decimal system is a base 10 numbering system that is widely used in everyday life.
To convert 1101.011 from base 7 to decimal, we need to start by converting the whole number portion of the value. 1101 in base 7 is equivalent to
=> 1 x 7³ + 1 x 7² + 0 x 7¹ + 1 x 7⁰ = 343
Next, we need to convert the fractional portion of the value. The fraction 0.011 in base 7 is equivalent to
=> 0 x 7⁻¹ + 1 x 7⁻² + 1 x 7⁻³ = 0.143
Finally, we add the decimal equivalent of the whole number portion and the fractional portion to find the decimal equivalent of 1101.011 in base 7.
=> 343 + 0.143 = 343.143,
which is the decimal equivalent of 1101.011 in base 7.
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Bookwork code: M47
to task
Give your answer in the form y = mx + c, where m and c are integers or
fractions in their simplest forms.
5432
2-
1-
=52
-8-7-6-5-4-3-2-1.01
B2
+2+
-3-
-4-
--5-
Calculator
not allowed
2 3 4 5 6 7 8
Watch video
Line A
I
A
The linear equation of line will be y=4/7x-6/7.
What is a linear equation ?
A linear equation is an equation in which the highest power of the variable is always 1. It is also known as a one-degree equation. The standard form of a linear equation in one variable is of the form
Ax + B = 0
e.g. x-10=0. Here, x is a variable, A is a coefficient and B is constant.
The standard form of a linear equation in two variables is of the form
Ax + By = C
e.g. 2x-4y=10. Here, x and y are variables, A and B are coefficients and C is a constant.
Now,
From graph take two point on line
(x1,y1),(x2,y2)=(5,2)(-2,-2)
As standard equation of a line is y=mx+c
where m=slope and c=constant
m=(y2-y1)/(x2-x1)
m=(-2-2)/(-2-5)=4/7
then equation of line will be
y-y1=4/7(x-x1)
y-2=4/7(x-5)
y=4/7x-20/7
Hence,
The linear equation of line will be y=4/7x-6/7 in form of y=mx+c.
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I can’t find the answer
what is volume of the figure in cubic feet? A. 136 cubic feet B. 6,144 cubic feet C. 9,600 cubic feet D. 11,520 cubic feet
The box should have inches for its length, width, and height. 2. Divide the result of multiplying the length, breadth, and height by 1,728. In cubic feet, this represents the container's volume.
How do you figure out volume in cubic feet?As such, it is listed here for documents that can simply be destroyed.
1 cubic foot equals a WPS Records Retention box.1 cubic foot equals 1 drawer in a typical filing cabinet.Box of copy paper (10 ream box) equals one cubic foot.5 Reams of Copy Paper =.5 Cubic FeetThe instructions below can be used to calculate a container's cubic foot volume.
Determine the box's inches-long dimensions for width, height, and depth.Divide the result of multiplying the length, breadth, and height by 1,728.In cubic feet, this represents the container's volume.
A case in point
18"L x 11.5"W x 9"H = 1,863 cubic inches
1,863/1,728 equals 1.078 cubic feet.
The aforementioned container has a volume of 1.1 cubic feet (round to the nearest tenth).
The Complete Question.
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Finn owe hi mom $77. He cook meal and get paid $5 per meal. Which linear equation could Finn ue to determine y, the total amount of money that he ha after cooking x amount of meal
The linear equation for this scenario could be: y = 5x + 77, where y represents the total amount of money Finn has after cooking x number of meals and 77 is the initial amount owed to his mom.
A linear equation is an algebraic equation with simply a constant and a first-order (linear) component of the form y=mx+b, where m is the slope and b is the y-intercept. The above is sometimes referred to as a "linear equation with two variables," where y and x are the variables.
Ax+By=C is the typical form for linear equations in two variables. 2x+3y=5, for example, is a simple linear equation. It is rather simple to get both intercepts when an equation is stated in this way (x and y).
As per the data given,
The total amount Finn has = $ 77.
Amount spent on meal = $5 per meal.
Total number of meal = x
So, the amount spent on taking x meal will be = 5*x = 5x
Hence, the required linear equation will be: y = 5x + 77
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has been hired to build a wooden fence. He plans to use a post hole digger to o the holes for the posts. Because of the type of soil, Levi only starts the holes, fills them with water, and then plans to return the next day to finish the job. When Levi begins the next day, each hole is 3 inches deep. Each time he uses the post hole digger, he removes 2 inches of soils
Number of Excavation Height of Soils(inches)
0 3 ins
1 5 ins
5 13 ins
10 23 ins
What are Word Problems ?A word problem is a type of mathematics exercise where the majority of the issue's context is supplied in spoken language as opposed to mathematical notation.
A math word problem is a question that is phrased as one or more sentences and asks students to use their mathematical understanding to solve an issue from "real world."
In order for kids to understand the word problem, they must be familiar with the terminology that goes along with the mathematical symbols that they are used to.
It is already noted that when Levi starts digging the hole is already 3 inches dip with soil
In each excavation he digs 2 inches of soil each
So, when number of Excavation is :
Zero : the inches of soil is 3 inches
One : the inches of soil is 3+2 = 5 inches
Five : the inches of soil is 3+2*5 = 13 inches
Ten :the inches of soil is 3 + 2*10 = 23 inches
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Amy will pend le than $32 on gift. So far, he ha pent $17. What are the poible additional amount he will pend?
The possible additional amount he will spend more than 15.
An inequality is a relationship that denotes a non-equal comparison between two numbers or mathematical expressions.
According to the question,
Let Amy, will spend $c additional amount.
Amy will spend more than $32 on gifts.
He spent $17.
We solved this question by using inequality.
The inequality equation is:
c + 1 7 > 32
c > 32 -17 ( by changing the sign)
C > 15
So, the possible additional amount he will spend more than 15.
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Draw a triangle ABC if BC = 8 cm, ∠B = 60°and ∠C = 70°
Answer:
If angle B is 60 and angle C is 70, We can make an equation by:
180 - (60+70)
The answer for this equation will be 50.
According to the upper equation, angle A is 50, angle B is 60, and angle C is 70.
The stopping distance (at some fixed speed) of regular tires on glare ice is a function of the air temperature F, in degrees Fahrenheit. This function is estimated by D(F) = 2F+115, where D(F) is the stopping distance, in feet, when the air temperature is F, in degrees Fahrenheit. (a) Find D(0degrees), D(-20degrees), D(32degrees). (b) Explain why the domain should be restricted to [-57.5degrees,32degrees].
The stopping distance of regular tires on glare ice is estimated by the function D(F) = 2F+115, where D(F) is the stopping distance in feet and F is the air temperature in degrees Fahrenheit.
(a) D(0°) = 115 feet, D(-20°) = 95 feet, D(32°) = 147 feet
(b) The domain should be restricted to [-57.5°,32°] because the function D(F) gives a negative value when F is less than -57.5°, which is not physically possible. The function is also not defined for temperatures greater than 32° because the stopping distance is not a linear function of the temperature at higher temperatures.
The stopping distance of regular tires on glare ice is estimated by the function D(F) = 2F+115, where D(F) is the stopping distance in feet and F is the air temperature in degrees Fahrenheit. For specific temperatures, D(0°) = 115 feet, D(-20°) = 95 feet, and D(32°) = 147 feet. The domain should be restricted to [-57.5°,32°] because the function is not physically possible for temperatures less than -57.5° and is not a linear function of temperature at higher temperatures.
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to find ln3, a linear approximation to the function y=lnx and x=e is used. what is the result?
Logarithm ln3 is approximately 1.682.
Logarithm, the exponent or power to which a base must be raised in order to produce a specific number.
The linear approximation of the natural logarithm function near x=e is given by y ≈ ln(e) + (y'(e))(x-e), where y'(e) is the derivative of the logarithm function at x=e.
Since ln'(x) = 1/x, we have y'(e) = 1/e.
Substituting x=3 and e=2.71828... into the approximation, we get:
ln(3) ≈ ln(e) + (1/e)(3-e) = ln(e) + (3-e)/e
ln(e) = 1, so the result is:
ln(3) ≈ 1 + (3-e)/e ≈ 1 + 0.682 ≈ 1.682.
Hence, ln3 = 1.682.
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Gianna is saving money and plans on making monthly contributions into an account
earning an annual interest rate of 3% compounded monthly. If Gianna would like to
end up with $26, 000 after 3 years, how much does she need to contribute to the
account every month, to the nearest dollar? Use the following formula to determine
your answer.
She need to contribute to the account every month, to the nearest dollar is $26,195.00.
What is compounded interest ?An annual interest rate of 3% compounded monthly. If Gianna would like to end up with $26, 000 after 3 years,
A = $26,195.00
I = A - P = $195.00
A is equal to P(1 + rt).
Calculation:
To start, multiplying R percent by 100 gives us 3%/100, or 0.03 each year.
For ease of calculation, let's convert time to years: 3 months / 12 months / year = 0.25 years.
How to resolve our equation
A = 26000(1 + (0.03 × 0.25)) = 26195\sA = $26,195.00
The total amount accrued, principal plus interest, from simple interest on a principal of $26,000.00 at a rate of 3% per year for 0.25 years (3 months) is $26,195.00.
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The Department of Energy was also eager to sign on, in part because it wanted to learn about how radiation causes genetic O combinations O mutations O fulminations O corrections.
The Department of Energy was also eager to sign on, in part because it wanted to learn about how radiation causes genetic mutations.
What is mutation ?An modification in the nucleic acid sequence of an organism's, virus's, or extrachromosomal DNA is referred to as a mutation. DNA or RNA can be found in the viral genome.
Any alteration to a cell's DNA sequence. Mistakes in cell division can result in mutations, as can exposure to environmental DNA-damaging substances.
Ionizing radiation may harm genetic material (mutations) in gonads or germ cells, which can result in disorders with a genetic component (hereditary defects). Malformations, metabolic issues, immune system deficits, etc. might occur from them.
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please help. me i really need ot get this righttt
By taking a quotient we will see that he has saved $450.
How much will he have saved across these two months?On the first month Lance earnesd $546, and on the second month he earned $354.
Adding these we get:
$546 + $354 = $900
So he earned a total of 900 dollars between April and June. And we know that he saves half of that, then the amount saved is equal to that divided by 2:
$90/2 = $450
He has saved 450 dollars.
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HELP ASAP PLEASE!!!!!!
What is the equation of the line that is perpendicular to y = 4x + 6 and passes through the point (8, −4)?
y equals negative one-fourth times x minus 2
y equals negative one-fourth times x plus 7
y = 4x − 36
y = 4x + 24
Answer:
The slope of the line that is perpendicular to y = 4x + 6 is the negative reciprocal of the slope of y = 4x + 6, which is -1/4.
We can use the point-slope form of a line, y - y1 = m(x - x1), to find the equation of the line that passes through the point (8, -4) and has a slope of -1/4, where m = -1/4 and (x1, y1) = (8, -4).
Plugging in the values, we get:
y - (-4) = -1/4 (x - 8)
y + 4 = -1/4 x + 2
Multiplying both sides by 4, we get:
4y + 16 = -x + 8
Adding x to both sides, we get:
4y + 16 + x = 8
y = -x/4 - 2
So the equation of the line that is perpendicular to y = 4x + 6 and passes through the point (8, -4) is y = -x/4 - 2.
On making an horizontal slice through the solid, the following two-dimensional shape is produced. Select the solid that will yield this shape.
A. Rectangular prism
B. Pentagonal prism
C. Square prism
D. Trapezium prism
E. Hexagonal prism
If the two-dimensional shape produced by a horizontal slice through the solid is a trapezium, the solid is likely to be a trapezium prism. The correct answer would be an option (D).
When you make a horizontal slice through a solid, it cuts through the object along a plane and the shape that is produced is the cross-section of that plane.
A rectangular prism will produce a rectangle.
A pentagonal prism will produce a pentagon.
A square prism will produce a square.
A trapezium prism will produce a trapezium.
A hexagonal prism will produce a hexagon.
Therefore, if the two-dimensional shape produced by a horizontal slice through the solid is a trapezium, the solid is likely to be a trapezium prism.
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What is the 30 60 90 Triangle rule?
Step-by-step explanation:
this means a triangle with one angle 30°, a second angle 60°, and the third angle 90°.
the sides of such a 30-60-90 triangle are always in the ratio of 1 : √3 : 2
that means the Hypotenuse is twice the length of the shorter leg. and the longer leg is square root of 3 times longer than the shorter leg.
30-60-90 Theorem: If a triangle has sides in the ratio x: x 3: 2 x and angles of 30, 60, and, then it is a triangle. The longer leg, the hypotenuse, and the shorter leg are always the same. The Pythagorean Theorem can be used in their place if you ever forget these theorems.
What is a 30-60-90 Triangle?There are always angles of 30, 60, and 90 in this triangle. This triangle is a right triangle because one of the angles is 90 degrees. The result is a right-angled triangle formed by these angles. Acute angles will have a ratio of 1: 2 or 2: 1, and the right angle is equal to the sum of two acute angles.Triangle with sides of 30-60-90
It is a special triangle with specified lengths and angles, as was previously stated. The sides of triangles with 30 sides, 60 sides, and 90 sides are therefore referred to as Pythagorean triples.Sides of a triangle with angles of 30–60–90:
Since 30 degrees is the lowest angle, the side that is perpendicular to it is always the shortest.Since 60 degrees is the mid-sized degree angle in this triangle, the side opposite will be of medium length.Due to the fact that 90 degrees is the biggest angle, the side opposite of that angle will always be the largest. The term "hypotenuse" refers to this side of a triangle.To Learn more About triangle Refer To:
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In Exercises 13, an initial-value problem is given. (a) Find a formula for the solution (b) State the domain of definition of the solution. (c) Describe what happens to the solution as it approachs the limits of its domain of definition. Why can't the solution be extended for more time? dy/dt=y^3 , y(0)=1
As per the initial-value problem, the formula for the solution is dy/dt = y³
An initial-value problem, which involves finding a formula for a solution based on an initial value and a differential equation.
In this specific problem, the differential equation is
=> dy/dt = y³
and the initial value is
=> y(0) = 1.
To solve for the formula, we will use mathematical techniques to find the solution for y based on the given conditions.
The domain of the definition of the solution refers to the set of all possible values for the independent variable (t in this case) for which the solution is valid. In this problem, the domain of the solution is determined by the conditions that ensure the solution is well-defined.
As the solution approaches the limits of its domain, certain properties of the solution may change.
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can any board of size 6 n × 6 n be tiled with trominoes so that no two overlap and all squares are covered?
The 6n × 6n board can be tiled with trominoes if n is even.
A tromino is a geometric shape made up of three squares, and a 6n × 6n board is a grid of squares with 6n rows and 6n columns.
The question is whether it is possible to tile a 6n × 6n board with trominoes so that no two overlap and all squares are covered.
In order for a 6n × 6n board to be tiled with trominoes, n must be an even number. This is because each tromino covers three squares and there must be a whole number of trominoes to cover the entire board. If n is even, the board can be tiled with trominoes.
To do so, the board is divided into 2n rows of 3 squares each and 2n columns of 3 squares each. A tromino is placed in each of the resulting 3 × 3 squares, covering all of the squares in the board.
Each tromino covers three squares and the board can be divided into a grid of 3 × 3 squares that can each be filled with a tromino.
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a soccer ball is kicked at an angle of 61° to the horizontal with an initial speed of 25 m/s. assume for the moment that we can neglect air resistance. (a) for how much time is the ball in the air?
A soccer ball in the air for time 4.929 seconds.
Projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity. The object is called a projectile, and its path is called its trajectory
The vertical position of a projectile launched from the ground with velocity v and angle θ is:
y(t)=−4.9t^2+(vsinθ)t
We can factor this as:
y(t)=t(−4.9t+vsinθ)
Now we know that t=0 is one root, when you first kick it, so we only need to solve for the other root
−4.9t+vsinθ=0
t=vsinθ/4.9
Plugging in what we have:
t=25sin61/4.9
t = 25 *0.96611777 /4.9
t≈4.929 sec
So about 4.929 seconds.
A soccer ball in the air for time 4.929 seconds.
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For f(x)=3x+1 and g(x)=x2-6, find (f times g)(4)
The value of the composition function f ( g ( 4 ) ) = 31
What is Composition of functions?Evaluation of a function at the value of another function is known as Composition of function. A function composition is a process in which two functions, f and g, form a new function, h, in such a way that h(x) = g(f(x)). This signifies that function g is being applied to the function x. So, in essence, a function is applied to the output of another function.
Given data ,
Let the first function be represented as f ( x )
Now , the value of f ( x ) = 3x + 1
Let the second function be represented as g ( x )
Now , the value of g ( x ) = x² - 6
And , the composition function f ( g ( x ) ) is calculated as
when x = 4
Substitute the value of x = 4 in the equation , we get
g ( x ) = x² - 6
g ( 4 ) = 4² - 6
g ( 4 ) = 10
f ( g ( 4 ) ) = f ( 10 )
Substitute the value of x = 10 in the equation , we get
f ( x ) = 3x + 1
f ( 10 ) = 3 ( 10 ) + 1
f ( 10 ) = 31
Hence , the equation is f ( g ( 4 ) ) = 31
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a rectangle has perimeter 74 inches, and its area is 322 square-inches. find the dimensions of this rectangle.
the dimensions of rectangle is l = 23 and w = 14
Rectangle
Given,
A rectangle has perimeter 74 inches, and its area is 322 square-inches
To find the dimensions of this rectangle.
Steps:
With this question it is known that the perimeter of the rectangle is 74 inches and the area is 322 inches. the question is what is the length and width of the rectangle.
The formula for the perimeter of a square is P = l + l + w + w or P= 2(l + w) and the formula for the area of a rectangle is A = l x w.
the formula for the perimeter of a rectangle is P= 2(l + w) that means w=l(p/2-l) and the formula for the area of a rectangle is A = l x w, usually l is longer than w
insert the w equation with the perimeter formula into the area formula A = l (p/2-l) to
solve this equation: [tex]l\\^{2}[/tex] - ([tex]\frac{P}{2}[/tex]) x l + A=0 to get l
[tex]l\\^{2}[/tex] - (74/2) l +322=0
[tex]l\\^{2}[/tex] - 37l + 322=0
(l-23)(l-14)=0 so
l =23 and l=14,
it can be concluded that l = 23 and w = 14
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What does it mean when a quadratic function has two irrational roots?
(I need to explain it for a math final)
A quadratic function can have two irrational roots.
but A quadratic equation can have no real number solutions.
What is quadratic function?
A quadratic function is a polynomial function with one or more variables in which the highest exponent of the variable is two. Since the highest degree term in a quadratic function is of the second degree, therefore it is also called the polynomial of degree 2. A quadratic function has a minimum of one term which is of the second degree. It is an algebraic function.
The parent quadratic function is of the form f(x) = x^2 and it connects the points whose coordinates are of the form (number, number^2). Transformations can be applied on this function on which it typically looks of the form f(x) = a (x - h)^2 + k and further it can be converted into the form f(x) = ax^2 + bx + c.
Now,
According to the question,
A quadratic function can have two irrational roots. we can understand this by taking a example.
example:
x^2-x-2=0
This equation have two irrational roots 1+√3 and 1 - √3.
A quadratic function can have no real number solutions.
Hence,
A quadratic function can have two irrational roots.
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2. True or false: f(x) is a function.
Answer:
True
Step-by-step explanation:
the function is y = x/5
which of the following are true statements? i. in an experiment researchers decide how people are placed in different groups. ii. in an observational study, the participants select the group they are in. iii. a control group is most often a self-selected grouping in an experiment.
Statements i. and ii. are true while statement iii. is incorrect because, in an experiment, the control group is usually selected and assigned by the researchers, not self-selected by the participants.
i. True. In an experiment, the researchers have control over how participants are placed into different groups, usually through random assignment.
ii. True. In an observational study, participants are usually not manipulated by the researchers and are free to choose which group they belong to.
iii. False. A control group in an experiment is usually not self-selected. The control group is typically determined by the researchers through random assignment. The purpose of the control group is to provide a comparison to the experimental group in order to determine if the treatment has a significant effect.
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if anyone could explain how to divide radical expressions like example: √15xy÷∛10xy³=? need help asappp
The required simplified solution of the given radical expression is [tex]\sqrt{15} \times x^{1/6} / \sqrt[3]{10} \times y[/tex].
What is simplification?The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.
Here,
Given a radical expression,
[tex]= \sqrt{15xy} / \sqrt[3]{10xy^3}[/tex]
Now, [tex]\sqrt{15xy} = [15xy]^{1/2}[/tex] and [tex]\sqrt[3]{10xy^3} = [10xy^3]^{1/3}[/tex]
[tex]= [15xy]^{1/2}/ [10xy^3]^{1/3}\\[/tex]
After simplifying the above expression,
= [tex]\sqrt{15} \times x^{1/6} / \sqrt[3]{10} \times y[/tex]
Thus, the required simplified solution of the given radical expression is [tex]\sqrt{15} \times x^{1/6} / \sqrt[3]{10} \times y[/tex].
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josh had to do the dishes after work. he washed 1 small plate and 4 large plates. how many plates did he wash in total?
Josh washed a total of 5 plates if he want to do the dishes after work.
Dish Washing Total CountTo find the total number of plates washed by Josh:
Start with the number of small plates, which is 1.Add the number of large plates, which is 4.The total number of plates is 1 + 4 = 5.The scenario describes a person named Josh who had to wash dishes after work.
The method used to find the total number of plates washed by Josh was simple addition. The number of small plates (1) and the number of large plates (4) were added together to find the total number of plates (1 + 4 = 5). This type of problem is usually taught in grade 1 or grade 2, as part of early mathematics education that focuses on basic addition and counting skills.
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What is the
circumference of a
circle with a radius of
3 inches? (show work)
Answer:
18.84 inches
Step-by-step explanation:
circumference of a circle = diameter x pi
diameter = radius x 2
==> circumference = radius x 2 x pi = 3 in x 2 x 3.14 = 18.84 in
in an experiment, a ball is drawn from an urn containing 9 green balls and 11 orange balls. if the ball is green, three coins are tossed. otherwise two coins are tossed. how many elements of the sample space will have a green ball?
There are 13 elements of the sample space that will have a green ball.
The various ways in which objects from a set may be selected, generally without replacement, to form subsets.
Since, when a green ball is drawn, three coins are tossed. So, sample points are OHHH, OHHT, OHTH, and OHTT. OTHH, 0THT, OTTH, OTTT
So, clearly, 9 sample points will have an orange ball.
When a blue ball is drawn, two coins are tossed. So, sample points are BHH, BHT, BTH, and BTT.
So, clearly, 4 sample points will be when a blue ball is drawn.
Total samples points=4+9=13
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The function f(x) = log, i tranformed to g(x) = -3 log(x 2) - 1. Decribe the tranformation. Thi i pre calculu btw
The Transformation of the function f(x) = log₅(x) to g(x) = 3 - log₅(x) is a vertical reflection followed by a vertical translation.
(i) The original function f(x) = log₅(x) is first reflected over the x-axis, which changes the sign of the function. The result is a graph that is upside-down compared to the original. the function becomes -log₅(x) .
(ii) Next, the transformed function g(x) is shifted up by 3 units, which results in the vertical translation of the graph. This transformation changes the range of the original function, but the shape of the graph remains unchanged.
So , the function becomes g(x) = 3 - log₅(x).
Therefore , The transformation of f(x) to g(x) changes the orientation of the graph and shifts it vertically, but does not affect its shape.
The given question is incomplete , the complete question is
The function f(x) = log₅(x) , is transformed to g(x) = 3 - log₅(x).
Describe the transformation.
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The um of Lia' age and myra age i 40. In 10 year lia will be three time a older than myra. How old i each peron
The present age of Lia is 35 and the present age of Myra is 5.
The sum of Lia's age and Myra's age is 40.
Let the present age of Myra is x and the present age of Lia is y.
So the equation should be
x + y = 40..................(1)
After 10 year the age of Myra is x + 10 and age of Lia is y + 10.
In 10 year Lia will be three time a older than Myra.
y + 10 = 3(x + 10)
Simplify
y + 10 = 3x + 30
Subtract 10 on both side, we get
y = 3x + 20
Now putting the value of y in the equation 1.
x + 3x + 20 = 40
4x + 20 = 40
Subtract 20 on both side, we get
4x = 20
Divide by 4 on both side, we get
x = 5
The present age of Myra is 5.
Now putting the value of x in equation 1
x + y = 40
5 + y = 40
Subtract 5 on both side, we get
y = 35
The present age of Lia is 35.
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The complete question is:
The sum of Lia's age and Myra's age is 40. In 10 year Lia will be three time a older than Myra. How old is each person?
