How to algebraically find the inverse of a function?

Answers

Answer 1
switch your x with y values and y with x values ( now ur previous y elements should be x and your previous x elements should be y)

then isolate the equation to solve for y
Answer 2

The inverse function of y = 3x + 2 is y = ( -x + 2 )/3 obtained by switchig the places of x and y.

What is a function?

A function can be thought of as an output for the given set of inputs.

To find the inverse of a function algebraically first we have determine whether the given function is one-to-one or not. A one-to-one function is a function in which each different value of the domain corresponds to a different value in the range of the function.

Suppose we have a function f(x) = 3x + 2 which can be written as y = 3x + 2.

Now to obtain the inverse of this function we have to switch x and y in their respective places and solve for y.

∴ y = 3x + 2

x = 3y + 2.

3y = - x + 2.

y = ( -x + 2 )/3.

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Related Questions

Two people start from the same point and move in opposite directions. The
first person jogs west traveling 5 mph, and the second person walks east
traveling 3 mph. In how many hours will the two people be 48 miles apart?

Answers

Two people are moving apart from each other at a steady rate. One is running at five miles an hour, while the other walks at three miles per hour. Thus, after one hour, they will be eight miles apart. At that steady rate of speed, it will take them six hours to move forty-eight miles apart from each other.

Ou work as a cashier for a grocery store and earn $5 per hour. you also mow lawns and earn $10 per hour. you want to earn at least $50 per week, but would like to work no more than 10 hours per week. which system of inequalities, along with y ≥ 0 and x ≥ 0, would you use to solve the real-world problem?

Answers

You have to do 50x times 10 per hour

The problem can be represented by two inequalities: one to ensure earning at least $50 per week (5x + 10y >= 50) and another to restrict working to no more than 10 hours per week (x + y <= 10), alongside x >= 0 and y >= 0 to indicate non-negative hours worked for each job.

To determine the system of inequalities to solve the problem, we need to define variables for the number of hours spent on each job. Let's use x to represent the number of hours working as a cashier at the grocery store, and y to represent the number of hours mowing lawns. The student earns $5 per hour at the grocery store and $10 per hour mowing lawns. They want to earn at least $50 per week and work no more than 10 hours in total.

From this information, we can establish the following inequalities:

5x + 10y >= 50 (To ensure earning at least $50 per week)

x + y = 10 (To ensure working no more than 10 hours per week)

Additionally, we include y >= 0 and x >= 0 to represent that the number of hours worked at either job cannot be negative.

The length of the hypotenuse of a right triangle is 13 cm. the length of one leg is 5 cm. find the length of the other leg. (1 point) 14 cm 144 cm 8 cm 12 cm

Answers

12 cm The solution to this problem requires the Pythagorean theorem which is a^2 + b^2 = c^2 where a,b = legs of the right triangle c = hypotenuse of right triangle Let's substitute the known values into the equation and solve a^2 + b^2 = c^2 5^2 + b^2 = 13^2 25 + b^2 = 169 b^2 = 144 b = 12 So the length of the 2nd leg is 12 cm.

Answer: 12

Step-by-step explanation:

Fatima is shading this model to show 0.08x3 . shade the correct amount of boxes that will show the product

Answers

Shade 0.08 3 times

In total that's 24 hundreths to shade


For more help, please upload a picture

Hope this helps!!

Shade 0.08 3 times

In total that's 24 hundreths to shade

all im doing is trying to get points Lol

25xy4 + 60xy3 5xy 5xy3 + 12xy2 5y2 + 12 5xy + 12y 5y3 + 12y2

Answers

the simplified expression is 25xy^4 + 65xy^3 + 22xy + 12xy^2 + 18y + 12y^2 + 5y^3 + 12

To simplify the given expression, we first need to combine like terms. Like terms are those that have the same variables raised to the same powers. In this case, we have terms with x and y raised to different powers.

The expression is:

25xy^4 + 60xy^3 + 5xy^3 + 5xy + 12xy^2 + 5y^2 + 12 + 5xy + 12y + 5y^3 + 12y^2

Now, let's combine the like terms:

Combine the terms with xy^4: 25xy^4

Combine the terms with xy^3: 60xy^3 + 5xy^3 = 65xy^3

Combine the terms with xy^2: 12xy^2

Combine the terms with xy: 5xy + 5xy + 12xy = 22xy

Combine the terms with y^2: 5y^2 + 12

Combine the terms with y: 12y + 5y + 12y^2 = 18y + 12y^2

Combine the terms with y^3: 5y^3 + 5y^3 = 10y^3

Now, let's put all the combined like terms together:

25xy^4 + 65xy^3 + 22xy + 12xy^2 + 18y + 12y^2 + 5y^3 + 12

This is the simplified expression.

The probable question maybe:

simplify the given expression [tex]\(25xy^4 + 60xy^3 + 5xy + 5xy^3 + 12xy^2 + 5y^2 + 12 + 5xy + 12y + 5y^3 + 12y^2\)[/tex]

What is the height of an equilateral triangle with sides that are 12 cm long? Round to the nearest tenth. (1 point)

Answers

The height of an equilateral triangle can be found using the formula h = √3 / 2 × a. Therefore, when we plug in 12 for a, we get that the height of the equilateral triangle is 10.4 centimeters

Answer:

10.4 cm


Step-by-step explanation:

Looking at the triangle in the attached pic, we can see that the right, smaller triangle is a right triangle on which we can apply the pythagorean theorem to solve for the height, h.

Pythagorean theorem tells us [tex]c^2=a^2+b^2[/tex] where c is the hypotenuse (12 in our case) and a & b are the two legs (6 and h are the respective lengths).

So let's solve for h:

[tex]c^2=a^2+b^2\\12^2=6^2+h^2\\144=36+h^2\\144-35=h^2\\108=h^2\\h=\sqrt{108} \\h=10.4[/tex]

How to find the length and width of a rectangle when given the area and perimeter?

Answers

you add them on the both sides and multiply. 

What is the slope below

Answers

Use the two given points and the slope formula

(3, -2) and (2, -4)

m = (y2 - y1)/(x2 - x1) = (-4 - (-2))/(2 - 3) (-4 + 2)/(-1) = -2/(-1) = 2
-2 was this 8th grade algebra?

If 8 times a number is decreased by 20,the result is the same as 3 times the number increased by 80

Answers

Final answer:

The algebraic expression for the problem is '8n - 20 = 3n + 80', which simplifies to 'n = 20'. Therefore, the number in question is 20.

Explanation:

The question presents a classic algebra problem where we have to find the value of a variable that satisfies a given condition. Specifically, this problem states:

"If 8 times a number is decreased by 20, the result is the same as 3 times the number increased by 80."

To solve this, we'll convert the words into an algebraic equation and solve for the number. Let's use 'n' to represent the number:

8n - 20 = 3n + 80

This equation tells us that when you multiply the number by 8 and subtract 20, it's equal to the result of multiplying the number by 3 and adding 80. To find 'n', we combine like terms and solve:

8n - 3n = 80 + 205n = 100n = 100 / 5n = 20

Thus, the number we're looking for is 20.

If f(x) = x 2 + 1 and g(x) = 3x + 1, find 2f(1) + 3g(4).

1. 45
2. 43
3. 42

Answers

f(x) = x^2 + 1
f(1) = 1^2 + 1 = 2
so 2f(1) = 2(2) = 4

g(x) = 3x + 1
f(4) = 3(4) + 1 = 13
3g(4) = 3(13) = 39

 2f(1) + 3g(4) = 4 + 39 = 43

answer
2. 43

Arithmetic sequence find the next next term in the sequence 44, 51, 58, 65

Answers

the general term of the number sequence is +7 therefore the next teem would be 65+7=72

Hii!

_________________________________________________________

[tex]\rightsquigarrow\circ\boldsymbol{Answer}\circ\leftharpoonup[/tex]

72

[tex]\rightsquigarrow\circ\boldsymbol{Explanation.}\circ\leftharpoonup[/tex]

To find the next term in the arithmetic sequence, we should first find the common difference.

The common difference is the amount we add or subtract to obtain the next term. In the given sequence we add 7.

So, let's find the next term.

[tex]\twoheadrightarrow\sf65+7[/tex]

[tex]\bullet[/tex] Add 7

[tex]\twoheadrightarrow\sf72[/tex]

[tex]\bullet[/tex] Great job! We found the next term

--

Hope that this helped! Best wishes.

[tex]\textsl{Reach far. Aim high. Dream big.}\\\boldsymbol{-Greetings!-}[/tex]

--

What is the standard form of the equation of a parabola that opens left or right

Answers

Answer:

The equation of the parabola which opens left or right is [tex]x=ay^2+by+c[/tex].

Step-by-step explanation:

We know that,

If in the equation of the parabola,

1. If x is squared, then the parabola opens upwards or downwards.

2. If y is squared, then the parabola opens towards left or right.

Since, we want the equation of the parabola which opens left or right.

So, we get that,

The variable 'y' is being squared in the equation of the given parabola (from 1).

Thus, the equation of the parabola which opens left or right is [tex]x=ay^2+by+c[/tex].

Answer:

x = ay^2 + by + c

Step-by-step explanation:

it was correct for me

PLZ HELP ASAP!!!
1. Give me an example of irrational number (other than pi).
Be prepared to explain how you know its irrational.

2. How do you simplify x8 / x3?

3. Estimate square root of 39 without a calculator.
Be prepared to explain.

4. Write the following number in scientific notation: 402000.

Answers

An irrational number is something that cant be expressed as a ratio.  For ex:the square root of 2.  Hope this helps.

  

You and your friend are selling raffle tickets for a new laptop. you sell 14 more then your friend sells. Together you and your friend sell 58 tickets. Write a system of linear equations that represent this situation. How many did each of you sell?

Answers

Final answer:

You sold 36 tickets and your friend sold 22 tickets.

Explanation:

Let's represent the number of tickets you sell as x and the number of tickets your friend sells as y.

We know that you sell 14 more tickets than your friend, so we have the equation:

x = y + 14

We also know that together you and your friend sell 58 tickets, so the equation becomes:

x + y = 58

Now we can solve these two equations simultaneously to find the values of x and y.

Substitute the value of x from the first equation into the second equation:

(y + 14) + y = 58

Combine like terms:

2y + 14 = 58

Subtract 14 from both sides to isolate the variable:

2y = 44

Divide both sides by 2 to solve for y:

y = 22

Now substitute the value of y back into one of the original equations to solve for x:

x = 22 + 14

Simplify:

x = 36

Therefore, you sold 36 tickets and your friend sold 22 tickets.

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Final answer:

The system of equations representing the problem is y = x + 14 and x + y = 58. Solving this system we get x = 22 (friend's sold tickets) and y = 36 (your sold tickets).

Explanation:

We'll use a system of linear equations to model this situation. Let's define x as the number of tickets your friend sells, and y as the number of tickets you sell. From the problem, we know two things:

1. You sell 14 more tickets than your friend: y = x + 14.

2. Together, you and your friend sell 58 tickets: x + y = 58.

To solve this system, we can substitute y in the second equation with x + 14 from the first equation. This gives us:

x + (x + 14) = 58.

Solving this we get x = 22 and substituting x into the first equation gives: y = 22 + 14 = 36.

So, your friend sold 22 tickets, and you sold 36 tickets.

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The only solution of the equation x^2 +bc+16=0 is x=4 why is the value of b

Answers

Do you mean bc as the middle term, or is it bx?

If it has only a solution of x = 4, then you must have

(x - 4)(x - 4) = 0

x^2 - 8x + 16 = 0

-8x = bx

b = -8

If applying 6 newtons of force to an object results in 42 joules of work, what distance (in meters) would the object travel?

Answers

Answer:

The object would travel 7 meters.

Step-by-step explanation:

The distance the object would travel is 7 meters if applying 6 newtons of force to an object results in 42 joules of work.

What is distance?

Distance is a numerical representation of the distance between two items or locations. Distance refers to a physical length or an approximation based on other physics or common usage considerations.

We have:

If applying 6 newtons of force to an object results in 42 joules of work

We know,

Work = Force x Distance

42 = 6xDistance

Distance = 7 meters

Thus, the distance the object would travel is 7 meters if applying 6 newtons of force to an object results in 42 joules of work.

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Sammy has a 10-foot ladder, which he needs to climb to reach the roof of his house. the roof is 12 feet above the ground.

Answers

The roof is higher than the ladder can reach 10^2-1.5^2=h^2 h=sqrt(100-2.25)=9.89 feet distance to the roof= 12-9.89

A cone has a radius of five feet and a height of 18 feet. If the radius of the cone is tripled but the volume but the volume remains unchanged, what will be the new height of the cone

Answers

volume of a cone is 1/3 of the area of the base times the height
 v=(1/3)pi*5*5*18=(1/3)pi815*15*h
h=2

What's the probability of getting an even number and a head when rolling a die and then tossing a coin?

Answers

Answer: 1/4

Step-by-step explanation:

By definition a simple random sample of size n is any sample

Answers

N is the variable that can be changed. Like 4+n=13 and you would replace N with the correct number. which is 7

Simplify 6 - 4[x + 1 - (y + 3)] + 5y.

Answers

2(x+1-3y)+5y

2x+2-6y+5y

2x+2-y

-y+2x+2

What value of n would make point A the circumcenter?

1. 2
2. 3
3. 4
4. 5

Answers

Answer:

The correct option is 2. The value of n is 3.

Step-by-step explanation:

Circumcenter is the point, where the perpendicular bisectors of a triangle intersect each other.

Circumcenter is also known as the center of the triangle. The distance from circumcenter to each vertex are same.

In triangle DEF, if A is the circumcenter.

[tex]AE=AD[/tex]

[tex]10=2n+4[/tex]

Subtract 4 from both sides.

[tex]10-4=2n[/tex]

[tex]6=2n[/tex]

Divide both sides by 2.

[tex]3=n[/tex]

Therefore the value of n is 3 and option 2 is correct.

Answer:

Option 2 is true

Step-by-step explanation:

We have to find the value of n for which point A becomes circumcenter.

Circumcenter: It is that point where perpendicular bisectors of triangle intersects.

The circumcenter  is also knows as center of triangle.

Circumcenter is at equal distance from each vertex of triangle.

If point A is circumcenter then

AE=AD

We have AE=10 units

AD=2n+4

Substitute the value

10=2n+4

[tex]2n=10-4[/tex]

By subtraction property of equality

[tex]2n=6[/tex]

[tex]n=\frac{6}{2}=3[/tex]

Hence, the value of n is 3 would make point A the circumcenter.

A cooking group made 240 oz of spaghetti sauce to sell at a county fair. The group can pour the sauce into small jars that hold 8 oz and large jars that hold 16 oz. The group leader made a sketch to show the line representing the different combinations of jar sizes the group can use. The x-axis represented the number of small jars and the y-axis represented the number of large jars. The group leader labeled only the intercepts.

Which points did the group leader label?

(0, 8) and (16, 0)
(0, 30) and (15, 0)
(0, 15) and (30, 0)
(0, 16) and (8, 0)

Answers

*Given
 Total amount of spaghetti sauce - 240 oz.
 Small jar capacity                        - 8 oz
 Large jar capacity                        - 16 oz

Points: 
(0, 8) and (16, 0)
(0, 30) and (15, 0)
(0, 15) and (30, 0)
(0, 16) and (8, 0)

*Solution

The only points that would be labeled by the leader would be those points that would correspond to a total amount of 240 oz of spaghetti sauce. Thus, each point should be evaluated using the following expression: 

                        8x + 16y                    (EXPRESSION 1)
                        8x + 16y = 240          (EQUATION 1)

The expression and the equation was set up based on the condition that the x-axis corresponds to the number of small (8 oz) jars and the y-axis corresponds to the number of (16 oz) large jars. 

Since pairs of intercepts are given, both points should be evaluated using the given expression and each of the results should give an answer of 240. Thus, Equation 1 must be satisfied. 

Testing out each pair one by one:
1. (0,8) and (16,0)

                      8(0) + 16(8) = 128
                    8(16) + 16(0) = 128

This does not satisfy the condition set by Equation 1 because the result of the evaluation of each of the intercepts using Expression 1 is not 240. Therefore, these are not the intercepts of the line to be plotted. 

2. (0,30) and (15,0)

                     8(0) + 16(30) = 480
                     8(15) + 16(0) = 120     

This does not satisfy the condition set by Equation 1 because the result of the evaluation of each of the intercepts using Expression 1 is not 240. Therefore, these are not the intercepts of the line to be plotted. 

3. (0,15) and (30,0)

                     8(0) + 16(15) = 240
                     8(30) + 16(0) = 240

This satisfies the condition set by Equation 1 as each of the intercepts, when evaluated using Expression 1, gives an answer of 240.

4. (0,16) and (8,0)

                     8(0) + 16(16) = 256
                       8(8) + 16(0) = 64

This does not satisfy the condition set by Equation 1 because the result of the evaluation of each of the intercepts using Expression 1 is not 240. Therefore, these are not the intercepts of the line to be plotted. 

Thus, the points that the leader will be plotting on the graph are the intercepts (0,15) and (30,0). 

Which graph represents the solution set for the system 6x + y > -3 and 2x + y ≤ 4?

A. graph A
B. graph B
C. graph C
D. graph D

Answers

Graph b is your answer (:

Answer:

Option B. Graph B

Step-by-step explanation:

The given system of the inequalities are 6x + y > -3 and 2x + y ≤ 4

If we take the first inequality which represents the area below the line 6x + y = -3 or y = -6x - 3 (Slope of the line -6 and y-intercept is -3)

Second graph is represented by 2x + y ≤ 4 which represents the area below  the line y = 4 - 2x ( slope = -2 and y intercept = 4)

Option B shows the shaded area which the common area representing the solution set of these systems.

I Reaally Need Help If You Wamt Ill Eve Go Over 100 Points

Answers

(a) y = 2x + 3
(b) (1,5), (3,3); y = 3x + 3      5 = m1 + b, 3 = m3 + b
(c) coincident i believe, because it is not independent or inconsistent
(d) 2x + 3 = 3x + 3
     (-2x)(-3)  (-2x)(- 3)
0 = -2x
x = 0

hope this helps
a)
side walk 1
slope = (7-3)/(2-0) = 4/2 = 2

b = 3

slope intercept form
y = 2x + 3

b)
sidewalk 2
slope = (3-5)/(3-1) = -2/2 = -1

point slope form equation
y - 5 = -1(x - 1) 

slope intercept form
y - 5 = -1(x - 1)
y - 5 = -x + 1
y = -x + 4 ....slope intercept form

c)
sidewalk1 : y = 2x + 3
sidewalk2: y = -x + 4

2x + 3 = -x + 4
3x = 1
  x = 1/3

y = 2(1/3) + 3
y = 2/3 + 3
y = 3 2/3

solution x = 1/3 and y = 3 2/3
A system of two linear equations can have one solution so it's consistent and exactly 1 solution so it is independent
d) you can use this from c)
x = 1/3 and y = 3 2/3

The number of years that Brad has been on the soccer team is 2 less than five times a number of years Scott has in total the boys have been on the soccer team for about 10 years how long has Brad been on the soccer team

Answers

Let the number of years for Brad be x. Then Scott = 5x-2 x+5x-2 = 10 6x = 12 x = 2 Brad has been on the team for 2 years And Scott? 5x-2 = 5(2)-2 = 8 In total they've been on the team 10 years Brad = 2 Scott = 8 2+8 = 10 Correct

Find cotθ if θ terminates in Quadrant III and secθ = - 2.

Answers

O.2 is the answer too yout qeustion sir.
[tex]sec(x) = \frac{1}{cos(x)} \\ \\ -2 = \frac{1}{cos(x)} \\ \\ cos(x) = -\frac{1}{2} [/tex]

If you know your sine/cosine values you know that when:
 cos(x) = 1/2 , sin(x) = √(3)/2
The fact that theta, or "x" as I've been using... terminates in Quadrant III means both cosine and sine will be negative and then cotangent will be positive.

cot(x) = cos(x) / sin(x)
cot(x) = (-1/2) / (-√(3)/2)
cot(x) = (1/2) * (2/√(3))

cot(x) = 1/√(3)
or rationalized as √(3)/3




A wedge is cut out of a circular cylinder of radius 10 by two planes. one plane is perpendicular to the axis of the cylinder. the other intersects the first at an angle of 30° along a diameter of the cylinder. find the volume v of the wedge, taking rectangular cross-sections to be parallel to the line of intersection of the two planes, which is the x-axis. (let r = 10.)

Answers

The radius of the circular cylinder is given by:

[tex]r^2=x^2+y^2 \\ \\ \Rightarrow y=\sqrt{10^2-x^2}=\sqrt{100-x^2}[/tex]

The wedge makes a shape whose cross-section perpendicular to the x -axis at distance x from the origin is a triangle whose base is is given by: [tex]y=\sqrt{100-x^2}[/tex]

The height of the wedge is given by:

[tex]y\tan30^o= \frac{\sqrt{100-x^2}}{\sqrt{3}} [/tex]

The cross sectional area of the wedge is given by:

[tex]A(x)= \frac{1}{2} bh \\ \\ = \frac{\sqrt{100-x^2}}{2} \cdot\frac{\sqrt{100-x^2}}{\sqrt{3}} \\ \\ = \frac{100-x^2}{2\sqrt{3}} [/tex]

The volume is given by:

[tex]V= \int\limits^{10}_{-10} {A(x)} \, dx \\ \\ = \int\limits^{10}_{-10} {\frac{100-x^2}{2\sqrt{3}}} \, dx =2\int\limits^{10}_{0} {\frac{100-x^2}{2\sqrt{3}}} \, dx \\ \\ =\int\limits^{10}_{0} {\frac{100-x^2}{\sqrt{3}}} \, dx=\frac{1}{\sqrt{3}}\left[100x-\frac{x^3}{3}\right]^{10}_0 \\ \\ =\frac{1}{\sqrt{3}}\left[100(10)-\frac{(10)^3}{3}\right]=\frac{1}{\sqrt{3}}\left[1000-\frac{1000}{3}\right] \\ \\ =\frac{1}{\sqrt{3}}\left[\frac{2000}{3}\right]=\frac{2000}{3\sqrt{3}}[/tex]
Final answer:

The volume of the wedge is 50π/3 - 25√3.

Explanation:

To find the volume of the wedge, we need to calculate the volume of the cylindrical segment between the two intersecting planes. The formula for the volume of a cylindrical segment is V = h((R^2θ)/2 - (R^2sinθ)/2), where h is the height of the segment, R is the radius of the cylinder, and θ is the angle of the intersection between the planes. In this case, h is 10 and θ is 30°, so the formula becomes V = 10((10^2 * π/6)/2 - (10^2 * sin(π/6))/2). Simplifying the equation gives V = 50π/3 - 25√3.

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Solve each system. Then drag each one to the column headed by a point which could be its solution. (5,y) or (x,2)
2x-2y=12
-2x-3y=-22

2x-6y=10
x+8y=5

3x-y=-5
x+4y=7

x+y=2
2x+y=13

Answers

2x - 2y = 12
-2x - 3y = -22
solution could be (x,2)
===============
2x - 6y = 10 
x + 8y = 5
solution could be : (5,y)
==============
3x - y = -5
x + 4y = 7
solution could be : (x,2)
=============
x + y = 2
2x + y = 13
solution could be : neither....is this one written correctly ?

Answer: system 2 (5,0)        and                        system 3   (-1 2)

             2x-6y=10                                                      3x-y=-5

                x+8y=5                                                      x+4y=7

                             

Step-by-step explanation:

Solve each system. Then drag each one to the column headed by a point which could be its solution. (5,y) or (x,2)

system 1

2x - 2y =12          

-2x-3y = -22

solve simultaneous equation

2x - 2y =12          

-2x-3y = -22

add the equations gives

2x +(-2x) =0

-2y+(-3y) =-5y

12+ (-22) = -10

-5y =-10

y =2

2x -2(2) =12

2x-4 =12

2x = 12+4

x= 16/2 =8 x=8 and y =2 = (8,2)

system 2

2x-6y=10  *(-1) = -2x + 6y =-10

x+8y=5 *(2)    = 2x + 16y =10 add the equations

22y =0 y =0

x : 2x - 6(0) =10

x = 10/2 = 5

(5, 0)

 system 3

  3x-y=-5  *(-1) = -3x + y =5

  x+4y=7 * (3) = 3x + 12y = 21

add the equations = 13y = 26  y = 2

3x -2 =-5 = 3x = -3 =x =-1

(-1 2) answer

system 4

x+y=2   *(-2) = -2x -2y = -4

2x+y=13 *(1) = 2x +y = 13

add the two equations = -y =9

y = -9

substitute 2x-9= 13= 2x =22 x =11

(11 -9)

Help me please thanks

Answers

= 3 + √(9+7) - √(3*9)
= 3 + √16 - √27
= 3 + 4 - 3√3
= 7 - 3√3

answer
B.   7 - 3√3
Do both variables. 

Here, we have 3 + √16-√21.

The square root of 16 is 4. (3 + 4 - √21)

Simplify. 7 - √21.

Square root of 21 is 4.5

7 - 4.5 = 2.4

Round. 2

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