3.) Simplify the expression.
cos ( u + π )
a.) cot u
b.) cos u
c.) sin u
d.) - cos u
e.) tan u

Answer:

{3, 5}.

Step-by-step explanation:

y = x^2 - 8x + 15

(x - 5)(x - 3) = 0

x - 5 = 0 or x - 3 = 0

So the roots are {3, 5}.

Answer:Sam has 29 movies.

Sam has 11 TV shows.

Step-by-step explanation:

Let x represent the number of movies that Sam has.

Let y represent the number of TV shows that Sam has.

Sam has a total of 40 dvds, movies and tv shows. This means that

x + y = 40 - - - - - - - - - - -1

The number of movies is 4 less then 3 times the number of tv shows. This means that

x = 3y - 4 - - - - - - - - - - -2

Substituting equation 2 into equation 1, it becomes

3y - 4 + y = 40

4y - 4 = 40

4y = 40 + 4 = 44

y = 44/4 = 11

x = 3y - 4 = 3 × 11 - 4

x = 33 - 4

x = 29

By creating a system of equations from the given problem, m + t = 40 and m = 3t - 4, and solving it through substitution, it was determined that Sam has 29 movies and 11 TV shows in his DVD collection.

To solve the given problem, we need to use a system of linear equations. The two variables we need to find are the number of movies (m) and the number of TV shows (t).

According to the problem, the total number of DVDs, which includes both movies and TV shows, is 40. This can be written as an equation: m + t = 40. Additionally, we are told that the number of movies is 4 less than three times the number of TV shows. This gives us a second equation: m = 3t - 4.

Now we have the following system of equations:

We can solve this system by substitution. First, substitute the second equation into the first equation:

Now that we have found the number of TV shows (t), we can calculate the number of movies (m):

Therefore, Sam has 29 movies and 11 TV shows in his collection of 40 DVDs.

Answer:

a) [tex] \frac{dx}{dt}= kx (M-x) -hx[/tex]

[tex] \frac{dx}{dt}= kx (M -x- \frac{h}{k})[/tex]

b) [tex] M -\frac{h}{k}>0 [/tex]

Let's say that [tex] a=M -\frac{h}{k}>0[/tex]

If we multiply the woule equation by k we got:

[tex] kM -h >0[/tex]

So then we satisfy that the equation is also logistic since the parameter [tex] a>0[/tex]

c) If we assume that [tex] kM <h[/tex] then we have that [tex] a<0[/tex]

And then [tec] kx (a -x) <0[/tex] for any value of [tex] x>0[/tex]

And if that hhapens then the population will tend to 0 for any initial condition established/

Step-by-step explanation:

For this case we have the following logistic equation [tex] \frac{dx}{dt}= kx (M-x)[/tex]

Part a

We want to modify our harvesting for this case, so we harvest hx per unit of time for some [tex] h>0[/tex]

So then the model with harvesting who is proportional is given by:

[tex] \frac{dx}{dt}= kx (M-x) -hx[/tex]

And we can write like this:

[tex] \frac{dx}{dt}= kx (M -x- \frac{h}{k})[/tex]

Part b

For this case we assume that [tex] kM>h[/tex]and we need to show that the equation is still logistic. So we need that the sollowing quantity higher than 0

[tex] M -\frac{h}{k}>0 [/tex]

Let's say that [tex] a=M -\frac{h}{k}>0[/tex]

If we multiply the woule equation by k we got:

[tex] kM -h >0[/tex]

So then we satisfy that the equation is also logistic since the parameter [tex] a>0[/tex]

Part c

If we assume that [tex] kM <h[/tex] then we have that [tex] a<0[/tex]

And then [tec] kx (a -x) <0[/tex] for any value of [tex] x>0[/tex]

And if that hhapens then the population will tend to 0 for any initial condition established/

Answer:

Company made 63 rods with the given amount of steel.

Step-by-step explanation:

Given:

Radius of each rod =4 cm

height of each rod = 30 cm

Number of steel company used = 94953.6

We need to find how many rods company can make.

Solution:

First we will find the Volume of each rod.

Since rod is in cylindrical shape.

So we will use Volume of cylinder.

Now Volume of cylinder is given by π times square of the radius times height.

framing in equation form we get;

Volume of each rod = [tex]\pi r^2h= \pi \times4^2\times 30 = 1507.96 \ cm^3[/tex]

So we can say that steel used to make each rod = 1507.96

Number of steel company used = 94953.6 (given)

To find the number of steel rod company made we will divide Number of steel company used by number of steel used to make each rod.

framing in equation form we get;

number of steel rod company made = [tex]\frac{94953.6}{1507.96}= 62.96\approx63[/tex]

Hence Company made 63 rods with the given amount of steel.

The number of rods made using given data is approximately 63 rods .

To find out how many steel rods a company made based on the total volume of steel used, we need to calculate the volume of one rod and then divide the total volume of steel by this.

The volume of a cylinder (which is the shape of the rods) is calculated using the formula V = πr²h, where V is the volume, r is the radius, and h is the height.

Given that each rod has a radius of 4 centimeters and a height of 30 centimeters, the volume of one rod can be found as follows:

V = π(4²)(30)

   ≈ 3.14(16)(30)

   = 1,507.2 cm³

Given the total volume of steel used is 94,953.6 cm³, the number of rods made can be calculated by dividing the total volume of steel by the volume of one rod:

Number of rods = 94,953.6 cm³ / 1,507.2 cm³

                           ≈ 63

Therefore, the company made approximately 63 steel rods.

Answer:

The answer to your question is AC = 14

Step-by-step explanation:

To solve this problem, we must use trigonometric functions.

And we must look for a trigonometric function that relates the opposite side and the hypotenuse.

This trigonometric function is the sine

   [tex]sin\alpha = \frac{opposite side}{hypotenuse}[/tex]

solve for Opposite side = AC

  AC = hypotenuse x sin α

- Substitution

  AC = 25 x sin 34

- Simplification

  AC = 25 x 0.56

- Result

  AC = 14

Answer:

A. 1 only.

Step-by-step explanation:

Answer:

(2x-3)/(x+4)

Step-by-step explanation:

Answer:

(x - 4).

Step-by-step explanation:

(x - 4) is common to to top and bottom of the fraction.

The fraction simplifies to (2x+3)/(x+4).

Answer:

The number of cookies in each package = 6

Step-by-step explanation:

Given:

Taylor purchased a pack of cookies.

Number of cookies Taylor gave to her friends = 5

Number of cookies she had left = 1

To find the number of cookies 'p' in each package.

Solution:

[tex]p\rightarrow[/tex] Number of cookies in each package.

If Taylor gave away 5 cookies to her friends, then the number of cookies left in the package can be represented as:

⇒ [tex]p-5[/tex]

Number of cookies she had left = 1

So, the equation to solve for [tex]p[/tex] can be given as:

[tex]p-5=1[/tex]

Solving for [tex]p[/tex]

Adding 5 both sides.

[tex]p-5+5=1+5[/tex]

∴ [tex]p=6[/tex]

Thus, number of cookies in each package = 6.

Answer:

  all real numbers except 2 and 4

Step-by-step explanation:

The exceptions in the domain are the values that make the denominator zero. For a denominator of x² -6x +8 = (x -4)(x -2), the values that make it zero are x=4 and x=2.

The domain is all real numbers except 2 and 4.

Answer:

Option D is correct.

The domain of the function f(x) is all real numbers except 2 and 4.

Step-by-step explanation:

f(x) = (x+1)/(x²-6x+8)

The domain of a function expresses the region of values of x, where the function exists.

And logically, a function exists where ever f(x) has a finite value. That is, the only point where A function does not exist is when f(x) gives infinity.

For a rational function, the point where a function doesn't exist is when the denominator of the rational function is equal to 0. Because (numerator/0) --> ∞

So, the denominator in this question is

x²-6x+8

The function doesn't exist when

x²-6x+8 = 0

So, we solve the quadratic equation that ensues to get the values of x where the function doesn't exist.

x²-6x+8 = 0

x² - 4x - 2x + 8 = 0

x(x-4) - 2(x-4) = 0

(x-2)(x-4) = 0

(x-2) = 0 or (x-4) = 0

x = 2 or x = 4

This means that the function doesnt exist at x = 2 and x = 4

Indicating further that the function exists everywhere except at x = 2 and x = 4.

Hence, from the definition of domain given above, it is clear that the domain of the given function is all real numbers except 2 and 4.

Hope this Helps!!!

Answer: he earned $344 in all.

Step-by-step explanation:

When he does work outdoors he earns $12 an hour. This means that if he works outdoors for x hours, he would earn $12x

When he works indoors he earns $8 an hour. This means that if he works indoors for y hours, he would earn $8y.

Last month he worked 18 hours outdoors. This means that the total amount that he earned working outdoors is

12 × 18 = $216

He worked 16 hours indoors. This means that the total amount that he earned working indoors is

8 × 16 = $128

Total amount that he earned is

216 + 128 = $344

To know how much of Hillary's payments are deductible as alimony in 2019, we first need to figure out how old her son was when Hillary got divorced in 2016.

Given that Hillary has to pay until her son turns 18 and this occurs 7 years after the divorce, this means that her son was 18 - 7 = 11 years old in 2016.

Therefore, he will be turning 18 in 2025 (2016 + 9 years).

In 2019, which is 3 years after 2016, her son would be 11 + 3 = 14 years old. As her son has not yet reached 18 years old, Hillary is still making $200 payments per month in 2019.

Given there are 12 months in a year, the total amount of alimony payments that Hillary made in the year 2019 is 12 * $200 = $2400.

So, the amount of her 2019 payments that are deductible as alimony is $2400.

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Answer:

TOTAL ACCELERATION =10.229m/s²

Step-by-step explanation:

total acceleration = [tex]\sqrt{centripetal accleration^{2} +tagential acceleration^{2} }[/tex]

since tangential speed is constant , tangential acceleration =0

Thus total acceleration = centripetal acceleration.

centripetal acceleration = v²/r

v=82.6m/s  , r= 667m

centripetal acceleration = 82.6²/667

centripetal acceleration = 10.229m/s²

TOTAL ACCELERATION =10.229m/s²

Final answer:

The magnitude of the total acceleration of a race car traveling with a constant tangential speed of 82.6 m/s around a circular track of radius 667 m is 10.20 m/s², which is the centripetal acceleration.

Explanation:

The question asks to find the magnitude of the total acceleration of a race car traveling with a constant tangential speed of 82.6 m/s around a circular track of radius 667 m. In circular motion, the total acceleration is the centripetal acceleration, since the tangential speed (speed along the arc of the circle) is constant and there is no tangential acceleration. The formula for centripetal acceleration (ac) is ac = v2 / r, where v is the tangential speed and r is the radius of the circular path.

Using the given values:

ac = (82.6 m/s)2 / 667 m = 10.20 m/s2

Therefore, the magnitude of the centripetal acceleration of the race car is 10.20 m/s2.

The expression to represent the total price of the supplies is 1.29n + 0.79w + 2.39b

Solution:

Let "n" be the number of nails

Let "w" be the number of washers

Let "b" be the number of bolts

Given that ,

Price of nail = $ 1.29 per lb

Price of washers = $ 0.79 per lb

Price of bolts = $ 2.39 per lb

To find: Expression to represent the total price of the supplies.

Total price = number of nails x Price of nail per lb + number of washers x Price of washers per lb + number of bolts x Price of bolts per lb

[tex]Total\ price = n \times 1.29 + w \times 0.79 + b \times 2.39\\\\Total\ price = 1.29n + 0.79w + 2.39b[/tex]

Thus the expression to represent the total price of the supplies is found

Answer: The length x =17.64ft

Step-by-step explanation:

Looking at the diagram,to find x,we ues adj/hyp = cos 25°

16/x=cos25°

Cross multiply

X=16/cos25°

X=17.64ft

Answer:

17 feet 8 in

Step-by-step explanation:

im doing it in class imao

Answer:

3/80

Step-by-step explanation:

If one fifth of apricots are split into 4 parts, each bag has 1/5 * 1/4 of the original apricots

1/5 * 1/4 = 1/20

Luke keeps 3/4 of those so that's

3/4 * 1/20 = 3/80

Answer:

i am 70% sure its a

Step-by-step explanation:

Approximately 97.72% of 18-year-old women have a systolic blood pressure between 96 mmHg and 144 mmHg.

To find the percentage of 18-year-old women with a systolic blood pressure between 96 mmHg and 144 mmHg, we need to calculate the z-scores for the given values using the formula z = (X - μ) / σ, where X is the value, μ is the mean, and σ is the standard deviation.

For X = 96 mmHg, z = (96 - 120) / 12 = -2.

For X = 144 mmHg, z = (144 - 120) / 12 = 2.

Using a standard normal distribution table, we can find that approximately 0.9772 (97.72%) of the values fall within 2 standard deviations from the mean. Therefore, approximately 97.72% of 18-year-old women have a systolic blood pressure between 96 mmHg and 144 mmHg.

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Final answer:

Approximately 95% of 18-year-old women have a systolic blood pressure between 96 mmHg and 144 mmHg, as calculated using Z-scores and the standard normal distribution.

Explanation:

The question asks us to determine the percentage of 18-year-old women who have a systolic blood pressure between 96 mmHg and 144 mmHg, given that the systolic blood pressure is normally distributed with a mean of 120 mmHg and a standard deviation of 12 mmHg.

We will use the concept of Z-scores to find this probability. A Z-score represents the number of standard deviations a data point is from the mean. We can calculate the Z-scores for the systolic blood pressure values of 96 mmHg and 144 mmHg and then use the standard normal distribution table to find the percentages. The calculations are as follows:

Z-score for 96 mmHg = (96 - 120) / 12 = -2
Z-score for 144 mmHg = (144 - 120) / 12 = 2

Looking at the Z-score table, we find that the area between Z = -2 and Z = 2 covers approximately 95% of the data under the normal distribution curve. Therefore, about 95% of 18-year-old women will have a systolic blood pressure between 96 mmHg and 144 mmHg.

Answer:

Last week she work  [tex]3\frac{54}{78}\ hours[/tex].

Step-by-step explanation:

Given:

Last week Stacy earned $24 for baby sitting for hours in her part time job at Burger city she work 12 hours and earned $78.

Now, to find the total hours she work last week.

As, given she work 12 hours and earned $78.

So, to solve by using unitary method:

If she earned $78 in working 12 hours.

So, she earned $1 in working = [tex]\frac{12}{78}\ hour.[/tex]

Thus, she earned $24 in working = [tex]\frac{12}{78} \times 24[/tex]

                                                        [tex]=\frac{288}{78}[/tex]

                                                        [tex]=3\frac{54}{78}\ hours.[/tex]

Therefore, last week she work  [tex]3\frac{54}{78}\ hours[/tex].

Answer:

Miss Silver stein can serve for 12 guests with amount of cake that she has bought.

Step-by-step explanation:

Given:

Number of cakes she bought = 3

Amount of cakes given to each guest = [tex]\frac{1}{4}[/tex]

We need to find the number of guest cakes can be served.

Solution:

Now we can say that;

the number of guest can have the cake to can be calculated by dividing the  Number of cakes she bought from Amount of cakes given to each guest

framing in equation form we get;

Number of guest can have cake = [tex]\frac{3}{\frac{1}{4}} = 3\times\frac{4}{1} =12[/tex]

Hence Miss Silver stein can serve for 12 guests with amount of cake that she has bought.

Answer: the distance from the bottom of the ladder to the base of the building is 12 feet.

Step-by-step explanation:

The ladder makes an angle, θ with the ground thus forming a right angle triangle with the wall of the house.

The length of the ladder represents the hypotenuse of the right angle triangle.

The distance from the ground to the point where the ladder touches the wall of the building represents the opposite side

Therefore, to determine the distance from the bottom of the ladder to the base of the building, x, we would apply Pythagoras theorem which is expressed as

Hypotenuse² = opposite side² + adjacent side²

37² = 35² + x²

1369 = x² + 1225

x² = 1369 - 1225 = 144

x = √144 = 12 feet

Final answer:

To find the distance from the bottom of the ladder to the base of the building, use the Pythagorean theorem with the given ladder height and building contact point. Calculate the distance as 12 feet.

Explanation:

A window-washer is climbing a ladder leaning against a building. In this scenario, the ladder is 37 feet long and touches the building 35 feet above the ground. To find the distance from the bottom of the ladder to the base of the building, we can use the Pythagorean theorem.

By applying the Pythagorean theorem: a² + b² = c², where a and b are the distances from the bottom of the ladder to the building and from the base to the building, respectively, and c is the length of the ladder, we can calculate the distance to be 12 feet.

Therefore, the distance from the bottom of the ladder to the base of the building is 12 feet.

Answer: the weight of Jon's pet is

(3v - 25) pounds

Step-by-step explanation:

The weight of Jon's dog is v pounds.

His cat weighs 21 pounds less than his dog. It means that the weight of his cat would be

(v - 21) pounds

His bunny weighs 3 pounds less than his cat. It means that the weight of his bunny would be

(v - 21) - 3 = (v - 24) pounds

Therefore, the weight of Jon's pets would be the sum of the weight of his dog, his cat and his bunny. It becomes

v + v - 21 + v - 24 = (3v - 25) pounds.

Final answer:

Jon's pets' total weight is calculated by adding the weight of the dog (v pounds), cat (v - 21 pounds), and bunny (v - 24 pounds), which results in 3v - 45 pounds.

Explanation:

To find the weight of Jon's pets, we start with the known weight of the dog and calculate the other animals' weights based on the given relationships. Jon's dog weighs ( v ) pounds. His cat weights 21 pounds less than his dog, so the cat weighs v - 21 pounds. The bunny weighs 3 pounds less than the cat, which means the bunny weighs (v - 21) - 3 pounds or v - 24 pounds.

Therefore, to find the total weight of Jon's pets, we add the weights of the dog, cat, and bunny together:

Dog's weight: v pounds

Cat's weight: v - 21 pounds

Bunny's weight: v - 24 pounds

The total weight is v + (v - 21) + (v - 24), which simplifies to 3v - 45 pounds.

Answer:

rows, columns

Step-by-step explanation:

Two dimensional array can be viewed as rows and columns.

It is viewed as matrix or grid as well therefore we can conclude that it can be viewed in terms of rows and columns.

The correct option is the first one, A two-dimensional array can be viewed as rows and columns.

A two-dimensional array is a data structure that stores elements in a grid-like format with rows and columns. It can be visualized as a table or matrix.

In this context, "rows" refer to the horizontal dimension of the array. Each row consists of a series of elements that are stored sequentially from left to right. The number of rows in the array represents the height or the total count of rows.

"Columns" refer to the vertical dimension of the array. Each column consists of a series of elements that are stored sequentially from top to bottom. The number of columns in the array represents the width or the total count of columns.

By organizing data in rows and columns, a two-dimensional array allows for efficient storage and retrieval of elements. The elements within the array can be accessed by specifying both the row and column indices.

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Answer:

32.40

Step-by-step explanation:

81 x 40% =48.60

81. -48.60 = 32.40

Answer:the college bookstore paid

$57.86 for the book.

Step-by-step explanation:

Let x represent the price that the college bookstore paid the publisher to get the book.

The college bookstore marks up the price by 40%. It means that the value of the mark up would be .40/100 × x = 0.4 × x = 0.4x

Therefore, the selling price of the book at the college bookstore would be

x + 0.4x = 1.4x

If the selling price of a book is $ 81.00, it means that

1.4x = 81

x = 81/1.4 = $57.86

Answer: 68 child tickets were sold

Step-by-step explanation:

Let x represent the number of child tickets that were sold that day.

Let y represent the number of adult tickets that were sold that day.

A total of 124 tickets were sold on Tuesday. This means that

x + y = 124

At the city Museum child admission is $5.70 and adult admission is $9.80. The total sales from tickets was $936. This means that

5.7x + 9.8y = 936 - - - - - - - - -1

Substituting x = 124 - y into equation 1, it becomes

5.7(124 - y) + 9.8y = 936

706.8 - 5.7y + 9.8y = 936

- 5.7y + 9.8y = 936 - 706.8

4.1y = 229.2

y = 229.2/4.1

y = 55.9

y = 56

x = 124 - y = 124 - 56

x = 68

Answer:

The answer to your question is he sold 47 adult tickets and 37 children tickets.

Step-by-step explanation:

Data

Adult ticket = a = $105

Children ticket = c = $60

Total number of tickets = 84

Total money earn = $7155

Equations

                              a + c      = 84     ------------ (I)

                        105a + 60c = 7155 -------------(II)

Multiply equation I by -60

                           -60a  - 60c = -5040

                          105a   + 60c = 7155

Simplify

                          45a               = 2115

                                           a = 2115 / 45

                                           a = 47 tickets

Substitute a in equation I

                          47 + c = 84

                                  c = 84 - 47

                                  c = 37 tickets

You can form linear equations from the given description then use that system to derive the solution.

The amount of each type of tickets sold are:

Children tickets sold = 37

Adult tickets sold = 47

You can represent the unknown amounts by the use of variables. Follow whatever the description is and convert it one by one mathematically. For example if it is asked to increase some item by 4 , then you can add 4 in that item to increase it by 4. If something is for example, doubled, then you can multiply that thing by 2 and so on  methods can be used to convert description to mathematical expressions.

Let the amount of adult tickets sold be "a"

Let the amount of children tickets sold be "c"

Since the total amount of tickets sold is given as 84

Thus,

Total tickets = children tickets + adult tickets

84 = c + a

a + c = 84

since 1 adult ticket costs $105,

thus, "a" adult tickets cost [tex]105 \times a = 105a \text{\:\:(Written in short)}[/tex] (in dollars)

Similarly,

since 1 children ticket costs $60

"c" children tickets cost [tex]60c[/tex] (in dollars)

Since the price obtained by selling those tickets is $7155

thus,

total amount earned = amount earned by children tickets + amount earned by adult tickets

$7155 = $60c + $105a

Thus, we got the system of equations as:

[tex]a + c = 84\\105a + 60c = 7155[/tex]

Multiplying first equation with -105 to make a's coefficient equal and opposite to make the addition of them eliminate "a":

[tex]-105a -105c = -105 \times 84\\105a + 60c = 7155\\\\\text{Addding both equations}\\\\-45c = 7155 - 8820 = -1665\\\\c = \dfrac{1665}{45} = 37[/tex]

Putting this value in first equation, we get:

[tex]a + c = 84\\a + 37 = 84\\a = 84 - 37 = 47[/tex]

Thus,

The amount of each type of tickets sold are:

Children tickets sold = 37

Adult tickets sold = 47

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Answer:

Life hack in this answer!

Step-by-step explanation:

The correct table is the second one, or the table on the bottom right. (Picture included).

Life hack --> To find the relative percentage/frequency of something, all you have to do is take the frequency you are trying to find, and divide it with the total.

Example: You are trying to find the frequency of REGULAR MALE jeans. What is its frequency? To find, all you have to do is divide 120 from 28. Like this:

28 = male regular jeans

120 = total

28 ÷ 120 = ?

28 ÷ 120 = 0.23333333...

Final answer: 0.23

In this scenario, we must round. But remember that you might not always need or have to round.

And, as predicted, the answer of 0.23 is in the second table under REGULAR MALE jeans.

If you have any questions, let me know!

I hope this helps!

- sincerelynini

The constant of the expression 15-8y is 15

Constants are values that are not attached to any variable. For example:

Now given the expression 15 - 8y

First, we can re-arrange to have:

-8y + 15

From the expression, we can see that 15 is not attached to any variable. Hence the constant of the expression is 15

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Answer: 0.60 gallon

Step-by-step explanation:

There are 12pounds in a standard US gallon.

12pounds= 1 gallon

5.2 pounds=?

5.2/12 × 1 gallon

0.624 gallon

Rounding to the nearest tenth =0.60

Answer: 0.8413

Step-by-step explanation:

Given : The scores on a test have a normal distribution with mean 24 and standard deviation 4.

i.e. [tex]\mu= 24[/tex]  and [tex]\sigma= 4[/tex]

Let x denotes the scores on the test.

Then, the probability that a student score less than 28 will be :-

[tex]P(x<28)=P(\dfrac{x-\mu}{\sigma}<\dfrac{28-24}{4})\\\\=P(z<1)\ \ [\because\ z=\dfrac{x-\mu}{\sigma}]\\\\=0.8413 \ \ [\text{By z-table}][/tex]

Hence, the the proportion of scores less than 28 is 0.8413 .

Answer:

The answer to your question is below

Step-by-step explanation:

1.-                           y = 2x - 64

                            x - 2y = 14

Substitution

                            x - 2(2x - 64) = 14

Simplification

                            x - 4x + 128 = 14

                             x - 4x = 14 - 128

                            -3x = - 114

                               x = 114/3

                               x = 38

                             y = 2(38) - 64

                             y = 76 - 64

                             y = 12

Solution (38, 12)

2.-                            y = x - 6

                               3x + 2y = 8

Substitution

                               3x + 2(x - 6) = 8

Simplification

                              3x + 2x - 12 = 8

                              5x = 8 + 12

                              5x = 20

                              x = 20 / 5

                            x = 4

                             y = 4 - 6

                             y = -2

Solution (4 , -2)

3.-                           x - y = 12

                            27 + 3y = 2x

                            x = 12 + y

                            27 + 3y = 2(12 + y)

                            27 + 3y = 24 + 2y

                            3y - 2y = 24 - 27

                                     y = -3

                             x = 12 - 3

                             x = 9

Solution y = -3

4.-                          y = 2x + 14

                           -4x - y = 4

                            -4x - (2x + 14) = 4

                            -4x - 2x - 14 = 4

                            -6x = 4 + 14

                            -6x = 18

                                x = 18/-6

                                x = -3

                            y = 2(-3) + 14

                            y = -6 + 14

                           y = 8

Solution   y = 8

Answer:

There is no solution.

Step-by-step explanation: