Pls someone help me! Giving brainless

Answer

Option D is correct.

x = ±i√(5) OR ±i√(3)

Explanation

The question wants us to solve

x⁴ + 8x² + 15 = 0

To solve this, we first say that

Let x² = y

So that,

x⁴ = (x²)² = y²

So, the equation becomes

y² + 8y + 15 = 0

This is a simple quadratic equation, we then solve this

y² + 8y + 15 = 0

y² + 3y + 5y + 15 = 0

y (y + 3) + 5 (y + 3) = 0

(y + 5) (y + 3) = 0

y + 5 = 0 OR y + 3 = 0

y = -5 OR y = -3

But, Recall that x² = y

If y = -5

x² = y = -5

x² = -5

x = √(-5)

If y = -3

x² = y = -3

x² = -3

x = √(-3)

So,

x = √(-5) OR x = √(-3)

Note that

√(-1) = i

√(-5) = √(-1) × √(5)

= i√5

And

√(-3) = √(-1) × √(3)

= i√3

Hence

x = ±i√(5) OR ±i√(3)

Hope this Helps!!!

Answer: I believe it is representing the angular position of a vector

In short, it is a symbol to represent a measured angle.

From the information provided, the storm is travelling at a speed of 30km/hr. In other words, its travelling 30 kilometers every hour. If the storm is 60 kilometers away, then we have the following ratio;

REmember that

A continuous function allows the x-values to be ANY points in the interval, including fractions, decimals, and irrational values

A discrete function allows the x-values to be only certain points in the interval, usually only integers or whole numbers.

Discrete functions have scatter plots as graphs and continuous functions have lines or curves as graphs

Supplementary angles are two angles whose sum is exactly 180, therefore:

162 + x = 180

Solving for x:

subtract 162 from both sides:

x = 180 - 162

x = 18

Given the function:

Where F represents Anumeha's fees (in dollars) for working t hours. The initial fee can be calculated for t = 0:

So the constant fee is $6. Now, we need to calculate how much does she charges each hour. We can calculate the values at t = 1, t = 2, and t = 3:

As we can see, there is a constant increment of $12 for each hour. Then, Anumeha charges $12 for each hour of work.

Given:

it is given that the current population of a threatened animal species is 1.3 ​million, but it is declining with a​ half-life of 25 years.

Find:

we have to find that how many animals will be left in 35 years and in 80 years.

Explanation:

we know 1.3million = 1300000

The decay law is

where t is in years and p(t) is the population at time t.

Now, the number of animals left in 35 years is

Therefore, 492608 animals will be left in 30 years.

Now, the number of elements left in 80 years is

Answer: The answer is no

Step-by-step explanation:

this is because the two short side lengths, which is 5 and 7, they have to be added together, which is 12, and 12 is smaller than 13 (the largest side)

Answer:

No, because 5 + 7 < 13

Step-by-step explanation:

The equation of the line is found as y + 2 = (-2/3)(x - 5).

For the given question.

The passing coordinates of the line is given as;

(x1, y1) = (-1, 7)

(x2, y2) = (5, -2)

Find the slope using the equation.

slope = m = (y2 - y1)/(x2 - x1)

Put the values.

m = (-2 - 7)/(5 + 1)

m = -9/6

m = -3/2

Use the point slope formula to find the equation of line in slope intercept form.

y - y1 = m(x - x1)

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

Thus, the equation of the line is found as y + 2 = (-2/3)(x - 5).

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The elements that are in  ( A ∪ B ) = { 2, 4, 5, 7, 8, 9, 10 , 11, 12, 14, 15, 17, 18, 19, 20}

The elements of the set that are in ( A ∩ B ) = {9, 12, 15, 17, 18 }

This is the term that is used to refer to all of the elements that are contained in a two or more sets which are a subset of the Universal set.

In this case, the union of the set is given as the elements in both A and B written together as { 2, 4, 5, 7, 8, 9, 10 , 11, 12, 14, 15, 17, 18, 19, 20}. All of these values are in A and B.

This is the term that is used to refer to all of the values that would appear in the two sets that are in the subset of the universal set.

Here we have the value of A ∩ B = {9, 12, 15, 17, 18 }

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Solution

The final answer

Answer:

100%

Step-by-step explanation:

All of the numbers are factors of 24. So, picking a factor of 24 is guaranteed, so the probability is 1.

This is equal to 100%.

Concept

First, find the slope of the line, and secondly use a slope-intercept form of the equation to find the equation of the line.

Step 1: find the slope

From the graph, choose two coordinates at the intercept

( 0, 2 ) and ( -2, 0 )

x1 = 0

y1 = 2

x2 = -2

y2 = 0

Substitute the values in slope equation

Step 2: Find the intercept c

The intercept on the y-axis is c = 2

Step 3: Write the equation of a line in slope-intercept form

y = mx + c

Step 4: substitute the values of m and c to find the equation

y = 1(x) + 2

y = x + 2

Final answer

y = x + 2 Jenny's is correct

Answer:

A. (0, 3)

C. (1, 1.5)

Explanation:

A point is a solution to the system if it satisfies both inequalities.

So for each option, we get:

Replacing (x, y) = (0, 3)

y ≥ -2x + 3

3 ≥ -2(0) + 3

3 ≥ 3

y ≤ -x² - x + 4

3 ≤ -0² - 0 + 4

3 ≤ 4

Since both inequalities are satisfied, (0, 3) is a solution.

For (x, y) = (-1, 5)

y ≥ -2x + 3

5 ≥ -2(-1) + 3

5 ≥ 2 + 3

5 ≥ 5

y ≤ -x² - x + 4

5 ≤ -(-1)² - (-1) + 4

5 ≤ -1 + 1 + 4

5 ≤ 4

Since 5 is not lower than 4, (-1, 5) is not a solution

For (x, y) = (1, 1.5)

y ≥ -2x + 3

1.5 ≥ -2(1) + 3

1.5 ≥ -2 + 3

1.5 ≥ 1

y ≤ -x² - x + 4

1.5 ≤ -(1)² - (1) + 4

1.5 ≤ -1 - 1 + 4

1.5 ≤ 2

Since both inequalities are satisfied, (1, 1.5) is a solution.

Therefore, the answers are

A. (0, 3)

C. (1, 1.5)

Statement Problem: Solve for the missing sides of the triangle;

Solution:

The sum of angles in a triangle is 180degrees. Thus,

Since measure angle A and measure angle B are equal. Thus, the triangle is isosceles and the two sides are equal.

We would apply sine rule to find the missing side a.

Thus,

CORRECT ANSWERS:

Answer:

X=16 and X=21

Step-by-step explanation:

6 + 2x-11 = -37

-6                -6                2x-11 =-43

                                           +11    +11  2x =32      

x=16

6+ 2x- 11 = 37

2x-11=31

    +11   +11    2x=42

x =21

Okay, here we have this:

Considering that a real number is said to be irrational if it cannot be expressed as a quotient of whole numbers. ✓2 is an irrational number, and as all the irrational number are real numbers ✓2 is also a real number.

Answer:

He started with at least 34 stamp collection

Explanation:

Let x represent Carlos' initial stamp collection.

From the question, we're told that he sold half of them, bought twelve more, and currently has at least 29, we can go ahead and set up an inequality as shown below;

We can go ahead and solve for x following the below steps;

Step 1: Subtract 12 from both sides of the equation;

Step 2: Multiply both sides by 2;

From the above, we can say that Carlos started with at least 34 stamp collection

We are given the dimensions of a parallelogram and are asked to estimate its area

Recall that the area of a parallelogram of base b and height h is given by the formula

So the area of the parallelogram would be

as 3 1/4 and 5 1/2 are mixed numbers, we need to transform them to fractions

Recall that given a mixed number of the form

we can transform it into a fraction by multiplying the whole number by the denominator and adding the result to the numerator while leaving the denominator fixed. In this case, that is

So, applying this formula to both numbers, we get

and

so the area of the parallelogram would be

so the area of the parallelogram is approximately 18 square yards

Based on the fact that Home Liquidators marked up their merchandise by 35% on cost, the company equivalent markup on selling price is 26%.

The equivalent markup by Home Liquidators on the selling price can be found by the formula:
= Percentage markup / Percentage selling price x 100%

The percentage markup  = 35%

Percentage selling price = (100% + 35%) = 135%

The equivalent markup by Home Liquidators is therefore:

= 35% / 135% x 100%

= 26%

In conclusion, the Home Liquidators has an equivalent markup of 26% on selling price.

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Suppose that an item regularly costs $100.00 and is discounted 22%. If it is then marked up 22%, is the resulting price $100.00? If not, what is it? Choose the correct answer below and, if necessary, fill in the answer box to complete your choice.​

1)

we have

100%-22%=78%=78/100=0.78

so

If is discounted 22%

the new price is 100,000*0.78=$78,000

2) If it is then marked up 22%

the new price is

100%+22%=122%=122/100=1.22

78,000*1.22=$95,160

therefore

The new price is not $100,000

the new price is $95,160

In this case you need to click the 7 which is in the hundred millions place

We will have the following:

2)

A(0, 7) : <7, -3>

B(1, 3) : <7, -3>

C(-1, -4) : <7, -3>

D(-5, 1) : <7, -3>

3)

From the graph we will have the following:

a.

b.

***Explanation***

For point 2, we will simply apply the vector to the corresponding coordinates, that is:

We have the coordinates:

and the vector:

So, in order to determine the final image we will have to follow the transformation rule:

*For point 3, we will simply count the number of units the image has moved to the left or rigth and that will be our transformation rule for the x-axis, and the number of units the image has moved up or down and that will be our transformation rule for the y-axis.

In the case of the problem, the images moved 7 units to the rigth (+7) and then moved 5 units up (+5), so the transformation rule in coordinate notation is given by:

And in order to write it in vector notation, we simply write the units the images move:

Answer:

The decimal form of 2/4 is;

Explanation:

We want to turn the fraction to decimal.

it can be obtained by;

Therefore, the decimal form of 2/4 is;

Using the binomial distribution, the measures are given as follows:

a) Expected value: 28.

b) Variance of 16.8 and standard deviation of 4.099.

The formula for the probability of x successes is:

[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]

[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]

The parameters are given by:

Hence, in the context of this problem, the values of these parameters are given as follows:

p = 0.4, n = 70.

The expected value of the distribution is calculated as follows:

E(X) = np.

Hence:

E(X) = 70 x 0.4 = 28.

The variance of the distribution is calculated as follows:

V(X) = np(1 - p) = 70 x 0.4 x 0.6 = 16.8.

The standard deviation of the distribution is calculated as follows:

sqrt(V(X)) = sqrt(16.8) = 4.099.

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Step 1

Given;

Required; To find the value of y that makes the equation true

Step 2

Find the value of y

Hence, the value of y that makes the equation true is 16/3

A total of 240 households participated in the survey.

91 of then had neither a cat, a dor or a parakeet.

Then, 159 of them had at least one animal.

7 of then had a cat, a dog and a parakeet.

Then, 152 of them had one or two animals between a cat, a dog and a parakeet.

31 of them had a cat and a dog.

Then, 121 of then had a dog only, a cat only, a dog and a parakeet, a cat and a parakeet or a parakeet only. Between these, we want to find the ones who had a parakeet only. Only 91 - 31 = 60 of these 121 households must had at least a dog and only 70 - 31 = 39 of these had at least a cat.

Therefore, the number of households that had a parakeet only is 121 - 60 - 39 = 22

Given the Definite Integral:

You can identify that the interval is:

By definition, if the function is continuous and positive in a closed interval, then:

In this case, you can identify that the function is:

You can graph it using a graphic tool:

Since the closed interval goes from 0 to 1, you need to find this area:

You can identify that you have to find the area of a quarter circle. In order to do it, you can use this formula:

Where "r" is the radius of the circle.

In this case, you can identify that:

Therefore, you get:

Then:

Hence, the answer is: Option D.