Please I need help with this question

Answer:

x = -2+√3i and -2-√3i

Step-by-step explanation:

The formula for the general formula is expressed as;

x = -b±√b²-4ac/2a

Given the expression

x²+4x+7 = 0

a = 1, b = 4 and c = 7

Substitute

x = -4±√4²-4(1)(7)/2(1)

x  = -4±√16-28/2

x = -4±√-12/2

x = -4±√4*-3/2

x = -4±2√-3/2

x = -4±2√3i/2

x = -4+2√3i/2 and  -4-2√3/2

x = -2+√3i and -2-√3i

Answer: (-4,0)

Step-by-step explanation:

Answer: A

Step-by-step explanation:

- Left and right translations affect the x-coordinate

- subtract 4 from the x-coordinate

Answer: The product of a positive integer and a negative integer is negative. RULE 2: The product of two positive integers is positive. RULE 3: The product of two negative integers is positive.

When you multiply a negative number by a positive number then the product is always negative

HOPE THIS HELPS

SUKHMANJOT

Chart relating to the question is attached below.

Answer:

349 students

Step-by-step explanation:

Based on the chart given, we can obtain the experimental probability or proportion for the travel plan of 75 students :

Proportion who would be traveling by car :

Number traveling By car / number of samples

p(car) = 23 / 75 = 0.30666

If total number of students = 1138

Using the proportion obtained from the sample, the number of students who would be traveling by car from the population would be :

= 0.30666 * 1138

= 348.98 students

= 349 students

Answer:

I think D is right, because usually congruent angles have the same angle measure, and there's no answer choice for 1 and 3.

Step-by-step explanation:

the answer is 108 because your counting by 12

Answer:

Hello There!!

Step-by-step explanation:

I believe the answer is 108.

hope this helps,have a great day!!

~Pinky~

The men’s world record mile run time in 1940 would have been 10.454 seconds

Here, the equation of the linear function that best fits the data (the line of best fit) is Finishing time = 10.878 - 0.0106(Year after 1900)

Let k be the finishing time in seconds and t be the number of years after 1900

So, the equation of regression line becomes,

k = 10.878 - (0.0106) t

To find the the men’s world record mile run time in 1940 first we find the the number of years (t)

t = 1940 - 1900

t = 40 years

So, the finishig time (k) would be,

k = 10.878 - (0.0106) × 40

k = 10.454 seconds

Therefore, the finishing time was 10.454 seconds

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Answer:

The answer is "4.3".

Step-by-step explanation:

Given:

[tex]\to x^3 - 5x - 59 = 0[/tex]

When [tex]x = 4.1:[/tex]  

[tex]\to f(4.1) = (4.1)^3 - 5(4.1) - 59 = -10.579[/tex]

When [tex]x= 4.2:[/tex]

[tex]f(4.2) = 4.2^3 - 5(4.2) - 59 = -5.912[/tex]

When [tex]x = 4.3:[/tex]

[tex]\to f(4.3) = -0.993[/tex] (closer to 0)

[tex]\to f(4.4) = 4.184[/tex]

When [tex]x = 4.35:[/tex]

[tex]\to f(4.35) = 1.563[/tex]

When the root is closer to 4.3 than 4.4 So, 1.563 is closer to zero than 4.184.

When [tex]x = 4.32:[/tex]

[tex]\to f(4.32) = 0.0216[/tex] close to zero.

So the answer is 4.3 to 1 decimal place.  

Answer:

1. 14

2. 2.83

3. 6.71

4. 8.77

5. 9.22

6. 5.20

7. 2.45

8. 19

9. I would love to help you with this but I don't know what it means by "circled problems"

Step-by-step explanation:

Answer:

Circle questions 2, 3, 4, 5, 6, 7

Simplified square root:

1. 14

2. 2.8

3. 6.7

4. 8.8

5. 9.2

6. 5.2

7. 2.4

8. 19

Step-by-step explanation:

I'm sure you can do the line plot. It's pretty mandatory.

Question #9:

If a number can be written or can be converted to p/q form, where p and q are integers and q is a non-zero number, then it is said to be rational and if not then it is irrational.

If you don't understand how to draw a line graph then check the two photos as a guide. Hope it helped :)

The required point-slope form of the equation of the line is y - 20= -5(x + 1).

Given that, To determine an equation in point-slope form for the line that passes through the point with the given slope. point: (-2,-20) and m=-5.

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The number of units that tile will he need to surround his pool is 19.82units.

this question is of quadratic equation ,

The number of units of tile simply refers to the perimeter.

So, we need to find all the sides of the rectangle.

Now, we have,

AB = 4.24 units

BD = 7.07 units.

So, we can find AD using pythagoras theorem.

So,

(AD)² + 4.24² = 7.07²

(AD)² + 17.978 = 49.985

(AD)² = 49.985 - 17.978

AD = √32.007

AD = 5.66 units

AD = BC = 5.66 units

Likewise, AB = DC = 4.24 units

Thus,

perimeter = 2(5.66) + 2(4.24) = 19.8 units.

The number of units that tile will he need to surround his pool is 19.82units.

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The probability best prediction for the number of times that Ellen will draw a blue marble is 200.

Number of blue marbles: 222

Number of red marbles: 333

Total number of marbles: 555

Probability of drawing a blue marble:

222/555

= 0.4

Number of times drawing a blue marble:

300300300 x 0.4

= 120,120,120

Rounded to nearest whole number:

120,120

Ellen has a bag with 333 red marbles and 222 blue marbles in it. She is going to randomly draw a marble from the bag 300300300 times, putting the marble back in the bag after each draw. The best prediction for the number of times that Ellen will draw a blue marble is 200. This prediction is based on the fact that there are more red marbles than blue marbles in the bag. To calculate this, we first need to determine the probability of drawing a blue marble; there are 222 blue marbles out of 555 total marbles, so the probability is

222/555

= 0.4.

Multiplying this by the total number of draws (300300300) gives us 120,120,120. Rounding this to the nearest whole number gives us our prediction of 200 times.

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Answer:

True

Step-by-step explanation:

e^{i\pi} + 1 = 0

Simplifying and therefore meaning that the answer is true.

But in all seriousness 6*3 = 18

6*4a = 24a

So yes it is true :)

Answer:62

Step-by-step explanation: if you divide 10mm by 8mm you will get the celcius of negative 98mm then count the right angle vice versa and you will get 62

The area of ΔADC is equal to 6 unit².

The total area that is bounded by a triangle's three sides is referred to as the triangle's area. In essence, it is equal to 1/2 of the height times the base, or A = 1/2 b h.

A abc = A adc because the areas of the initial and reflected triangles are equal.

Using the formula area=1/2 base height, determine the area of triangle ABC.

ABC in a triangle:

base = 4 units + AC

height = 3 units + BE

AΔ= abc = 1/2×4×3 =6 unnit²

Hence,

 ΔADC = 6 unit²

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Answer: A problem is said to be intractable if there is no efficient algorithm to solve it.

Intractable problems are common. We need to discuss how we approach it when we actually encounter it.

Step-by-step explanation:

How many colours do you need to colour a graph such that no adjacent vertices are of the same colour showed in the image below?

Conclusion : Provided the graph with a large number of vertices, we see that we are again faced with resorting to a systematic tracing of all paths, comparison of the neighbour's colours, backtracking, etc resulting in exponential time complexity once again.

Answer:

87$

Step-by-step explanation:

The two quantities in Jada’s situation that are in a functional relationship are the number of hours she works (independent variable) and the amount of money she earns (dependent variable).

The two quantities in Jada’s situation that are in a functional relationship are the number of hours she works and the amount of money she earns. The number of hours worked is the independent variable because it is the variable that affects the amount of money earned. The amount of money earned is the dependent variable because this is the variable that is dependent on the number of hours worked.If she works 8 hours, she would earn $56.Jada earns $7 per hour, so if she works 3 hours, she would earn

$21 (3 x 7 = 21).

If she works 5 hours, she would earn

$35 (5 x 7 = 35).

If she works 8 hours, she would earn

$56 (8 x 7 = 56).

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9514 1404 393

Answer:

  £6/h

Step-by-step explanation:

Molly is paid £280 for 35 hours' work, so

  £280/(35 h) = £8/h

In the next 5 hours, her pay jumps to £350, so she earns at a rate of ...

  (£350 -280)/(5 h) = £70/(5 h) = £14/h

The difference in her pay rates is £14/h -£8/h = £6 per hour.

Answer:

Step-by-step explanation:

You don't seriously want someone to answer all those problems, do you?

I will tell you that you need to use the Pythagorean theorem, the side relationship in a 30-60-90 and a 45-45-90 triangle.   Get off your rear and go for it!!!

One mole of H2 contains 6.022 x 10^23 H2 molecules. This can be used to calculate the number of H2 molecules in a given volume or mass of hydrogen gas.

A mole is a unit of measurement in chemistry that expresses the amount of a substance. It is defined as the number of entities (such as atoms, ions, or molecules) in a sample of the substance. The number of entities in one mole of a substance is known as Avogadro's number.

Avogadro's number is a fundamental constant of physics and chemistry, defined as the number of atoms, ions or molecules in one mole of substance. It is approximately 6.022 x 10^23 and is used in many calculations in chemistry and physics, such as the number of atoms in a sample of an element, the number of ions in a salt, or the number of molecules in a gas sample. The constant is named after Amedeo Avogadro, an Italian scientist who first proposed the concept in 1811.

One mole of a substance is equal to Avogadro's number, which is approximately 6.022 x 10^23.

The mole of H2 (hydrogen gas) is the number of H2 molecules in a sample of hydrogen gas. One mole of H2 contains 6.022 x 10^23 H2 molecules. This can be used to calculate the number of H2 molecules in a given volume or mass of hydrogen gas.

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The value of {a} in the given modelled statement equation is 5.

In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign "=".

Given is that the ages of three cats are (a) , (a + 4) and (2a - 3). Their total age is 21.

We can model the given equation is -

(a) + (a + 4) + (2a - 3) = 21

a + a + 4 + 2a - 3 = 21

4a + 1 = 21

4a = 20

a = 5

Therefore, the value of {a} in the given modelled statement equation is 5.

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{

Complete question is given below -

The ages of three cats are a, a+4 and 2a-3. Their total age is 21. Determine a.

}

Answer:

D

Step-by-step explanation:

Edge

The limit of x approaching infinite of a function gives it's horizontal assymptote. We use this to solve the question, getting the following answer:

Because Limit of f (x) as x approaches plus-or-minus infinity = 16, the function has a horizontal asymptote at y = 16.

Horizontal asymptote:

An horizontal asymptote is the value of y given by:

[tex]y = \lim_{x \rightarrow \infty} f(x)[/tex]

In this question:

[tex]f(x) = \frac{16x^2 - 35}{x^2 - 5}[/tex]

The horizontal asymptote is:

[tex]y = \lim_{x \rightarrow \infty} f(x) = \lim_{x \rightarrow \infty} \frac{16x^2 - 35}{x^2 - 5}[/tex]

Considering it is a limit of x going to infinite, we just consider the terms with the highest exponents both in the numerator and in the denominator, so:

[tex]y = \lim_{x \rightarrow \infty} \frac{16x^2 - 35}{x^2 - 5} = \lim_{x \rightarrow \infty} \frac{16x^2}{x^2} = \lim_{x \rightarrow \infty} 16 = 16[/tex]

Thus, the correct answer is:

Because Limit of f (x) as x approaches plus-or-minus infinity = 16, the function has a horizontal asymptote at y = 16.

From the graph of the function, given at the end of this answer, you can check that as x goes to infinity, y(green line) approches 16(blue line).

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If p(x) is a polynomial function with p ( 3/4 ) = 0 , then the function has a factor of (4x – 3).

Polynomial is an expression consisting of indeterminates and coefficients, that involves only the operations of addition, subtraction, multiplication, and positive-integer powers of variables

If p(x) is a polynomial function with p ( 3/4 ) = 0

Then we need to find which of the given statements are true.

A. The function has a factor of (4x + 3).

If x=3/4 then 4(3/4)+3 which is not equal to zero

B. The function has a factor of (4x – 3).

If x=3/4 then 4(3/4)-3 which is equal to zero

C. The function has a factor of (3x + 4).

If x=3/4 then 3(3/4)+4 which is not equal to zero

D. The function has a factor of (3x – 4).

If x=3/4 then 3(3/4)-4 which is not equal to zero

Hence, If p(x) is a polynomial function with p ( 3/4 ) = 0 , then the function has a factor of (4x – 3).

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Jacks meeting lasted for 160 min or 2 hrs 40 min.

Time is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future.

Given is that jacks meeting stared at 2:45 pm and ended at 5:25 pm.

The time for which the meeting lasted can be written as -

{i} = 2:45 pm

{i + 60 minutes} = 3:45 pm

{i + (2 x 60) minutes} = 4:45 pm

{i + (2 x 60 + 40) minutes} = 5:25 pm

{f} = 5 : 25 pm

The meeting lasted for -

2 x 60 + 40

160 minutes

or

2 hours 40 minutes

Therefore, Jacks meeting lasted for 160 min or 2 hrs 40 min.

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Answer:

Researchers found that mild allergic reactions may help prevent severe reactions to the same allergin n the future.

Step-by-step explanation:

I currently have this on IXL & I got it correct.

Answer:

4in squared

Step-by-step explanation:

We know that cubes have equal parts all around, and it is basic knowledge for the most part to know 4x4x4 = 64. Therefore, each length must be 4, length, width,and height are all 4.

Answer:

m=20

Step-by-step explanation:

Solve the equation:

7m - 8 = 3 ( 2 m + 4)

Multiply 3 and (2m+4)

7m - 8 = 6m + 12

Add 8 to each side

7m = 6m + 20

Subtract 6m from both sides

m = 20

If my answer is incorrect, pls correct me!

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Answer: Let x be the number of piles of wood that Mr. Anderson made.

We know that he sold 25 pieces of wood to his neighbor, and the rest of the pieces of wood were divided into piles around his house, with each pile containing 40 pieces of wood.

Therefore, we can set up the equation:

185 pieces - 25 pieces = x * 40 pieces

Simplifying the equation:

160 = x * 40

To find the value of x, we need to divide 160 by 40

160/40 = x

x = 4

Therefore, Mr. Anderson made 4 piles of wood after he sold 25 pieces of wood to his neighbor.

It's worth noting that this equation was used to find the number of piles of wood Mr. Anderson made after selling 25 pieces to his neighbor, and assuming that he didn't use the rest of the wood for anything else except for making the piles.

Step-by-step explanation: