complex roots problem

Answer:

The correct answer option is: it is a difference of squares:  (y – 15)(y + 15)

Step-by-step explanation:

We are given a polynomial and we are to determine if it is a difference of squares.

Let us recall the algebraic formulas which include:

[tex](a+b)^2=a^2+2ab+b^2[/tex]

[tex](a-b)^2=a^2-2ab+b^2[/tex]

[tex](a+b)(a-b)=a^2-b^2[/tex]

So if we look closely, we can conclude that the given polynomial observes the third formula of the perfect squares.

Hence, we can say that it is a difference of squares:  (y – 15)(y + 15)

[tex]y^2-225 = (y-15)(y+15)[/tex]

SX is equal to UX

US and Rt are the lines which make the center of the parallelogram. Hence the center of both lines is X so both the lines must be present at the same distance from the mid point. US is divided in two equal parts on point X and we know that center point is always equidistant from the end points. X must be equidistant from both UX and SX so we can say that SX = UX.

Answer:

There are 272 students going on the field trip.

Step-by-step explanation:

68 students on each bus. 4 busses. 68 x 4 = 272

Answer:

The answer is 272 students.

Step-by-step explanation:

1. First, I looked at how many students and buses are there.

2. I looked at the question, "How many students are going on the field trip?"

3. Next, I will multiply the number of students on each bus by the number of buses on there.

4.   68

   x  4

   272

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Hope this helped! Your answer is 272 students. ❤️

Answer:

$12.60

Step-by-step explanation:

To find this, you need to remember this equation:

Starting amount x [tex]\frac{100 - percent}{100}[/tex]

Plug these values in:

18 x [tex]\frac{70}{100}[/tex] = 12.6

So the clearance price was $12.60!

Answer: 4.5kg = 9.9208lbs

4.5kg = 158.733oz

The watermelon weighs approximately 4.5 kg, which can be converted to pounds and ounces by using the conversion factors. It is approximately 9 pounds and 15 ounces after conversion.

A watermelon at the grocery store weighs 4.5 kg. To convert this weight into pounds and ounces, we can use the fact that 1 kg is equivalent to 2.205 pounds (lb) and 1 pound equals 16 ounces.

First, let's find out how much the watermelon weighs in pounds:

Since we want the weight in pounds and ounces, we'll convert the decimal part of the pounds to ounces:

Therefore, the watermelon weighs approximately 9 pounds and 15 ounces (rounding 14.76 ounces to the nearest whole number).

Answer:

x) =g(x) -1  shifts the graph g(x) down 1 unit

Step-by-step explanation:

g(x) = 3x

When we add  to g(x) and make it g(x) +c, we shift the graph vertically,

+c shifts the graph up

-c shifts the graph down

h(x) =g(x) -1  shifts the graph g(x) down 1 unit

Answer:

A quadrilateral has 4 right angles

Step-by-step explanation:

In a conditional statement

If hypothesis, then conclusion

OR

Conclusion, if hypothesis.

The hypothesis goes with the if part.

Answer:

Both A and D are false

Step-by-step explanation:

We expect lower academic performance when unemployment is high, so a lower graduation rate. Dropouts—those who don't graduate—tend to have a higher unemployment rate, so there is cause/effect working in both directions. Thus graduation rate and unemployment would be negatively correlated. (One study showed the correlation coefficient to be about -0.11.)

Because D is false, A is also false.

Answer:

f(-2)= -8

f(-1) = -1

f(0)= 0

Step-by-step explanation:

f(x) = x^3

if x =-2

f(-2) = (-2) ^3 = -2*-2*-2 = -8

if x =-1

f(-1) = (-1) ^3 = -1*-1*-1 = -1

if x =0

f(0) = (0) ^3 = 0*0*0 = 0

Answer:

Graph 4

Step-by-step explanation:

for part B

Answer:  10

Step-by-step explanation:

Multiplying a complex number by -1 flips it across the origin on the complex plane, changing its direction by 180 degrees but not its magnitude, resulting in a point directly opposite to the initial position.

The question asks about the effect of multiplying a complex number by -1 in the complex plane. Multiplying a complex number by -1 essentially flips the point representing the complex number across the origin. If Point A represents a complex number on the complex plane, multiplying that complex number by -1 will result in a point that lies exactly opposite of Point A with respect to the origin. This operation does not change the magnitude of the complex number but changes its direction by 180 degrees. This is because the complex plane is analogous to a two-dimensional Cartesian coordinate system where complex numbers are represented as vectors. The multiplication by -1 is a reflection across the origin in such a plane.

For example, if a complex number z is represented by the point (a, b) where a is the real part and b is the imaginary part, then multiplying z by -1 gives us the point (-a, -b). This operation is similar to rotating the vector z 180 degrees around the origin or mirroring it across both the x and y axes.

Final answer:

By converting the total amount of pizza into an improper fraction and dividing it by the portion each student ate, it's determined that 13 students were fed.

Explanation:

To find out how many students were fed, we first need to convert the total amount of pizza available into a form that can be easily divided by the portion each student eats. The total pizza available is 3 1/4 small pizzas. Since each student ate 1/4 of a pizza, we can see how many times 1/4 fits into 3 1/4 to determine the number of students.

We convert 3 1/4 into an improper fraction to make the calculation easier. 3 1/4 is equivalent to 13/4. Now, we divide 13/4 by 1/4 to find out how many students were fed. This is equivalent to multiplying 13/4 by the reciprocal of 1/4, which is 4/1.

13/4 × 4/1 = 13, meaning that 13 students were fed.

Answer:

50

Step-by-step explanation:

if x years past  she is twice her daughter's age,

so  we get:

28+x=2(3+x)

x=22,    22+28=50

Answer:

Step-by-step explanation:

Thank you that helped me with mine

eg:

L is 26, C is 4, how many years until L is 2 times as old as C?

26+x=2(4+x)

26+x=8+2X

-8 -8

18+x=2x

-x -x

18=1x

in 18 years L will be 2 times as old as C

Answer:

$8779.52

Step-by-step explanation:

24% = 0.24.

Each year the value of the car = 1 - 0.24 = 0.76 of the previous year.

Value after 3 years = 20,000 * (0.76)^3

=  $8779.52

Answer:

P(1+r) = p(1+0.11)= p+0.11p=1.11p

Step-by-step explanation:

The merchandise is marked up 11%. This means you pay 100% of the price plus 11%. We can represent that as (1+r) where r is the percent marked above. For 11%, this expression would be 1+0.11. We multiply that by the price p. p(1+0.11). This simplifies to p+0.11p. We can further simplify it to 1.11p.

Answer:

p + 0.11p

i did the test

The measure of the angle 1 cannot be determined

From the question, we have the following parameters that can be used in our computation:

The pentagons ABCDE and FGHIJ

Given that pentagon ABCDE ≅ pentagon FGHIJ

We can see that there is no occurrence of the angle 1 in both figure

This means that the measure of the angle 1 cannot be determined

Read more about angles at

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Answer:

I would say...

C.)x - 5 = 3 (x + 2)

Really really sorry if I'm wrong...

One thing I can say is that when it says 5 less than a #, that means the # is being subtracted from another #...

The correct equation for the situation 'Five less than a number is equal to three times the sum of the number and two' is x - 5 = 3(x + 2).

The correct equation for this situation is C.) x - 5 = 3(x + 2).

Here's how you can decipher the sentence: 'Five less than a number' translates to 'x - 5' in mathematical terms where 'x' stands for the number. 'Is equal to' signifies the equality sign '='. Finally, 'three times the sum of the number and two' corresponds to '3(x + 2)', where 'x' is the number, '2' is the two and '3' the three times mentioned in the equation. So, putting it all together gives you

x - 5 = 3(x + 2).

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To find the number of answers that are not choice B, subtract the number of answers that are choice B from the total number of questions.

To find the number of answers that are not choice B, we first need to calculate the number of answers that are choice B. Since 25% of the answers are choice B, we can multiply the total number of questions (20) by 0.25 to find that there are 5 answers that are choice B. To find the number of answers that are not choice B, we subtract the number of answers that are choice B from the total number of questions. So, the number of answers that are not choice B is 20 - 5 = 15.

Answer:

$8.40

Step-by-step explanation:

We can write a proportion to find the total amount last year using the information given. A proportion is two equivalent ratios set equal to each other.

[tex]\frac{125}{100}=\frac{10.50}{y}[/tex]

We will cross multiply the numerator of one ratio with denominator of the other. And then solve for y.

125(y)=100(10.50)

125y=1050

y=8.40

Joe has 8 green pepper plants and 28 red pepper plants in his garden.

Let's denote the number of green pepper plants as G and the number of red pepper plants as R.

According to the given information, the ratio of green pepper plants to red pepper plants is 2 to 7.

This can be written as G:R = 2:7.

It is also mentioned that there are 20 more red pepper plants than green pepper plants. This can be written as R = G + 20.

Now, we can substitute the value of R from the second equation into the first equation:

G:G+20 = 2:7

By cross-multiplying, we have 7G = 2(G+20).

Simplifying the equation, we get 7G = 2G + 40.

Subtracting 2G from both sides, we have 5G = 40.

Dividing both sides by 5, we get G = 8.

Therefore, there are 8 green pepper plants and 8 + 20 = 28 red pepper plants in Joe's garden.

Answer:

Option B is correct.

By ASA rule are these triangles are congruent

Step-by-step explanation:

In triangle JMK and triangle JMN

[tex]\angle KJM \cong \angle NJK[/tex]   [Angle]         [Given]

[tex]JM \cong JM[/tex]   [Common Side]  

[tex]\angle JMK \cong \angle JMN [/tex]   [Angle]

ASA(Angle-Side-Angle) theorem states that if two angles and the included  side of one triangle are congruent to the corresponding parts of another triangle, then these triangles are congruent.

then, by ASA theorem;

[tex]\triangle JMK \cong \triangle JMN[/tex]

Therefore, by ASA rule are these triangles are congruent.

The rules AAS, ASA, SAS, SSS are a set of criteria that can determine if two triangles are congruent. They need accurate measurements of angles and sides of the triangles to be applied. Without these specifics, it's hard to identify which rule applies.

In order to answer which rule makes the triangles congruent, we would need more specific information about these triangles, such as the measures of their angles and sides. However, let me explain what each of these rules represents:

Without specific information about your triangles, it's difficult to conclusively establish which rule applies.

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[tex]\frac{y-307,650}{x-9} = 850\\\\y-307,650 =850(x-9)\\\\multiply\\\\y =307,650 +850(x -9)\\\\y =307,650+850(16-9)\\\\y= 313,600[/tex]

The linear equation can be formed as P = P0 + rt. Replacing each variable with the values from the problem, we find that the population of Beth's town on her 16th birthday will be approximately 319,600.

The question refers to a situation of linear growth. It states that the population of Beth's town grows at a constant rate of 850 people per year. If on Beth's 9th birthday the population was 307,650, we can create a linear equation to find the population when she turns 16. This linear equation can be represented as follows: P = P0 + rt, where P is the future population, P0 is the initial population, r is the rate of growth, and t is the time elapsed.

In Beth's situation, we will let her 9th birthday be the starting point (time zero). So, P0 is 307,650, r is 850, and t is 7 (the years from her 9th birthday to her 16th birthday). Plugging these values into our equation gives us P = 307,650 + 850 * 7. Solving the equation gives us P = 313,650 + 5,950 = 319,600. Therefore, the estimated population of Beth's town on her 16th birthday is 319,600.

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Answer:

617.5

Step-by-step explanation:

If you expand the series by putting in [tex]n=1,n=2,n=3...[/tex] values, you will see:

68.7, 66.4, 64.1, ....

To find common difference (d) (difference in a term and its previous term) we take any term and subtract from it the term before it:

[tex]66.4-68.7=-2.3[/tex]

The sum of arithmetic series formula is:

[tex]S_{n}=\frac{n}{2}[2a+(n-1)d][/tex]

Where,

Substituting these values, we get:

[tex]S_{50}=\frac{50}{2}[2(68.7)+(50-1)(-2.3)]\\S_{50}=25[137.4+(49)(-2.3)]\\S_{50}=25[24.7]\\S_{50}=617.5[/tex]

Last answer choice is right.

Answer: D. 617.5 hope that helps !

Answer:

All the fields will be harvested in 6.25 days

Step-by-step explanation:

because 75 ÷ 12 and 62.5 ÷ 12 is 6.25

Answer:

The focii are 8 feet apart

Step-by-step explanation:

You can use the formula

F = √(a^2 - b^2)   where F is the distance of the focii from the center , a = length of the semi major axis and b = length of the semi minor axis)

So here it is  √(5^2 - 3^2)

= √16 = 4

So the distance is 2*4 = 8

Quadratic relations and comic sections unit test part 1

12. b. 8 feet

1. b ellipse

domain -4<=x<=4

range -3<=y<=3

2. c. x^2/3

3. c. 1/10 x^2

4. b. 5 inches

5. d. x=1/12 (y-4)^2 +2

6. b. (x-4)^2 + (y-5)^2 =49

7. b. (x+8)^2 + (y+4)^2 =25

8. d. (x+3)^2 + (y+2)^2 =9

9. a. center at (7,-6); radius 4

10. b. x^2/25 + y^2/169 =1

11. a. (0, +/- 6)

12. b. 8 ft

13. c. (put equation in graphing calculator to see graph)

14. d. (0, +/-5)

B - Brandon's age

4B - Michael's age

B + 27 - Michael's age

The equation:

4B = B + 27       subtract B from both sides

3B = 27      divide both sides by 3

B = 9

4B = 4(9) = 36

The total number of observations is

2+9+16+12+8+6+4+2+1=60

The first five counts refer to 0 to four cars:

2+9+16+12+8=47

The probability is the fraction less than five,

p= 47/60 = 0.783333...

Answer: 78%

Answer:

59%

Step-by-step explanation:

First let us work out the total number of cars waiting in the  given period.

= 0 *2 + 1*9 + 2*16 + 3*12 + 4*8 + 5*6 + 6*4+7*2+8*1

= 185

Now the number when there are less than 5 cars in line ( that is when there are 0 - 4 cars in line) =

0*2 + 1*9 + 2*16 +3*12+4*8

= 109

Thus the required probability = 109/185

= 0.589

= 59%  (answer)

Answer:

length of each plan A work out: 1 hour

length of plan B work out: [tex]\frac{1}{2}[/tex] hours

Step-by-step explanation:

Let x represents the time taken to do plan A

y represents the time taken to do plan B

On Monday there were 5 clients who did Plan A and 2 who did Plan B.

Miguel trained his Monday clients for a total of 6 hours

5x + 2y = 6 -----------> equation 1

On Tuesday there were 3 clients who did Plan A and 8 who did Plan B. .He trained his Tuesday clients for a total of 7 hours

3x + 8y = 7  -------------------> equation 2

Now we solve for  x  and y

Let multiply the first equation by -4 to eliminate y

-20x -8y = -24

  3x + 8y = 7

------------------------ (add both equations)

-17x    = -17

Divide both sides by -17

So x= 1

Plug in 1 for x  in first equation and  solve for y

5x + 2y = 6

5(1) + 2y = 6

5 + 2y =6

Subtract 5 on both sides

2y = 1

y = 1/2

length of each plan A work out: 1 hour

length of plan B work out: [tex]\frac{1}{2}[/tex] hours