please helpppppppppp

Answer:

A.

Step-by-step explanation:

I just did this problem and guessed correctly.

The complex solutions of which equation have a real component of 4 is x² - 8x +16 +21 = 0.

Complex numbers are numbers that consist of two parts — a real number and an imaginary number.

On solving all equation the correct one is x² - 8x +16 = -21.

Using discriminant method calculating the roots

x² - 8x +16 +21 = 0

x² - 8x + 37 = 0

x= -b ± √b² -4ac / 2a

x= 8 ± √ -8² - 4*1 * (37) /2a

x= 8 ± √- 84 / 2

x= 8 ± √2² *(- 21) /2

x=( 8 ± √2² *√21 i)/2

x= 8 / 2 ± 2i√21/2

x= 4 ± √21 i

So, x = 4+ √21 i and x= 4 - √21 i

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Answer:

cOULD BE

Step-by-step explanation:

Step-by-step explanation:

Distribute first: 0.3(-4x+20), multiply 0.3 by -4x and 0.3 by 20, to get -1.2x+6. Then, add -1.2x and 8.8x, which gives you 7.6x.

The final answer is 7.6x-7.

Answer:

4x10^6

can you also please mark me as brainliest?

Answer:

A

Step-by-step explanation:

We have a table listing the number of minutes Trayvon practiced the Backstroke and Butterfly on Monday, Wednesday, and Friday.

We want to find event that Trayvon spent more time practicing.

To do so, we add up all the minutes of one event and compare this to the total minutes of the other event.

Therefore, we can eliminate options C and D. These two options evaluate the time on Wednesday compared to other days, but we want to do is to find which event did Trayvon spend the longest on.

So, let's add up all the minutes spent doing the Backstroke. Trayvon over the course of the three days spent 12.5 mins, 15.67 mins, and 9.32 mins.

Therefore, the total minutes Trayvon spend practicing the Backstroke is:

[tex]12.5+15.67+9.32=37.49\text{ mins}[/tex]

Now, let's add up all the minutes spent doing the Butterfly. Trayvon spent 14.333 mins, 12.1 mins, and 10.78 mins over the course of three days. So, the total time spent doing the Butterfly is:

[tex]14.333+12.1+10.78=37.213\text{ mins}[/tex]

Trayvon spent a total of 37.49 minutes doing the Backstroke and 37.213 minutes doing the Butterfly.

37.49 is greater than 37.213. So, Trayvon spent more time practicing the Backstroke.

So, our correct answer is A.

There are some number and calculation errors in B.

And we're done!

Answer:

C

Step-by-step explanation:

On Monday he spent 12.5 min on backstroke and 14.33 min on butterfly.

He spent 26.83 min practicing at the Monday event.

On Wednesday: 15.67 min on backstroke and 12.1 min on butterfly.

He spent 27.77 min on practicing at the Wednesday event.

On Friday: 2.32 min on backstroke and 10.78 min on butterfly.

He spent 13.1 on practicing at the Friday event.

So, he spent more time at the Wednesday event.

Answer:

30(-2) = -60

Step-by-step explanation:

The change in speed from a higher location to a lower location is 2 m/s, v = -2 m/s (from higher to lower)

We need to find the equation that models the change in the bird's position at 30 seconds.

Distance = speed × time

change in position = (-2) × 30

= -60

Hence, the correct option is (B).

Step-by-step explanation:

Answer:

one solution

Step-by-step explanation:

3x-1=3

Add 1 to each side

3x-1+1=3+1

3x = 4

Divide by 3

3x/3 = 4/3

x = 4/3

There is one solution

Answer:

One solution

Step-by-step explanation:

3x=4

x=4/3

no other answer

Answer: The answer is

1. 0 and 3

2. Two

3. No

Step-by-step explanation:

I took the test and it's right

The graph of the function has zeros of 0 and 3, two distinct real zeros, and no complex zeros.

It is defined as a special type of relationship and they have a predefined domain and range according to the function.

We have a function:

[tex]\rm y= x^2(x^2 - 6x + 9)[/tex]

We can write it as a:

[tex]\rm y= x^2(x^2 - 2(3)(x)+ 3^2)[/tex]

[tex]\rm y = x^2(x-3)^2[/tex]

To find the zeros equate to the function with the zero.

y = 0

[tex]\rm x^2(x-3)^2=0[/tex]

First, take [tex]\rm x^2= 0[/tex] we get:

x = 0

Now

[tex]\rm (x-3)^2=0[/tex]

x - 3 = 0

x = 3

Thus, the graph of the function has zeros of 0 and 3, two distinct real zeros, and no complex zeros.

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Step-by-step explanation:

Distribute the 6 to the first matrix and add the result of the first matrix to the second matrix

Answer:

The equation of the parallel line is y = 2x  

Step-by-step explanation:

The slope-intercept form of the linear equation is:

y = m x + b, where

Parallel lines have the same slopes and different y-intercepts

∵ The equation of the given line is 4x - 2y = 6

→ To find the slope of this line re-arrange it to be in the

   slope-intercept form Subtract 4x from both sides to move x to

   the right side

∵ 4x - 4x - 2y = 6 - 4x

∴ -2y = 6 - 4x

→ Divide both sides by -2 to make the coefficient of y = 1

∵ [tex]\frac{-2y}{-2}=\frac{6}{-2}-\frac{4x}{-2}[/tex]

∴ y = -3 - (-2x)

∴ y = -3 + 2x

→ Swithch -3 and 2x

∴ y = 2x - 3

→ Compare it by the form of the equation above to find m

∴ m = 2

∴ The slope of the given line is 2

∵ The two lines are parallel

∴ The slope of the parallel line is 2

→ Substitute it in the form of the equation above

∴ y = 2x + b

→ To find b substitute x and y in the equation by the coordinates

   of any point on the line

∵ The line passes through the point (1, 2)

∴ x = 1 and y = 2

∵ 2 = 2(1) + b

∴ 2 = 2 + b

→ Subtract 2 from both sides to find b

∴ 2 - 2 = 2 - 2 + b

∴ 0 = b

∴ y = 2x

The equation of the parallel line is y = 2x    

Answer:

B.

Step-by-step explanation:

Change the denominators to a common one, then change the numerators accordingly. You can also use math///w4y

Answer:

B.

60 x h

Step-by-step explanation:

Because in she can 60 mph so for every hour she can drive 60 miles. And to find out the total miles she can drive in h hours we would have to multiply

Answer:

False

Step-by-step explanation:

13+5=18

2*4=8

8-5=3

The given solution x=4 is false for 2x-5 = 13.

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides. LHS = RHS is a common mathematical formula.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given:

2x−5 = 13

Now, for x=4

2(4)- 5

= 8-5

= 3

As, the LHS part of equation is not equal to RHS part.

Hence, the given x=4 is false for 2x-5 = 13

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Answer:

165.6

Step-by-step explanation:

165.6 is 72% of 230  

Answer:

Every inch is represents 150 feet

Answer: They are equal

Step-by-step explanation:

Y+5=7 subtract 5 from both sides

Y=2

5Y=10 divide both sides by 5

Y=2

Answer:

3 pizzas

24 slices.

Step-by-step explanation:

Given:

Delivery fee = $7.50

Charges per pizza = $14

Total money available with Jacque = $60

Number of slices in one pizza = 8

To find:

The number of pizzas, [tex]P[/tex] that Jacque can buy and

The number of slices, that Jacque can afford.

Solution:

Cost of one pizza = $14

Cost of [tex]P[/tex] pizzas = $14 [tex]\times P[/tex]

Out of total money of $60, $7.50 will be used as delivery charge.

Therefore, money that can be used for buying pizza = $60 - $7.50 = $52.50

Now, the money available must be greater than or equal to the cost of [tex]P[/tex] pizzas:

i.e. $52.50 [tex]\geq[/tex] [tex]\$14P[/tex]

[tex]\Rightarrow P = 3[/tex]

A maximum of 3 pizzas can be bought.

Number of slices that Jacque can afford = 3 [tex]\times[/tex] 8 = 24 slices

Answer: 4 1/2 and 9/2

Step-by-step explanation: 5/10 can be simplifed into 1/2 and for the improper fraction, you just turn the 4 into halves which is 8 halves

Answer:

4.5 as a mixed number is 4 1/2 and as a improper fraction it is 9/2

Answer:

50%

Step-by-step explanation:

15=30x

x=0.5

x=50%

Answer:

50% Discount

Step-by-step explanation:

So look to get the discount do the math like this:

30 rupees discount is 15 rupees

∴1 rupees discount is 15/30 rupees

∴ 100 rupees discount is 0.2×100 rupees

                                      ⇒50 Rupees

∴The Discount is 50%(Ans:)

Answer:

The third is correct.

Step-by-step explanation:

Preimage: A(2,3), B(5,6), C(8,6), D(8,3)

Image: A'(-2, 6); B'(-5,3); C'(-8,3); D'(-8,6)

Option 3.

                Translation              Rotation 180° Clockwise

                   (x, y-9)                              (-x,-y)

A(2,3)            (2,-6)                              A' (-2,-6)

B(5,6)            (5,-3)                              B' (-5,3)

C(8,6)            (8,-3)                              C' (-8,3)

D(8,3)            (8,-6)                               D' (-8,6)

Transformation involves changing the position of a shape.

The sequence of transformation is: (d) A translation rule by [tex]\mathbf{(x,y) \to (x, y - 9)}[/tex] and then a 180 degrees clockwise rotation about the origin

The coordinates of the pre-image is:

[tex]\mathbf{A = (2,3)}[/tex]

[tex]\mathbf{B = (5,6)}[/tex]

[tex]\mathbf{C = (8,6)}[/tex]

[tex]\mathbf{D = (8,3)}[/tex]

Of the given sequence of transformations, option (d) is correct.

The proof is as follows.

First, translate ABCD by (x, y - 9)

So, we have:

[tex]\mathbf{(x,y) \to (x, y - 9)}[/tex]

[tex]\mathbf{(2,3) \to (2, -6)}[/tex]

[tex]\mathbf{(5,6) \to (5, -3)}[/tex]

[tex]\mathbf{(8,6) \to (8, -3)}[/tex]

[tex]\mathbf{(8,3) \to (8, -6)}[/tex]

Next, rotate by 180 degrees.

The rule of this transformation is:

[tex]\mathbf{(x,y) \to (-x,-y)}[/tex]

So, we have:

[tex]\mathbf{(2,-6) \to (-2,6)}[/tex]

[tex]\mathbf{(5,-3) \to (-5,3)}[/tex]

[tex]\mathbf{(8,-3) \to (-8,3)}[/tex]

[tex]\mathbf{(8,-6) \to (-8,6)}[/tex]

From the graph, the coordinates of the image are:

[tex]\mathbf{A" = (-2, 6)}[/tex]

[tex]\mathbf{ B" = (-5,3)}[/tex]

[tex]\mathbf{C" = (-8,3)}[/tex]

[tex]\mathbf{D" = (-8,6)}[/tex]

Hence, the sequence of transformation is:

(d) A translation rule by [tex]\mathbf{(x,y) \to (x, y - 9)}[/tex] and then a 180 degrees clockwise rotation about the origin

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Answer:

HIV (human immunodeficiency virus) is a virus that attacks the body’s immune system. If HIV is not treated, it can lead to AIDS (acquired immunodeficiency syndrome). Learning the basics about HIV can keep you healthy and prevent HIV transmission. You can also download materials to share or watch videos on basic information about HIV.

What is HIV?

HIV Overview

HIV (human immunodeficiency virus) is a virus that attacks the body’s immune system. If HIV is not treated, it can lead to AIDS (acquired immunodeficiency syndrome).

There is currently no effective cure. Once people get HIV, they have it for life.

But with proper medical care, HIV can be controlled. People with HIV who get effective HIV treatment can live long, healthy lives and protect their partners.

Where did HIV come from?

History of HIV

HIV infection in humans came from a type of chimpanzee in Central Africa.

The chimpanzee version of the virus (called simian immunodeficiency virus, or SIV) was probably passed to humans when humans hunted these chimpanzees for meat and came in contact with their infected blood.

Studies show that HIV may have jumped from chimpanzees to humans as far back as the late 1800s.

Over decades, HIV slowly spread across Africa and later into other parts of the world. We know that the virus has existed in the United States since at least the mid to late 1970s.

To learn more about the history of HIV in the United States and CDC’s response to the epidemic, see CDC’s HIV and AIDS Timeline.

Step-by-step explanation:

Answer:

The answer is b and r=5x+7 is  35x

Step-by-step explanation:

Answer:

74 is the answer bruhh

Step-by-step explanation:

180 - 106 = 74

Answer:

h =  1.74

t =  1.19

Step-by-step explanation:

15.4t + 11.6h = 38.51

10.2t + 7.3h = 24.84

15.4•t + 11.6•h = 38.51

10.2•t + 7.3•h = 24.84

11.6h+15.4t = 38.51

7.3h+10.2t = 24.84

h = 87

50

= 1.74

t = 119

100

= 1.19

Answer:

If two angles are equal, then they are congruent.

Step-by-step explanation:

Answer:

The  price is   x =  $2.779

Step-by-step explanation:

From the question we are told that

  The  revenue is  [tex]y = - 20x^2 - 50 x + 200[/tex]

   The cost of production is  [tex]y = 30 x - 10[/tex]

Generally at break even point the cost of production is equal to the  revenue

So

      [tex]-20x^2 -50x + 200 = 30x-10[/tex]

=>   [tex]20x^2 +20 -210 = 0[/tex]

Using the quadratic formula to solve this equation we have that

       x =  $2.779

Answer:

1.81 per widget

Step-by-step explanation:

If you put in the equations in Desmos, you can see where is breaks even

Answer:

2.3 hours

Step-by-step explanation:

161 divided by 70 = 2.3

if Carlos drives 161 kilometers at a speed of 70 kilometers per hour then it takes 2.3 hours to drive.

Speed is the time rate at which an object is moving along a path,

Given,

Carlos drives 161 kilometers at a speed of 70 kilometers per hour

From the given data distance=161 kilometers

Distance is one hundred sixty one kilometers

Speed=70km/hr.

Speed is seventy kilometer per hour.

Speed=Distance/time

70=161/time

Now cross multiply

time=161/70

Time=2.3hrs

Hence, if Carlos drives 161 kilometers at a speed of 70 kilometers per hour then it takes 2.3 hours to drive.

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Answer:

?, the value does not exist because you can't square root a negative value.

Step-by-step explanation:

root 8 can be simplified but in this case, its negative so answer D.N.E.

= 3 x √-8

= D.N.E.

Answer:-2

-2 times -2 times -2 = -8