[tex] \frac{x^{3} }{x^{2} + 2x + 1 } [/tex]
How do I divide a monomial by a polynomial? ​

Answers

Answer 1

[tex]x^3=\boxed{x}\cdot x^2[/tex], and

[tex]\boxed{x}(x^2+2x+1)=x^3+2x^2+x[/tex]

Subtract this from [tex]x^3[/tex] to get a remainder of

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

[tex]-2x^2=\boxed{-2}\cdot x^2[/tex], and

[tex]\boxed{-2}(x^2+2x+1)=-2x^2-4x-2[/tex]

Subtract this from the previous remainder to get a new remainder of

[tex](-2x^2-x)-(-2x^2-4x-2)=3x+2[/tex]

[tex]3x[/tex] does not divide [tex]x^2[/tex], so we stop here.

What we've done is to write

[tex]\dfrac{x^3}{x^2+2x+1}=x-\dfrac{2x^2+x}{x^2+2x+1}[/tex]

then

[tex]\dfrac{x^3}{x^2+2x+1}=x-2+\dfrac{3x+2}{x^2+2x+1}[/tex]

and we stop here because the remainder term [tex](3x+2)[/tex] has a degree less than the degree of the denominator.

Alternatively, we can be a bit tricky and notice that

[tex]x^2+2x+1=(x+1)^2[/tex]

Now,

[tex](x+1)^3=x^3+3x^2+3x+1[/tex]

so that

[tex]\dfrac{x^3}{(x+1)^2}=\dfrac{(x+1)^3-(3x^2+3x+1)}{(x+1)^2}[/tex]

We can divide the first term by [tex](x+1)^2[/tex] easily to get

[tex]\dfrac{x^3}{(x+1)^2}=x+1-\dfrac{3x^2+3x+1}{(x+1)^2}[/tex]

Next,

[tex](x+1)^2=x^2+2x+1[/tex]

so that

[tex]\dfrac{x^3}{(x+1)^2}=x+1-\dfrac{3((x+1)^2-(2x+1))}{(x+1)^2}-\dfrac{3x+1}{(x+1)^2}[/tex]

[tex]\dfrac{x^3}{(x+1)^2}=x+1-3+\dfrac{6x+3}{(x+1)^2}-\dfrac{3x+1}{(x+1)^2}[/tex]

[tex]\dfrac{x^3}{(x+1)^2}=x-2+\dfrac{3x+2}{(x+1)^2}[/tex]

which is the same result as before.


Related Questions

PLEASE HELP ME ASAP!!! ILL MARK BRIANLIEST AND GIVE EXTRA POINTS1. When writing a linear equation for a word problem, what are some things to keep in mind or some keywords to watch out for? What do those keywords mean/ why should you watch out for those things?

Answers

Answer:

Some keywords include "starting amount," you should look out for this because it will be the y-intercept for the equation. Another keyword may be "daily" or "monthly" or "yearly," which would be the coefficient of x, or the amount that y increases with an increase of 1 in x.

pls mark brainliest :)

Perpendicular to y = 6x + 2; passing through the point (3,5).

Answers

Answer:

Step-by-step explanation:

y = 6x + 2

Slope = 6

A line perpendicular to this would have a negative reciprocal slope = [tex]-\frac{1}{6}[/tex]

To solve for the y-intercept, plug the coordinates given into the question.

y = mx + b

5 =[tex]-\frac{1}{6}[/tex] (3) + b

5 = [tex]-\frac{3}{6}[/tex] + b

5 = [tex]-\frac{1}{2}[/tex] + b

b = 5 + [tex]\frac{1}{2}[/tex]

b = [tex]\frac{11}{2}[/tex] or 5 [tex]\frac{1}{2}[/tex]

So, your new slope-intercept line equation is

y = [tex]-\frac{1}{6}[/tex]x + 5 [tex]\frac{1}{2}[/tex]

I would really appreciate it if you would please mark me brainliest!

Have a blessed day!

A set of 9 numbers has a mean of 20. What additional number must be included in this set to create a new set with a mean that is 4 less than the mean of the original set?

Answers

Greetings from Brasil...

The average for a set of 9 elements will be

(A + B + C + D + E + F + G + H + I) ÷ 9 = 20

Let's make (A + B + C + D + E + F + G + H + I) like S

(I chose S to remember a sum)

Let us think.....

S ÷ 9 = 20

S = 20 × 9

S = 180

So,  (A + B + C + D + E + F + G + H + I) = 180

According to the statement, we will include a number (element J) in the sum to obtain a mean of (20 - 4), that is:

(A + B + C + D + E + F + G + H + I + J) ÷ 10 = (20 - 4)

as seen above, (A + B + C + D + E + F + G + H + I) = 180, then

(180 + J) ÷ 10 = 16

(180 + J) = 160

J = 160 - 180

J = - 20

So, including the number - 20 (minus 20) in the original mean we will obtain a new mean whose result will be 16

If y varies inversely as x, and y = 6 when x = 24, find x when y = 18

Answers

Answer:

x = 8

Step-by-step explanation:

Standard form for inverse variation:

y = k/x

We now use the given information to find k.

y = 6 when x = 24

6 = k/24

k = 6 * 24

k = 144

The equation for this inverse relation is

y = 144/x

For y = 18, we get

18 = 144/x

18x = 144

x = 144/18

x = 8

Answer:

x = 8

Step-by-step explanation:

To find the value of x when y = 18 we must first find the relationship between them.

The statement

y varies inversely as x is written as

[tex]y \: \: \alpha \: \: \frac{k}{x} [/tex]

where k is the constant of proportionality

From the question when

y = 6

x = 24

Substitute the values into the above equation

That's

[tex]6 = \frac{k}{24} [/tex]

Cross multiply

That's

k = 24(6)

k = 144

So the formula for the variation is

[tex]y = \frac{144}{x} [/tex]

When

y = 18

[tex]18 = \frac{144}{x} [/tex]

Cross multiply

18x = 144

Divide both sides by 18

x = 8

Hope this helps you

Simplify: 7 - 3(2x - 5) - 4x

Answers

Answer:

[tex]\Huge \boxed{2(-5x+11)}[/tex]

Step-by-step explanation:

[tex]7 - 3(2x - 5) - 4x[/tex]

Expanding brackets.

[tex]7-6x+15-4x[/tex]

Grouping like terms.

[tex](-6x-4x)+(7+15)[/tex]

Combining like terms.

[tex]-10x + 22[/tex]

Factoring the expression.

[tex]2(-5x+11)[/tex]

Please solve, 7(2-2x)= -13-5x​

Answers

Answer:

[tex]x=3[/tex]

Step-by-step explanation:

We can try and isolate x on one side of the equation to find its value.

First let's apply the distributive property on the left side and get a simpler equation.

[tex]7(2-2x)=-13-5x\\\\14-14x = -13-5x[/tex]

Now, to simplify this down, we can add 5x to both sides.

[tex]14-14x + 5x = -13-5x + 5x\\\\14-9x=-13[/tex]

Now we can add 13 to both sides:

[tex]14-9x+13=-13+13\\\\27-9x=0[/tex]

Now we subtract 27 from both sides:

[tex]27-9x-27=0-27\\\\-9x=-27[/tex]

And finally we divide both sides by -9.

[tex]-9x\div-9=-27\div-9\\\\x=3[/tex]

Hope this helped!

Answer:

[tex]\Huge \boxed{x=3}[/tex]

Step-by-step explanation:

[tex]7(2-2x)= -13-5x[/tex]

Expanding brackets.

[tex]14-14x= -13-5x[/tex]

Adding 5x and -14 to both sides.

[tex]-14x+5x=-13-14[/tex]

[tex]-9x=-27[/tex]

Dividing both sides by -9.

[tex]x=3[/tex]

Solve. 10. On weekdays, Kiki walks 2 miles in the morning and I mile in the evening. On Saturdays, she walks 4 miles. Place parentheses in the expression to represent the number of miles Kiki walks each week. 5x 2 + 1 + 4 USING GROUPING SYMBOLS (C)​

Answers

Answer:

The parenthesis should be placed as shown:

5 x (2+1) + 4

Step-by-step explanation:

What Kiki walks every week day is : 2 miles + 1 mile = (2+1)

since this is done 5 times per week (on weekdays) to obtain the total walked on weekdays, you multiply this by 5: 5 x (2+1)

and we need to add to this what Kiki walks on Saturdays (4 miles){

5 x (2+1) + 4

A bike rental company charges a $10 fee
plus $5 per hour. Sofia has $25 to spend.
Which inequality could you use to find x,
the number of hours Sofia could rent a
bike?

Answers

Answer:

10 + 5x ≤ 25

Step-by-step explanation:

7 > x/4, solve for x, simplify

Answers

Answer:

28 > x

Step-by-step explanation:

Step 1: Solve the inequality

[tex]7 > \frac{x}{4}\\28 > x[/tex]

Therefore x is any value smaller than 28

Answer:

[tex]\huge\boxed{x<28}[/tex]

Step-by-step explanation:

[tex]7 > \frac{x}{4}\\\\7*4>\frac{x}{4}*\frac{4}{x}\\\\28>x\\\\\boxed{x<28}[/tex]

How many dots are there at t minutes? Solve the problems by your preferred method. Your
solution should indicate how many dots will be in the pattern at 3 minutes, 100 minutes,
and t minutes. Be sure to show how your solution relates to the picture and how you
arrived at your solution.



Answers

Answer:

The image to the question is missing, but I found a matching image, which is attached to this solution

Answer:

3 minutes = 13 dots

100 minutes = 401 dots

t minutes = 4(t) + 1 dots

Step-by-step explanation:

From the image, the following can be noticed:

time (Mins)       dots

0                          1

1                           5

2                          9

The pattern gotten from this progression is that, if the time is multiplied by 4, and the result added to one, the result will be the number of dots.

hence, when the time is 0 minutes:

0 × 4 = 0

0 + 1 = 1 ( 1 dot)

when the time is 1 minute

1 × 4 = 4

4 + 1 = 5 (5 dots)

when the time is 2 minutes

2 × 4 = 8

8 + 1 = 9 ( 9 dots)

Therefore,

when the time = 3 minutes

3 × 4 = 12

12 + 1 = 13 dots

at 100 minutes:

100 × 4 = 400

400 + 1 = 401 dots

at t miutes

t × 4 = 4t

4t + 1 = number of dots

Therefore number of dots at t minutes = 4(t) + 1

what is 3x + 4 = 12​

Answers

Answer:

3x - 4 = 12

3x = 12 + 4

3x = 16 (divide both sides by 3 to get x)

3x/3 = 16/3

x = 5.333.......

Point M is the midpoint between points A and B. If A(-7, 2) and B(-1,-4)
find the location of M.

Answers

Answer:

  M(-4, -1)

Step-by-step explanation:

M = (A +B)/2

M = ((-7, 2) +(-1, -4))/2 = (-8, -2)/2 = (-4, -1)

The location of M is (-4, -1).

f(x)= (1,2) (3, -4) (-5, -8)​

Answers

Answer: y= 156

Step-by-step explanation:

y= 12(3-4) (-5 -8)

x+5=5+x is an example of what property?

Answers

Answer: Commutative Property

Step-by-step explanation: In Picture.

Simplity (a+(-a) ) + b​

Answers

Answer:

Hey there!

(a+(-a))+b

a-a+b

b

Let me know if this helps :)

Answer:

b // (a-a)+b

Step-by-step explanation:

(a+(-a)) +b

(a-a)+b

b

Approximate the square root of 228 to the nearest hundredth.

Answers

Answer:

15.1

Step-by-step explanation:

15.1 times 15.1 = 228.01

Answer:

Nearest hundredth of 228 is 200 so the square root of 200 is 10under root 2.

Step-by-step explanation:

Hope it will help you :)

When drawing the arcs in order to bisect a line segment, why must the width of the compass be more than half of the length of
the segment? (1 point)
of the compass is not opened that wide, the arcs will not intersect, making the subsequent steps impossible
This is simply a loose guideline and the actual width of the compass does not matter
If the compass is opened wider than that, for example just less than the full length of the line segment, the arcs will not intersect
making the subsequent steps ingyssible
Bisecting means to divide something evenly in half, so the compass should be a little bit wider than half the length of the line segment
but not wider than three-fourths of the length of line segment

Answers

Answer: Choice A

If the compass isn't open wide enough, then the arcs won't intersect forming the points we need to create the perpendicular bisector.

Check out this link to see my response to the identical question answered 2 days ago

https://brainly.com/question/17191122

feel free to ask any questions you have if you're still stuck

Answer:

a

Step-by-step explanation:

Caren held 260 of the shares for herself and sold the rest in equal amounts to six investors. How many shares does each investor own? If the business fails and leaves $65,000 in debt, for how much would each investor be liable

Answers

Answer:

40 shares each and $3,000 each

Step-by-step explanation:

The computation is shown below:

For the number of shares

Since there are total of 500 shares out of which 260 shares are held by Caren so the remaining shares left is

= 500 shares - 260 shares

= 240 shares

And, there are 6 investors

So the number of shares owned by each investor is

[tex]= \frac{240}{6}[/tex]

= 40 shares

Now the value of the shares held by each inventory is

[tex]= 40 shares \times \$75[/tex]

= $3,000

Total debt is $65,000

So, the liability per share is

[tex]= \frac{\$65,000}{500}[/tex]

= $130

And each investor holds 40 shares

So, each investor is liable for

[tex]= \$130 \times 40\ shares[/tex]

= $5,200

As we can see that the value of the shares is less than the amount liable by each investor

So each investor is liable for $3,000

And, the liability of Caren is

[tex]= 260\ shares \times \$75[/tex]

= $19,500

Round the number below to the nearest tenth. x = 5.03126

Answers

Answer:

See Below:

Step-by-step explanation:

Tenths place is just 1 decimal place thus it is 5.0

Consider the system of quadratic equations \begin{align*} y &=3x^2 - 5x, \\ y &= 2x^2 - x - c, \end{align*}where $c$ is a real number. (a) For what value(s) of $c$ will the system have exactly one solution $(x,y)?$ (b) For what value(s) of $c$ will the system have more than one real solution? (c) For what value(s) of $c$ will the system have no real solutions? Solutions to the quadratics are $(x,y)$ pairs. Your answers will be in terms of $c,$ but make sure you address both $x$ and $y$ for each part.

Answers

Hello, we need to solve this system, c being a real number.

[tex]\begin{cases}y &= 3x^2-5x\\y &= 2x^2-x-c\end{cases}[/tex]

y=y, right? So, it comes.

[tex]3x^2-5x=2x^2-x-c\\\\3x^2-2x^2-5x+x+c=0\\\\\boxed{x^2-4x+c=0}[/tex]

We can compute the discriminant.

[tex]\Delta=b^2-4ac=4^2-4c=4(4-c)[/tex]

If the discriminant is 0, there is 1 solution.

It means for [tex]4(4-c)=0 <=> 4-c=0 <=> \boxed{c=4}[/tex]

And the solution is

[tex]x_2=x_1=\dfrac{4}{2}=2[/tex]

If the discriminant is > 0, there are 2 real solutions.

It means 4(4-c) > 0 <=> 4-c > 0 <=> [tex]\boxed{c<4}[/tex]

And the solution are

[tex]x_1=\dfrac{4-\sqrt{4(4-c)}}{2}=\dfrac{4-2\sqrt{4-c}}{2}=2-\sqrt{4-c}\\\\x_2=2+\sqrt{4-c}[/tex]

If the discriminant is < 0, there are no real solutions.

It means 4(4-c) < 0 <=> 4-c < 0 <=> [tex]\boxed{c>4}[/tex]

There are no real solutions and the complex solutions are

[tex]x_1=\dfrac{4-\sqrt{4(4-c)}}{2}=\dfrac{4-2\sqrt{i^2(c-4)}}{2}=2-\sqrt{c-4}\cdot i\\\\x_2=2+\sqrt{c-4}\cdot i[/tex]

Thank you.


2 which of the following is a perfect cube
a) 400 -
D. 3375–
C 8000 -

Answers

Answer:

8000 is a perfect cube but 3375 can be also but i m a little sure that 8000 is a perfect cube

There are a total of 84 people, lions, and giraffes at the zoo. Cassie visits the
zoo and counts 282 total legs. If you were to double the number of people,
that is equivalent to tripling the number of lions. How many of each are at the
zoo?

Answers

Answer:

14 giraffes, 28 people and 42 lions

Step-by-step explanation:

you add how many legs for all 3 x1

add this you have a total 14

double that is 28 triple that is 42

total 84

Solve log x = 4.
Ox=4
O x = 40
Ox= 1,000
Ox= 10,000

Answers

Hi there! :)

Answer:

[tex]\huge\boxed{x = 10,000}[/tex]

Given:

[tex]logx = 4[/tex]

The given expression is a logarithm with a base of 10, therefore we can rewrite this as:

[tex]10^{4} = x[/tex]

Evaluate:

[tex]x = 10,000[/tex]

describe a situation that could be modeled with the ration 4:1​

Answers

Answer:

There could be many situations that use this ratio, but one example could be For every 4 pencils purchased 1 large eraser will be purchased.

But, as said before anything can be used as an example.

Find The area of each square. Input each area then click them

Answers

Answer:

see below

Step-by-step explanation:

Area 1 = 3 x 3 = 9 m²

Area 2 = 4 x 4 = 16 m²

Area 3 = 5 x 5 = 25 m²

The areas are 16 unit², 9 unit² and 25 unit² respectively.

What is Surface Area?

The area is the area occupied by a two-dimensional flat surface. It has a square unit of measurement. Square units are used to measure it as well.

As per the given diagram:

We are given 3 squares, and we have to find out the area of each square.

The area of a square is given by a², where a is the length of the side of the square.

For area of the square with length of the side, 4 units.

A = (4)² unit² = 16 unit²

For area of the square with length of the side, 3 units.

A = (3)² unit² = 9 unit²

For area of the square with length of the side, 5 units.

A = (5)² unit² = 25 unit²

The areas are 16 unit², 9 unit² and 25 unit² respectively.

Hence, The areas are 16 unit², 9 unit² and 25 unit² respectively.

To learn more about surface area, click:

brainly.com/question/29298005

#SPJ3

Identify each polynomial as either a monomial binomial or trinomial. Then state the degree and leading coefficient.

1) 4x^5 + 2
Name?
Degree?
Leading Coefficient?

2) - 4x + 7x^3-11
Name?
Degree?
Leading Coefficient?

3) 18x^5y^3z
Name?
Degree?
Leading Coefficient?​

Answers

Answer with explanation:

Monomial  = Polynomial with one term. Binomial   = Polynomial with two terms.Trinomial   = Polynomial with  three terms.Degree - highest power of variableLeading coefficient - Coefficient of the variable or variables with highest power.

[tex]1)\ \ 4x^5 + 2[/tex]

Name = Binomial   (as it has two terms)

Degree= 5     (power of x)

Leading Coefficient = 4   (coefficient of [tex]x^5[/tex])

[tex]2)\ \ - 4x + 7x^3-11[/tex]

Name = trinomial  (as it has 3 terms)

Degree = 3   (highest power of x)

Leading Coefficien= 7    ( coefficient of  [tex]x^3[/tex])

[tex]3)\ \ 18x^5y^3z[/tex]

Name= Monomial  (as it has 1 term)

Degree= 5+3+1= 9    [Addition of power of all variables]

Leading Coefficient = 18

10 = 7 - m*
It says solve & check solution. Can someone help asap

Answers

Answer:

see explanation

Step-by-step explanation:

Given

10 = 7 - m ( subtract 3 from both sides )

3 = - m ( multiply both sides by - 1 )

- 3 = m , or

m = - 3

As a check

Substitute m = - 3 into the right side of the equation and if equal to the left side then it is the solution

7 - m = 7 - (- 3) = 7 + 3 = 10 = left side

Thus m = - 3 is the solution to the equation

Suppose the test scores of students in a class are normally distributed with a mean of 86 and a standard deviation of 4. What is the z-score for a student that scored 76 on a test? A.−4 .−2.5 C.2.5 D.4

Answers

Answer:

-2.5

Step-by-step explanation:

Here in this question, we are interested in calculating the z-score for a student that had a particular mark at the test

To calculate the z-score, we need to use a mathematical formula

Mathematically;

z-score = (x - mean)/SD

From the question;

x = 76

mean = 86

standard deviation SD = 4

Plugging these values in the equation, we have;

z-score = (76-86)/4 = -10/4 = -2.5

In a dessert, the ratio of the number of ounces of dark chocolate used to the number of ounces of white chocolate used is 8 : 5 How many ounces of dark chocolate are used for every 1 ounce of white chocolate used to make the dessert ?

Answers

Answer:

1.6 ounces

Step-by-step explanation:

Divide the ratio by 5 to get the number of ounces of dark chocolate used for 1 ounce of white chocolate, since 5/5 = 1

8/5 = 1.6

5/5 = 1

The new ratio is 1.6 : 1

This means that 1.6 ounces of dark chocolate are used for every 1 ounce of white chocolate

Brendan's dog has a mass of 25,700 grams. What is the dog's mass in milligrams? Show your work.

Answers

Answer:

25700000

Step-by-step explanation:

1,000 miligrams in a gram so 25700*1000 = 25700000

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And looking across space with instruments, and intelligences such as we have scarcely dreamed of, they see, at its nearest distance only 35,000,000 of miles sunward of them, a morning star of hope, our own warmer planet, green with vegetation and grey with water, with a cloudy atmosphere eloquent of fertility, with glimpses through its drifting cloud wisps of broad stretches of populous country and narrow, navy-crowded seas. And we men, the creatures who inhabit this earth, must be to them at least as alien and lowly as are the monkeys and lemurs to us. The intellectual side of man already admits that life is an incessant struggle for existence, and it would seem that this too is the belief of the minds upon Mars. Their world is far gone in its cooling and this world is still crowded with life, but crowded only with what they regard as inferior animals. To carry warfare sunward is, indeed, their only escape from the destruction that, generation after generation, creeps upon them. In three to five complete sentences, describe the environment on Mars. Use information from the text to support your answer. Blazer Sports Store is preparing to pay its quarterly dividend of $7.75 a share this quarter. The stock closed at $105.64 a share today. What will the ex-dividend stock price be if the relevant tax rate is 19 percent and all else is held constant The divine right of kings ended in England during the how does brainstorm,decide,work,enjoy help with motivation? Whats an algebraic expression for 8 increased by three times a number Assume the random variable X is normally distributed with mean and standard deviation . Compute the probability. Be sure to draw a normal curve with the area corresponding to the probability shaded. P(X) Will mark the brainliest Please answer this im desperate :((( Which person is an example of an entrepreneur?A. A musician who writes popular songsB. A chef who opens a new restaurantC. A truck driver who gets a pay raiseD. A doctor who completes medical training PLZZZZZZZZ HELP ME I WILL GIVE BRAINLIEST TO THE FASTEST AND MOST ACCURATE find the measure of angle N in the parallelogram. Round your answer to the nearest degree Convert 2 3/8 to a decimal I need to know this answer can you help ? Fast-forwardingtomoderntimes,theheydayofthehuman-poweredflightisfarfromover.Lucrativeprizesstillaboundforrotor-drivencraft,whilstexperimentalversionsofhelicoptersandornithopters(flyingmachineswithflapping,bird-likewings)arebothonthedrawingboardandleapingoffitwithgreatabandon.Thedreamofhuman-poweredflighthasbeenanofficialrealitynowformorethan50years,butthelimitsoftheiringenuityareboundlessespeciallywheninventorsandengineersarespurredonbyprizesaslargeasthe$250,000onofferfromtheAmericanHelicopterSocietysIgorSikorskyPrizeFund.Andwhoknows,perhapsonedayhiscommutetoworkwilltakeplacenotonabicyclebutonabicycle-poweredcraft.Doesyourofficehavealandingpadontherooforarunwaynearby?Thedaywhenshedoesmightjustbecloserthantheythink! Higher Order Thinking Describe thetransformation g of f(x) = |x| as a stretch andas a compression. Then write two equationsto represent the function. What can youconclude? Explain. In the same science fair, Tina asks the question "Does caffeine increase the heart rate of an earthworm?" In Test 1, she measures the heart rate by looking at the earthworm under a microscope, the earthworm has a heart rate of 50 bpm (beats per minute). In Test 2, she places a few drops of caffeine on the earthworm's skin and measures the rate again. In this test, the heart rate is 68 bpm. 6) What is the Independent/Manipulated variable? 7) What is the Dependent/Responding variable? 8) Tina's experiment should have included a hypothesis. In a complete sentence, suggest a hypothesis for Tina's experiment. You may use an if/then statement. Determine three consecutive odd integers if the square of the largest integer is 33 less than the sum of the squares of the two smaller integers. Which of the following is NOT true of natural selection? a) It requires genetic variation b) It results in descent with modification c) It always results in the strongest individuals d) It involves differential reproductive success e) It involves genetic variation and differential reproductive success