Mathematics High School

j’ai besoin d’aide pour cet exercice

Answers

Answer 1

Answer:

Step-by-step explanation:

A(x) = 4x³ - 4x²- 23x + 20

B(x) = 2x² + 3x - 4

C(x) = 2x - 5

a). A(x) + B(x) + C(x) = (4x³ - 4x²- 23x + 20) + (2x² + 3x - 4) + (2x - 5)

= 4x³ + (-4x² + 2x²) + (-23x + 3x + 2x) + (20 - 4 - 5)

= 4x³- 2x²- 18x + 11

b). A(x) - 2B(x) + 2C(x) = (4x³ - 4x²- 23x + 20) - 3(2x² + 3x - 4) + 2(2x - 5)

= 4x³ - 4x² - 23x + 20 - 6x² - 9x + 12 + 4x - 10

= 4x³ - 10x²- 28x + 22

c). A(x) . B(x) = (4x³ - 4x² - 23x + 20)(2x² + 3x - 4)

= 2x²(4x³ - 4x² - 23x + 20) + 3x(4x³ - 4x² - 23x + 20) - 4(4x³ - 4x² - 23x + 20)

= 8x⁵ - 8x⁴- 46x³ + 40x² + 12x⁴- 12x³ - 69x² + 60x - 16x³+ 16x²+ 92x - 80

= 8x⁵+ 4x⁴- 74x³- 13x²+ 152x - 80

d). [B(x)]² = (2x² + 3x - 4)²

= 2x²(2x² + 3x - 4) + 3x(2x² + 3x - 4) - 4(2x² + 3x - 4)

= 4x⁴ + 6x³ - 8x² + 6x³ + 9x² - 12x - 8x² - 12x + 16

= 4x⁴ + 12x³- 7x²- 24x + 16

Related Questions

7.

Find the range of f(x) = –2x – 5 for the domain {–2, –1, 1, 2}.

A. {–1, –3, 7, 9}

B. {1, 3, 5, 7}

C. {–1, –3, –7, –9}

D. {–1, –3, 3, 5}

Answers

Answer: C) [-1,-3,-7,-19]

Step-by-step explanation:

Range = {-2(-2) - 5, -2(-1) - 5, -2(1) - 5, -2(2) - 5} = {4 - 5, 2 - 5, -2 - 5, -4 - 5} = (-1, -3, -7, -9}

Answer:

-2(-2)-5= -1 -2(-1)-5=-3 -2(1)-5=-7 -2(2)-5=-9... A. {-1, -3, 7, 9}

Step-by-step explanation:

By substituting each value of the domain of x in the function and solving it we will get the range of the function for respective domain

The given function is :

f(x) = -2x - 5

For x = -2 , f(x) is:

f(-2) = (-2*-2) - 5 = 4 - 5 = -1

For x = -1, f(x) is :

f(-1) = (-2*-1) - 5 = 2 - 5 = -3

For x = 1 , f(x) is

f(1) = (-2*1) - 5 = -2 -5 = -7

For x = 2, f(x) is

f(2) = (-2*2) - 5 = -4 -5 = -9

The range is -1 , -3 , -7 , -9

Hope this helps ..!!

Thank you :)

Hello Miss!! I hope you are doing well.Ms.Sawsan are my answers correct here or is there something I need to change?

Answers

hi i think you posted this on the wrong platform

Helllppppppppppp pllzlzlzllzlz check the picc

Answers

Answer:

[tex]Rx=1(p) = (4,7)[/tex]

Step-by-step explanation:

he given point P has coordinates, [tex](-2,7)[/tex] We want to find the image of this point, after a reflection in the line [tex]x=1[/tex]

simplify this please (45)(26)

Answers

Answer:

1170

Step-by-step explanation:

45 times 26

Answer:

1170

45x26=1170

In which table is y a linear function of x?
X
0
1
4
5
A
8
y
0
5
96
-9
-12
X
0
1
2.
3
4
B В
y
0
7
12
15
16
x
1
0
1
M
©
у
6
8
10
12
14
х
1
1
N
3
4
5
D
32
16
у
4
8
2.

Answers

Answer:

ur answer should be C. But I'm not really sure..

The table in which y is a linear function of x is; Choice C

Linear functions

According to the question;

We are required to identify in what table y is a linear function of x.

The slope of a linear function is always constant.

Hence, By observing the table in Choice C;

Slope = (8-6)/(0-(-1)) = (10-8)/(1-0) = 2.

Hence, since slope of the function is constant, the required table is: Choice C.

Answers

Answer:

3/4

Step-by-step explanation:

Gradient=6/8=3/4

Explanation: you have to find 2 points that fit on the coordinate plane as whole number (0,1) and (4,4) could work. Next you do y² - y over x² - x. Which would make the slope 3/4.

Answer: 3/4

help for my assighnment thanks

Answers

Answer:

Step-by-step explanation:

Answer:

B and D

Step-by-step explanation:

Just trust me

Help!
Which functions graph is shown below?

Answers

Answer:

Sin x so A

Step-by-step explanation:

Please give me brainliest pls. Im begging you I helped.

In systems by substitution what is y=x+8 and x+y=2

Answers

Answer:

x = -3

Step-by-step explanation:

y = x + 8 and x + y = 2

Using substitution, we know that y = x + 8, so:

x + y = 2

x + (x + 8) = 2

2x + 8 = 2

2x = -6

x = -3

Then we solve for y:

x + y = 2

-3 + y = 2

y = 2 + 3

y = 5

Which of the following shapes is a convex nonagon?
OA)
OB)
OC)
OD)

Answers

Shape A is a convex nonagon

It is asking for a convex nonagon, not a convex polygon. So in this case we are looking for a shape with 9 straight lines and 9 angles. Which means we can cross A out.

Now we need to look at which nonagon is a convex nonagon which means that we are looking for the shape having only interior angles measuring less than 180°. So this means that B and D can be crossed out.

Thus, the answer is C.

P.S. If you find my answer helpful, please mark me brainiest!

Does anyone know this question!??

Answers

Answer:

£213110.48

Step-by-step explanation:

Principal= 200000

Rate = 1.6%

Time = 4 yrs

Amount

= P(1+1.6/100)⁴

=200000(101.6/100)⁴

= 213110.489

= £213110.48

Miss Van invested some money by using the app e-trade. She tracks her

gains and losses using the app on her phone. Miss Van receives a daily

notification that updates her on all her transactions from the previous day.

This morning, her notification read as follows: Yesterday's investment

activity included a loss of $500, a gain of $740, and another gain of $120.

Log in now to see your current balance. Write an integer to represent the

highlighted box.

Answers

Answer:

$360

Step-by-step explanation:

Gains represents additions to her account while losses represent substractions

-$500

+740

+120 ________

$360

Which of the following shows the correct steps to find the value of
1
? (1 point)
83
O
83 = (43)3 = (4)
= 4
()() -
088=(23) =(2,394 = 2
O &$=(20) = (2+3)=
2+
= 16
О
164 = (82)4 = (8)
= 8

Answers

9514 1404 393

Answer:

b, d

Step-by-step explanation:

When you're taking the cube root, the thing you're taking the cube root of is best expressed as a cube.

You know that 2^3 = 8 and 3^3 = 27, so any other representation of 8 or 27 is irrelevant to the problem.

The appropriate choices are the second and fourth ones (B, and D).

Peter scored 27 out of 50 in a test. What percent was that? *
-13.5%
-27%
-50%
-54%

Answers

Answer:

54% for sure please give me brainliest

Answer:

54%

Step-by-step explanation:

27/50 = 54/100 (multiply the full score untill it is at 100, the use the same number it took for that and multiply the points)

3. Find the height of rectangle with area (2x^2-9x+9) ft^2 and width (2x-3) ft

Answers

Answer:

The height of the area is (x - 3) ft.

Step-by-step explanation:

You can do this a few ways. You could use long division to divide the area by the width, or you could just factor the area, which is guaranteed to have the width as a factor, leaving you with the height.

Let's go with factoring, as that's probably what this question is intended as:

[tex]= \frac{2x^2 - 9x + 9}{2x - 3} \\\\= \frac{2x^2 - 6x - 3x + 9}{2x - 3} \\\\= \frac{2x(x - 3) - 3(x - 3)}{2x - 3} \\\\= \frac{(2x - 3)(x - 3)}{2x - 3} \\\\= x - 3[/tex]

urgent solve 5( x- 2 )=35

Answers

5 ( x - 2 ) = 35
5x - 10 = 35
+10 +10
5x = 45
5x/5 = 45/5
x = 9

Step-by-step explanation:

5x-10=35

5x=35+10

5x=45

5x/5=45/5

x=9

Sam and Adam share some money in the ratio 2 : 5.
Adam got £12 more than Sam.
Work out how much money Sam received.

Answers

Answer:

£8

Step-by-step explanation:

Sam:Adam

2:5

3=£12

12÷3=4

1=4

4×2=8

sam=£8

Is the product of greater or less than ? Is it
easier to compare the product to using the number
line or area model? Explain.
5
8

Answers

Answer:

3/5 x 5/8 is less 5/8

Step-by-step explanation:

3/5 x 5/8 = 15/40

Simply

15/40 = 3/8

•

5/8 > 3/8

ANSWER THIS PLZZZZZZ

Answers

Answer:

dude all you have to do is add it up its A or B

Answer:

Step-by-step explanation:

Jose brought 9 pounds of rice for $4. How many pounds of rice did he get per dollar?

Answers

Answer:

1.5 pound ever dollar

Step-by-step explanation:

just calculate

Answer:

2.25 answer

Step-by-step explanation:

9÷4=2.25answer thanks

Very urgent. Please help

Answers

It would be (3) because the measure of angle B is simply 180 degrees minus the measure of angle ACD

Answer:

(2) 68°

Step-by-step explanation:

Since the required m angle B = 68°

What is x?
-4x-2 /3=(-6)

Answers

Answer:

4/3

Step-by-step explanation:

Answer:

x= 4

Step-by-step explanation:

-4x-2 /3=(-6)

-4x-2= 3 (-6)

-4x-2=-18

-4x=-18+2

-4x=-16

x=-16/-4 = 16/4 = 4

HELP ILL MARK YOU BRAINLIST

Answers

the y-intercept is -1 because that’s where the line crosses on the y-axis

what is the proportion of 3 over 7 =n over 28

Answers

n=12. To get 28, you multiply 7 by 4. So you do the same thing to 3 and get 12 :)

A marble is selected from a bag containing eight marbles numbered 1 to 8.
The number on the marble selected will be recorded as the outcome.
Consider the following events.
Event A: The marble selected has an odd number.
Event B: The marble selected has a number from 3 to 6.
Give the outcomes for each of the following events.
If there is more than one element in the set, separate them with commas.
(a) Event "A and B":
mm
(b) Event "A or B".
X
?
(C) The complement of the event B: {I}

Answers

Answer:

here you go

Step-by-step explanation:

plz answer. Its urgent. thanks

Answers

Answer:

[tex] a = \dfrac{5}{18} [/tex]

[tex]b = -\dfrac{1}{18}[/tex]

Step-by-step explanation:

You need to rationalize the fraction.

[tex] \dfrac{1}{5 + \sqrt{7}} = a + b\sqrt{7} [/tex]

[tex] \dfrac{1}{5 + \sqrt{7}} \times \dfrac{5 - \sqrt{7}}{5 - \sqrt{7}} = a + b\sqrt{7} [/tex]

[tex] \dfrac{5 - \sqrt{7}}{25 - 7} = a + b\sqrt{7} [/tex]

[tex] \dfrac{5 - \sqrt{7}}{18} = a + b\sqrt{7} [/tex]

[tex] \dfrac{5}{18} - \dfrac{1}{18}\sqrt{7} = a + b\sqrt{7} [/tex]

[tex] a = \dfrac{5}{18} [/tex]

[tex]b = -\dfrac{1}{18}[/tex]

XYZ will be translated so that the coordinates of X are (5,11)

Answers

Answer: B

Step-by-step explanation:

A number plus five is eighteen.

Answers

Answer:

n = 13

Step-by-step explanation:

n + 5 = 18

Answer:

Step-by-step explanation:

To find the number, subtract 5 from 18:

18 - 5

= 13

So, the number is 13.

Very confused on how to get the inside variables

Answers

Yes bsbsjwjwjsbshsueu

- 7r - 3r - 8 = 24.

Answers

Answer:

Step-by-step explanation:

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