Mathematics Middle School

1. Rút gọn biểu thức A(x) = (x+2)(x+3)(x+5) - (x-1)(x+4)(x+7). Từ đó tìm tất cả các giá trị x sao cho A(x) = 0.

Answers

Answer 1

x = -29/7

Step-by-step explanation:

A(x) = (x^2 + 5x + 6)(x + 5) - (x^2 + 3x - 4)(x + 7)

= (x^3 + 10x^2 + 31x + 30) - (x^3 + 10x^2 + 17x - 28) = 14x + 58

A(x) = 0 => 14x + 58 =0 => x = -58/14 = -29/7

Answer 2

Answer:

778744

Step-by-step explanation:

387t98878989890

Related Questions

I need help with these questions from 11 to 20. I already did questions 1 through 10 with my math teacher but I'm not in school so please please please answer all of these answers it would mean a lot to me and would help me a lot with the math homework I need to get done, so yeah. Please help.

Answers

Hope this helps :D

11 is 6 and 3
12 is coefficient
13 is variable
14 is 82b and 3u^2 and 7 and 41h and 54
15 is 9r and 2g
16 is exponent
17 is constant
18 is 21 and 8 and 3
19 is r and g and n
20 is a term
13 answer is
The number and element

Please answer all these questions right I can’t do them ‍♀️
I will mark you as brainliest if you do!

Answers

Step-by-step explanation:

first take out graph paper then line it

sorry i don't have graph copy right now hope it work

Graph the solution of the inequality 2x − (3 − x) > x + 1 on the number line. sorry i don't have a graph but quick pls help'll give brainliest!!!

Answers

Answer:

see below

Step-by-step explanation:

2x − (3 − x) > x + 1

Distribute the minus sign

2x-3+x > x+1

Combine like terms

3x-3 >x+1

Subtract x from each side

3x-3-x>x+1-x

2x-3 >1

Add 3 to each side

2x-3+3>1+3

2x>4

Divide by 2

2x/2 >4/2

x>2

Open circle at 2 , line going to the right

Answer:7

Step-by-step explanation:

Please Help Me! I will give brainly!!


The distance from your front door to the mailbox is 18 4/5 meters. The distance from your front door to your basketball hoop is 13 7/10 meters. How much farther from your front door is the mailbox than the basketball hoop?

Answers

Answer:

5 1/10 meters

Step-by-step explanation:

18 4/5 can be changed to 18 8/10 so

18 8/10 - 13 7/10 = 5 1/10 meters

5 1/10 meters ahhhhhhhhhhhh

Kindly Please Help....
You will need to make make a frequency distribution table and represent it in a bar graph creatively. (5 different forests in India)

Answers

Answer:

1st- thorn forest - forest which have many thorns it is in rajasthan

2nd- evergreen forest - a forest whose trees are green in any season

3rd- Amazon forest - in Amazon forests there are many venomous/ poisonous amphibians and stuff like anacondas and wild animals.

Step-by-step explanation:

so sorry this is all i could find

3:Last year a fishing license cost $52.00. This year the license will cost $27.04. This is a ____ percent decrease.

Answers

Answer:

48% decrease

Step-by-step explanation:

Original cost subtract new cost

52-27.04

24.96

Divide by original cost

24.96 / 52

0.48

Change to percent form

48%

48% decrease

52.69% decrease, This year’s cost divided by last year’s cost times 100

Each floor of a parking garage can hold 90 cars. When all of the floors are full, there are 450 cars in the garage altogether. What fraction of the cars is parked on the ground floor?

Answers

90 cars out of 450

90 / 450 = 1/5

I guess the number of floors is 5

There would be 5 floors

A bag of marbles contains 12 blue marbles, 5 red marbles, and 13 green marbles. if one is selected at random, what is the probability that the selected marble is blue?

A. 0
B. 2/5
C. 13/30
D. 5/6
E. 1

Answers

Answer:

2/5

Step-by-step explanation:

Total marbles=12+13+5=30

P(that the selected marble is blue) = 12/30 = 6/15 = 2/5

I think it’s B sorry if im wrong

Tehira has read 110 pages of a 290-page book. She reads 20 pages each day. How many days will it take to finish?

A. 20 + 110p = 290
B. 20p + 290 = 110
C. 110 + 20p = 290
D. 290 = 110 - 20p

Answers

Tehra has read (completed)=110Total pages=290

Pages left:-

[tex]\\ \sf\longmapsto 290-110=180[/tex]

She read everyday=20

Total days

[tex]\\ \sf\longmapsto \dfrac{180}{20}=9[/tex]

If days be p the equation will be

[tex]\\ \sf\longmapsto 20p+110=290[/tex]

the answer is C!!!!!!!!!!!!!

Someone help please!!!!!

Answers

the answer is (B)…………

-3 (x -4/3) < 6
pls help me pls help me

Answers

answer is -2/3 . Thanks a lot for giving point.

The answer is -2/3.
x > -2/3

Rectangle A and Rectangle B are similar. Rectangle A has side lengths of 16 and 8. Rectangle B has a side length of 32. What are the possible values for the length of the other side of Rectangle B? Select all that apply.

12
16
38
64

Answers

Triangle A and triangle B have a Similarity coefficient equal to 2 (32/16)

If 32 is the largest side therefore the other side is 16

If 32 is the smallest side so another side is 64

Answer : 16, 64

Answer:

16，64

Step-The side with a side length of 32 may be the long side or the short sideby-step explanation，so there are two cases：

1、the long side: 16/8=32/X，X=16

2、the short side：16/8=X/32，X=64

The expression below shows how to convert 12 gallons to cups with one part missing

Which value completes the expression?

Answers

Your answer is c!!!
Hdjdjndjdndnndndndnndn

Answer:

c

Step-by-step explanation:

is what I did correct

Answers

Answer:

Yes.

Step-by-step explanation:

Yes, it is correct. It can also be 73 = v + 29

This shape is made of four congruent kites meeting at a point. Calculate the size of Angle K.

Answers

Answer:

k = 115°

Step-by-step explanation:

Hope it helped.

• • •

90 + 2k + 40 = 360

2k = 360-130

2k = 230

k = 115

Angle K = 115

Answered by gauthmath pls make brainliest and comment thanks

Last week, Lamar had $983.45 in his checking account. Since then, he paid $214.67 for his car loan. He also donated $15 to the fire department. Then, Lamar deposited the $50 check his grandma sent him for his birthday. What is Lamar's balance now?

Answers

803.78

983.45 - 214.67 - 15 + 50

Answer:

$803.78

Step-by-step explanation:

983.45-214.67-15+50=803.78

I Have A Comic Book That Has An Advertisement About Advanced Dungeons and Dragons, And I'm Considering Getting The Board Game And I Don't Know How To Play normal Mode And I Have No One To Show It To For Ideas On What To Do With Board Game??

Answers

Answer:

You just play board game I will teach You What You dont know

Answer:

Sell it? They sell quite high on ebay.

Step-by-step explanation:

three fewer than four times a number is five more than twice the number. What is the number
A. 1
B. 2
C. 4
D. -1/3

Answers

Answer:

C.4

4x-3=2x+5

x=4

Step-by-step explanation:

The number which is "three fewer than four times a number is five more than twice the number" is 4.

Linear Equation

The equation having the highest power of its variables as 1 is known as a linear equation.

How do we find the number?

Let the required number be x.

The given condition is - "Three fewer than four times a number is five more than twice the number."

Based on the given condition we will form an equation and solve it for x to find the required number.

The resulting linear equation is,

4x-3 = 2x+5

4x-2x = 5+3

2x = 8

x = 4

Hence, the required number is 4.

Learn more about linear equations here - https://brainly.com/question/1682776

#SPJ2

[MATH, 17 POINTS]

The two dot plots below show the heights of some sixth graders and some seventh graders:

[CHECK IMAGE DOWN BELOW]

The mean absolute deviation (MAD) for the first set of data is 1.2 and the MAD for the second set of data is 0.4. Approximately how many times the variability in the heights of the seventh graders is the variability in the heights of the sixth graders? (Round all values to the tenths place.)

3.2
3.0
1.5
0.8

Answers

Answer:

It is either 3.0 or 1.5 i forgot

Step-by-step explanation:

Answer:

The answer is 3.0  

Step-by-step explanation:

I forgot the explanation but I am fully 100 % sure this is the correct answer. Because I have done this question.   I hope you got your answer friend :)

Andy had 20% fewer marbles than Henry. When Andy gave 80 marbles to Henry, the number of marbles he had left was half of what Henry had. How many marbles did Andy have in the beginning?

Answers

Answer:

I think it is 400

Not 100% sure

Step-by-step explanation:

*a=andy

h=henry

(h+80)x2=a-80

20%a=h

(20%a+80)*2=a-80

40%a+160=a-80

40%a+240=a

240=a-40%a

240=60%a

400=a

Andy has 320 marbles while Henry has 400 marbles.
Explanation:
Although there are two people involved in this problem, we can solve it by using one variable.
Let the number of marbles that Henry has be
x
Andy has
80
%
x
and
Henry has
100
%
x
or, Andy has
0.8
x
marbles and Henry has
x
marbles
Andy now gives 80 marbles to Henry, so he has 80 fewer marbles and Andy has 80 more marbles.
Andy has
:
(
0.8
x
−
80
)
and Henry has
(
x
+
80
)
Andy now has half as many as Henry , which means that Henry has twice as many as Andy.
Don't make the mistake of doubling Henry's marbles!

He already has more than Andy, Doubling what Andy

has will be the same as what Henry has.
2
×
Andy's marbles
=
Henry's marbles
2
(
0.8
x
−
80
)
=
x
+
80
1.6
x
−
160
=
x
+
80
0.6
x
=
80
+
160

0.6
=
3
5
5
3
×
3
5
x
=
240
×
5
3
x
=
400
From our original definition of
x
we now know that Henry has 400 marbles.
Andy has
80
100
×
400
=
320
marbles

A dice is rolled twice and the result the result of each roll is added together. What is the probability that the sum is equaled to 2?

Answers

Answer:

1/36

Step-by-step explanation:

to get a sum of 2 you must roll a 1 both times. The probability of this is (1/6)*(1/6)=1/36

Answer:

1/36

Step-by-step explanation:

There are 36 total possibility, and 2 is one of them

The real estate term lake frontage refers to the distance along the edge of a piece of property where it touches a lake. Determine the lake frontage of Lot B to the nearest tenth.

answer fast

Answers

Answer: Part a) The lake frontage  of lot A is 50.9 yd

Part b) The lake frontage  of lot B is 58.4 yd

Part c) The lake frontage  of lot C is 64.7 yd

Part d) The prices of the other lots, from least to greatest, are $286,836.94  and $317,779.96

Step-by-step explanation: Took this test in middle school and im now in 10th grade... your welcome.

Can you guys help me? The question is in the image

Answers

The 2 will repeat hope this helps <3

draw the graph of the line with y intercept of 4 that passes through point (-1, 3)

Answers

Answer:

I want to help but i cant draw graph

Step-by-step explanation:

i'm not sure how to post pictures on here :(((

Please help thx and will mark as brainliest if you do it correct!

Answers

. A quadratic equation is graphed above.
Which of the following equations could be
paired with the graphed equation to create
a system of equations whose solution set is
comprised of the points (2,-2) and (-3, 3)?
Here ya go! :D (red is -5 slope with 4 y-intercept and black is the other one)

Help please!!! I only have 10 minutes!!

Answers

I think 0.7 would be it

[tex] - 0.7[/tex]

Step-by-step explanation:

[tex] \frac{1}{2} ( - 1.4m + 0.4) [/tex]

[tex] = - 0.7m + 0.2[/tex]

I put 29 points into this answer the png

Answers

Answer:

k > 24

Step-by-step explanation:

To solve an inequality you must isolate the variable. Do this by using the properties of equality, specifically the property of multiplication. To get k by itself multiply both sides by 4. This way k > 24. Then, you can check your answer by plugging in any number less than or equal to 24 and solving to see if it's true.

Answer:

k = 24

Step-by-step explanation:

k is greater than or equal to 24 and 4/4 = 1 so if k is greater than or equal to 24 than that could be 24/4 and that would equal 6. that is the answer to your question.

The box plots shown represent the snowfall amounts at a ski resort for two different years. Use the box plots to compare the data sets.


Drag each value to show if it is greater for 2014, greater for 2015, or if there is not enough information to tell.

Answers

Answer:10

Step-by-step explanation:

the scatter diagram shows the results of 10 students in their french and Spanish test

Answers

(90, 16)

( x , y )

and I need to add more characters so, banana, am'i'right?

(90,60)

(X,Y)

Bru hate it when I gotta add more things

Help with this two pls

Answers

Answer:

I'm not sure about 20 but here's 21.

Part A is 274.622.

Part B is 282.018

Step-by-step explanation:

Part A show work:

278.320

-     3.698

________

 274.622

Part B show work:

278.320

+    3.698

________

 282.018

20. Seens to 1. 21. A. 21. B
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