Mathematics Middle School

What is the sum of -2x³ + x-3 and x³ - 3x - 4?
(a) Show your work.
(b) Is the sum of -2x³ + x-3 and x³ - 3x - 4 equal to the sum of x³ - 3x - 4 and
-2x³ + x-3? Explain your answer.

Answers

Answer 1

Answer:

Step-by-step explanation

For the first sum you nee to find the same coefficient or add or subtract a number

[tex]-x^3 -2x -7[/tex]

This the simplified version of the sum above. I have basically subtracted -2x^3 by x^3 to make -x^3. Then I have subtracted -3x and x to make -2x. Finally I have added -4 and -3 as the rule suggests to add two numerals the minus symbol on both of them.

The next sum we have to simplify both numerals so we know if both sum’s answer are

[tex]-x^3 -2x -7-x^3 -2x -7[/tex]

After simplifying them,  both of them have the same answer, so the statement is true. To explain this, we could say that the sums were basically rotated around to trick us but the answer is still the same

Answer 2
You have to simplify them

Related Questions

Evaluate.
4 to the power of 3

Answers

Answer:64

Step-by-step explanation:

it means you should mutliply 4 with itself 3 times:

4*4*4=64

Answer:

64

Step-by-step explanation:

4^3 = 4*4*4=64

Directions: Follow the instructions for the following inequalities.


1. 4 < 7 Multiply both sides by 3, then by 2, then by 4, then by 9


2. 11 > -2 Add 3 to both sides, then add 3, then add (-4)


3. -2 less than or equal to -2 Subtract 6 from both sides, then 8, and then 2


4. -4 < 8 Divide both sides by -4, then by -2


5. Write a short explanation of the effects of the above operations. Did this affect the inequality sign? Was it still true? Why or why not?

Answers

Answer:

1. 504 < 1512

2. 12 > 0

3. -2 = -2

4. -1 < 2

Step-by-step explanation:

Given that both sides are being changed by the same amount and sign, the sign never changes. They always have the same value.

The answer is -2 because after you multiply you have to divide

What do we divide the numerator and denominator by to simplify
12/30 to lowest terms? (What is the largest number we can divide both the numerator and denominator by?)

Answers

Answer:

The factors of 12 are 1, 2, 3, 4, 6, and 12.

The factors of 30 are 1, 2, 3, 5, 6, 10, 15, and 30.

The largest number that both 12 and 30 have in common is 6.

So, we can divide both the numerator and denominator by 6:

12/30 ÷ 6/6 = 2/5

Therefore, 12/30 simplified to lowest terms is 2/5.

Answer:

Divide the numerator and denominator by 6:

[tex] \frac{12}{30} = \frac{2}{5} [/tex]

Step-by-step explanation:

12 = 2 × 2 × 3

30 = 2 × 3 × 5

GCD of 12 and 30 = 2 × 3 = 6

35 is 64% of what number? Round your answer to the nearest hundredth if necessary.

Answers

Answer:

11 4/7

Step-by-step explanation:

The answer is : 54.69

The measures of the legs of a right triangle are 15 m and 20 m. What is the length of the hypotenuse?
A. 625 m
B. 35 m
C. 30 m
D. 25 m

Answers

The answer issssss D

Answer: The answer is D. 25 m

Step-by-step explanation:

Provide brainliest please.

please help me fast to please and if you get it right I will mark you as brainlyst and plut 15 poing please I beg you fast

Answers

Answer:1.5

Step-by-step explanation:

What is the answer to this, can anyone please help?

Answers

Use a graph and plug in the equation. Whatever points you get from it, that’s the answer.

Answer:

Step-by-step explanation:

Substitute all ordered pairs into respective equation:


[tex]-2-3(0)=6\\-2\neq 6[/tex]

[tex](-2,0)[/tex] is not a solution.

[tex]6-3(0)=6\\6=6[/tex]

[tex](6,0)[/tex] is a solution.

[tex]-6-3(-4)=6\\-6+12=6\\6=6[/tex]

[tex](-6, -4)[/tex] is a solution.

[tex]4-3(6)=6\\4-18=6\\-14\neq 6[/tex]

[tex](4, 6)[/tex] is not a solution.

[tex]0-3(-2)=6\\0+6=6\\6=6[/tex]

[tex](0,-2)[/tex] is a solution.

[tex]0-3(6)=6\\0-18=6\\-18\neq 6[/tex]

[tex](0,6)[/tex] is not a solution.

Hope this helps :)

Help I will mark you as a brainliest

Answers

Answer: $7.24

Step-by-step explanation:

Answer:

: 1 gallon of milk equals $3.49

Step-by-step explanation:

which number line shows the solution to the inequality?

Answers

Answer:

3rd point see explanation

Step-by-step explanation:

y-2<-5

y-2+2<-5+2

y<-3

Help me please I don't know what to do.

Answers

Answer is B, there ya go.

the second one!!


hope this helps!

solve for all the letters. urgent!

Answers

Answer:

Step-by-step explanation:

A: -155.15
B: -223.75
C: -1.40
D: -4.40


Brainliest?

Please help me and answer this.

Answers

Connect the points and find the distances. Then match them up with one of the answers till you get the right one.

A road crew can repave 1/30 miles of road each hour. They must repave a road that is 2/5 miles long. How long will it take the crew to repave the road?

Write your answer in simplest form.

Answers

Answer: 12 hours
Total length of road: 2miles/5
Amount repaved per hour: 1/30
Solving using the unitary method:
The quality is true and it’s 25 I think

math homework due tomorrow please help

Answers

Inequality Notation: x<1

And then on number line:

(in image)

May I please have brainliest? :))

x < 1


5x/5 < 5/5

1. divide both sides by the same factor

2. Cancel terms that are in both the numerator and denominator

3. Divide the numbers

which angles are supplementary to each other? select all that apply

Answers

A supplementary angle is angles that when added together equals 180 degrees

The answers would be:
Angle 4 and 4

They are the only two angles that add up to 180 degree
Angle 4and5 are supplementary to each other

Which number line shows the graph of x>11

Answers

Answer: the second one.

Step-by-step explanation:

it means any number greater than or equal to 11. so it would be a closed circle going towards any number greater than 11 :)

Answer: 2

Step-by-step explanation:

Please help I'm desperate -Attachment-

Answers

Answer:

1. c. 276ft

2.56ft

Step-by-step explanation:

1. I took the length and multiplied that by the width to get the area

2.

Answer:

1. C

2. D

Step-by-step explanation:

For question 1 you would multiply 23 by 12 because the area of a rectangle is base * height. To get 276 which is C.

For question 2 you would find the area by doing 1/2(b*h) or 1/2(7*4) which equals 14. To find the area of 4 triangles you would then do 14*4 which equals 96.

Question 1: What angle is R?
Question 2: What angle is G?

Answers

Answer:

the square(r)=90 degrees and a triangle = 180 degrees so angle g=55

Step-by-step explanation:

r = 90°
because it is the right angle

g = 55 °

35° + 90° + 55° = 180°

(URGENT!) Answers and work please

Answers

Answer:it can be a trapezium it is a quadrilateral

with one set of parallel side isnt the bottom angle 91.5 or its is 88.5

Step-by-step explanation:

two-thirds less than a number

Answers

Answer: X - 2/3

Step-by-step explanation:

x is the number

the number, x, is having 2/3 taken away from it

The keyword less tells you to subtract. So let’s your the variable Y for example. Your going to subtract 2/3 from Y. So that would be Y- 2/3!

The length of time, y hours, it takes to put a jigsaw puzzle together is inversely proportional to the number of children, x, working on it. It takes 6 hours for 16 children to put the jigsaw puzzle together. How many children are needed to put the same jigsaw puzzle together? How many children are needed to put the same jigsaw puzzle together in 4 hours?

Answers

Answer: up to 120 pieces

Step-by-step explanation:

PLEASE HELP THIS IS URGENT

What is the volume of the composite figure.


A. 104ft

B. 120ft

C. 150ft

D. 160ft

Answers

Answer:

D

Step-by-step explanation:

Answer:

I'm getting 140, though

Step-by-step explanation:

120 i think

A cylinder shaped container has a radius of 20 meters and a height of 100 meters. A glass sphere with a radius of 12 meters is placed inside the cylinder shaped container and then the container is completely filled with water.

What is the approximate volume of water contained in the cylinder?

Use 3.14 for pi.

Responses

24,165 m³
24,165 m³

31,400 m³
31,400 m³

118,365 m³
118,365 m³

125,600 m³

Answers

Answer:

'What is the volume of the water contained in the cylinder? A cylinder-shaped container has a radius of 20 meters and a height of 100 meters_ A glass sphere with a radius of 12 meters is placed inside the cylinder-shaped container and then the container is completely filled with water What is the approximate volume of water contained in the cylinder? Find the volume of a cylinder: v = pi fresh Find the volume of sphere V = 3x pi volume of cylinder volume of sphere final answer Use 3.14 for pi_ 0 24.165 Mj 31,400 m" 118,365 m" Finish'

Step-by-step explanation:

The answer is (3,-2)
Use substitution 3=x and -2=y

PLS HELPPPPPPPPPPPPP
Nadia is a stockbroker. She earns 12% commission each week. Last week, she sold $6,400 worth of stocks. How much did she make last week in commission? If she averages that same amount each week, how much did she make in commission in 2011?

Answers

Answer:

Nadia made a commission of 768 last week

The amount she made in 2011 is 40,045.824

Step-by-step explanation:

What is a commission?  

A commission is the fee got for the services, given by the percentage of the total worth.

If Nadia gets a 12% commission for $6400,

Commission = percentage ×  worth of stock

                    = 12% × 6400

                    = 768

There are 52.143 weeks per year.

The amount of commissions she made in 2011 is,

768 × 52.143 = 40,045.824

Hence, Nadia made a commission of $852 for $6400 worth of stocks. If she averages the same amount each week, Nadia made a commission of $40,045.824

nadia had made 768 in the last week. she made 40,046.24 in 2011

Find the volume of the pyramid. Round to the nearest tenth if necessary.

Answers

Answer:

410.6 cubic cm

Step-by-step explanation:

Formula V = (l x w x h) / 3

        V =       ( 8 x 14 x 11) / 3

        V =   1232 / 3

        V = 410.6 cubic cm

Help, does anyone know the answer to this one?

Answers

Answer:

.

Step-by-step explanation:

Answer this for me!!

Answers

Answer:A=2b square root 2

Step-by-step explanation: the base is b and the exponent is 2 the factor b repeats2 time so the base is b and exponent is 2

A=2b square root 2 because base b is the root and that repeats 2 times

Create a number line that represents the solution set of the inequality w divided by 7 > 38. Show all your work

Answers

Answer:

Step-by-step explanation:

To represent the solution set of the inequality w divided by 7 > 38 on a number line, we first need to isolate the variable w:

w/7 > 38

w > 7 x 38

w > 266

This means that any value of w greater than 266 satisfies the inequality.

We can represent this on a number line by marking a closed circle at 266 (since the inequality is not inclusive of this value), and drawing an arrow to the right to indicate all values greater than 266:

<--o======(266)---------------->

This represents the solution set of w/7 > 38.

Please I need some help.

Answers

a) 9w-126=45

b) +126 +126
9w=171
__ __
9 9

w= 19

19 weeks

Answer:
A: 9w-126=45

B: +126 +126, 9w=171

Step-by-step explanation:

One kilogram is 2.2 pounds. Complete the tables. What is the interpretation of the constant of proportionality in each case?
pounds
2.2 11 5.5 1
kilograms
1
pounds
2.2
______ kilogram per pound
kilograms
1
7 30 0.5
______ pounds per kilogram

Answers

Answer:

Step-by-step explanation:

3 and 5

For the first is 3 and the second is 5
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