Mathematics Middle School

someone, please help me. I need this done by today. Also, if you do do it, can you write part a and then part B​

Someone, Please Help Me. I Need This Done By Today. Also, If You Do Do It, Can You Write Part A And

Answers

Answer 1

Answer:

Step-by-step explanation:

Part A:  step 1 is correct, step 2 is wrong.  Right side of the equation should be 12 - 21 = -9

Part B:

-14x + 21 = 30x + 12

-14x - 30x = 12 - 21

-44x = -9

x = -9/-44 = 9/44

Related Questions

The surface of the cuboid below is 128cm squared. Find the length x.

Answers

Answer:

x = 6 cm

Step-by-step explanation:

The surface area: 128 cm^2

32 + 16x = 128

Note: The surface area of a cuboid consists of 6 faces

16x=96 -> x = 6

Answer:

Step-by-step explanation:

The total surface area = 2(lb+lh+bh)

With given information, 2(4x+4x+4*4) = 128

=> 2(8x+16) = 128

=> 16x + 32 = 128

=> 16x = 96

=> x = 6

Therefore, the length = 6

If y = 17 inches, z = 24 inches, h = 7 inches, and w = 3 inches, what is the area of the object?

Answers

The base of triangle = z
Area of triangle =0.5*base*y
0.5*24*17=84
Area of rectangle=z*w
=24*3=72
Area of the object = area of triangle+area of rectangle
=84+72=156
The main answer is 8,568 inches.

Explanation:
Area is the product of all the side multiplied. Using this knowledge, you can figure out that 7x3 is 21 multiplied by 17 is 357 then multiplied by 24 is 8,568, thus showing that the answer is 8,568 inches.

please help math sucks

Answers

Answer:

w<13

Step-by-step explanation:

w<13 means that 13 is bigger than w and w is smaller than 13

The answer is because they width aka w is less then 13 so how I learned this was thinking of < as a mouth is the person going to want more food or less food? It would want more food making the answer be w < 13

please help math sucks

Answers

Answer:C

Step-by-step explanation:

x>6 shows he should walk at least 7 blocks or more.

Answer: sam wallked more than 6 blocks to get to his friends house

Step-by-step explanation:

since the sign is > it means greater than and < means less than so it goes down to the bottom two an the last option says no more than wich is ig another word for less than.

The point (−8, −10) was reflected over an axis to (8, −10). Which axis was it reflected over? Explain.

x-axis, because the x-coordinate is the opposite
x-axis, because the y-coordinate is the opposite
y-axis, because the x-coordinate is the opposite
y-axis, because the y-coordinate is the opposite

Answers

Answer:

y-axis, because the x-coordinate is the opposite

The point has been mirrored over the y axis (vertical).

y-axis, because the x-coordinate is the opposite

There are x students in Mrs. Sproul's class, 4 fewer than twice as many as are in Mrs. Puccio's class. If there are y students in Mrs. Puccio's class, then what is the value of y in terms of x?

Answers

Answer:

y= (X x 2) - 4

Mrs.Puccio class = double of Mrs.Sproul's class - 4 students

The answer you are looking is y=(x*2-4

Rewrite as a quotient of two common logarithms. Write your answer in simplest form. [tex]log_ {9} 7=[/tex]

Answers

log 97 is the answerrr

Please help!!!!! 40 points!
Josiah kept track of how many songs of each genre were played in an hour from his MP3 player. The counts are displayed in the table below. He has a total of 1,500 songs on his player. Josiah predicted the number of rock songs on his MP3 player to be 300 songs. Which statements about his solution are true? Select three choices.

Josiah’s Music
Sample 1
Sample 2
R & B
5
R & B
4
Pop
4
Pop
3
Classical
3
Classical
5
Jazz
2
Jazz
4
Rock
6
Rock
4

Josiah’s work:

StartFraction 10 over 20 EndFraction = StartFraction x over 1,500 EndFraction. StartFraction 10 times 30 over 20 times 30 EndFraction = StartFraction x over 1,500 EndFraction. 300 = x.
He should have found the average of the number of rock songs by averaging 4 and 6 to get 5.
He did not multiply the numerator and denominator by the correct number to equal 1,500.
His answer will be one-half of what he got because he did not divide 10 by 2 when setting up the proportion.
He can only solve the proportion by multiplying the numerator and denominator by a common multiple.
He should have multiplied the numerator and denominator by 75, not 30, because 20 times 75 = 1,500.

Answers

Answer:

Step-by-step explanation:d

Rima’s age is 10 years less than twice her father’s age.What is the difference bettwen their ages?


Grade#7

Answers

Answer:

x-10

Step-by-step explanation:

let her father be x

then

rima's age is 2x-10

X-10

Rima: 2x - 10

10 = 10 years less

2x = twice rimas fathers age

what is the surface of this sphere with a radius of 10 mn

Answers

Answer: The surface area of a sphere with a radius of 10 in is 400π square inches.

Step-by-step explanation:

The formula for surface area of a sphere is 4pi(r)sq, where r stands for radius. Feel free to clarify if you have any questions!

Division problem: Jojo has 2 days to get ready for a trip to Washington State. She has 200 items to bring and 4 suitcases. How many items should she put into each suitcase?

Answers

Answer:

50 in each case

Step-by-step explanation:

200÷4=50

50 items in each case

50 in each case.
200/4= 50

how do you find surface area with a detail explanation.
giving briniest.

Answers

Surface area is the total area on the surface of a three-dimensional shape. The main formula you can use is SA = 2lw + 2lh + 2hw. This means that you would first multiply the length by the width and multiply that product by 2, multiply the length and the height and multiply that product by 2, and lastly multiple the width and the height and multiply that product by 2. After you multiply what you need to multiply, you add all of your products together, thus resulting in the surface area of the figure.
The formula for surface area depends on the shape
Here are some common ones
Cuboid: 2(lb+bh+hl)
Cube:6l^s
Cylinder:2 x 22/7 x r(r+h)

1. Last month, Lucy and Britney each read three books. The tables show the number of pages in each book and the time it took Lucy and Britney to read each book. Which of the tables, if any, represent a proportional relationship?

A) Lucy's table represents a proportional relationship.

B) Neither Lucy's nor Britney's tables represent a proportional relationship.

C) Both Lucy's and Britney's tables represent a proportional relationship.

D) Britney's table represents a proportional relationship.


2. Which statement is TRUE?

A) The constant of proportionality for Lucy's table is 26.

B) The constant of proportionality for Britney's table is 26.

C) The constant of proportionality for Lucy's table is 28.

D) The constant of proportionality for Britney's table is 28.

Answers

C is the right answer
The answer to both of them is A

PLEASE TELL ME WHAT"S THE ANSWER AND SHOWM E HOW YOU GOT THE ANSWER

Answers

12/6

Step by step
12 divided by 2= 6

Given that a company lets you download songs for $0.99 each after you pay a $5 fee to be a member, evaluate f(4) for the function of total cost for x songs.

1. 3.96

2. 9.90

3. 21. 96

4. 8.96

Answers

Answer: 4

Step-by-step explanation:

Please assist if you know math. Thank you for your patience.

Answers

Answer:

42

Step-by-step explanation:

area of rect. + area of triangle

l x b + 1/2 x b x h

4 x 9 + 1/2 x 3x 6

36 + 6 = 42

Write the prime factorization of 1008 and 1323. Then
reduce 1008/1323

Answers

Answer:

The prime factorization of 1008 is:

1008 = 2^4 × 3^2 × 7

The prime factorization of 1323 is:

1323 = 3 × 19 × 23

To reduce 1008/1323, we need to simplify the fraction by dividing the numerator and denominator by their greatest common factor (GCF). To find the GCF of 1008 and 1323, we can use their prime factorizations. The only common prime factor they share is 3, so the GCF is 3.

1008/1323 = (3 × 336)/(3 × 441) = 336/441

We can simplify this fraction further by dividing both the numerator and denominator by 7, which is the GCF of 336 and 441.

336/441 = (7 × 48)/(7 × 63) = 48/63

Finally, we can simplify this fraction by dividing both the numerator and denominator by their GCF, which is 3.

48/63 = (3 × 16)/(3 × 21) = 16/21

Therefore, 1008/1323 simplified is 16/21.

Step-by-step explanation:

Help pls explain due at 7:45
What is the mean of the following set of numbers?

121, 347, 45, 21, 300, 614, 312, 333, 421

A.279.3
B,no mean
C.312
D.251.4

Answers

Answer: 279.3

Explanation:

Mean is the sum of all numbers added together, divided by how many numbers are in a sequence.

121+347+45+21+300+614+312+333+421= 2514

2514÷9=279.333..

A. 279.3 is the correct answer
Correct if i’m wrong

Simplify the following

5/8 × 6/7

Answers

Answer:

15/28

Step-by-step explanation:

5/8 × 6/7

multiply the numerators by numerators and denominators by denominators

5×6= 30

8×7= 56

30/56 simplified to give 15/28

Answer:

15/28

Step-by-step explanation:

5×6 = 30

8×7 = 56

so we have 30/56

which then we simplify by 2

30÷2 = 15 & 56÷2 = 28

= 15/28

A steak costs $4 more than a hamburger, and a hamburger costs $4 more than a grilled cheese sandwich. If six grilled chees sandwiches cost 2x dollars, how much will 4 steaks and 2 hamburgers cost?

(I understood this question but I don't know why I am keep getting the wrong answer lol)

Answers

Answer:

6(x/3)+ 40= 2x+ 40.

Step-by-step explanation:

Let "C" be the cost of a grilled cheese sandwich.

"A hamburger costs 4 more than a grilled cheese sandwich" so a hamburger costs C+ 4.

"A steak costs 4 more than a hamburger" so a steak cost (C+ 4)+ 4= C+ 8.

"If 6 grilled cheese sandwiches cost 2x dollars" then 6C= 2x so C= 2x/6= x/3.

"how much will 4 steaks and 2 hamburgers cost?"

One steak cost C+ 8 so 4 steaks cost 4(C+ 8)= 4C+ 32. One hamburger cost C+ 4 so 2 hamburgers cost 2(C+ 4)= 2C+ 8. Together that would be 4C+ 32+ 2C+ 8= 6C+ 40.

Since C= x/3, 4 steaks and 2 hamburgers cost 6(x/3)+ 40= 2x+ 40.

paulo used clay to make the cube shown.he wants to make a larger cube with an edge length that is twice as long.how many ounces of clay does he need to make this larger cube?

Answers

Answer:

8 times more clay than the original cube

Step-by-step explanation:

There's no picture here so I'll say it variably. If the original cube has side length [tex]x[/tex], then the amount of clay needed is [tex]x^3[/tex] because the formula for volume of a cube is [tex]v=s^3[/tex]. Similarly, a cube with side lengths twice as long would have a side length of [tex]2x[/tex]. The volume of this new cube would be[tex](2x)^3=8x^3[/tex], 8 times the volume of the original cube.

The points (0, 0), (–3, 3), and (0, 6) are three vertices of a square. What are the coordinates of the fourth vertex of the square?
PLEASE ANSWER QUICKLY

Answers

Answer:

(3,3)

Step-by-step explanation:

and you basically flip the (-3,3) cordnet

(3,3) is the answer to your question

i really need help please

Answers

Answer: -10, -7, -5, -3, -2.1, -2.01, -2.001.

Step-by-step explanation: The numbers you need to pick, have to be less than -2. -10, -7, -5, -3, -2.1, -2.01, and -2.001, are less than 2. -2, -1.999, -1.99, -1.9, -1, 1, 3, and 6, are all greater than 2, so they won't fit the equation.

help I'm not sure what the answer is.

Answers

Answer:

I think it's b 433.75

Step-by-step explanation:

I added 18.75 + 15 = 33.75 + 400 = 433.75

PLEASE HELP WILL GIVE BRAINLIEST!--

What value of y makes the equation true?

3(2y + 3) = 9y - 15

Answers

Answer:

8

Step-by-step explanation:

First, distribute the 3 on the left side of the equation:

6y + 9 = 9y - 15

Next, move the variables to one side of the equation and the constants to the other:

6y - 9y = -15 - 9

Simplifying the left side:

-3y = -24

Finally, solve for y by dividing both sides by -3:

y = 8

Therefore, the value of y that makes the equation true is 8.

your answer will be y=8

What is the product of 5 1/2 and 3 3/4?

A. 22 3/8

B. 21 1/4

C. 20 5/8

D. 15 3/8

Answers

C:

5 1/2 * 3 3/4 = 165/

8

= 20 5/

8

= 20.625

Conversion a mixed number 5 1/

2

to a improper fraction: 5 1/2 = 5 1/

2

= 5 · 2 + 1/

2

= 10 + 1/

2

= 11/

2

To find a new numerator:

a) Multiply the whole number 5 by the denominator 2. Whole number 5 equally 5 * 2/

2

= 10/

2

b) Add the answer from the previous step 10 to the numerator 1. New numerator is 10 + 1 = 11

c) Write a previous answer (new numerator 11) over the denominator 2.

Five and one half is eleven halfs.

Conversion a mixed number 3 3/

4

to a improper fraction: 3 3/4 = 3 3/

4

= 3 · 4 + 3/

4

= 12 + 3/

4

= 15/

4

To find a new numerator:

a) Multiply the whole number 3 by the denominator 4. Whole number 3 equally 3 * 4/

4

= 12/

4

b) Add the answer from the previous step 12 to the numerator 3. New numerator is 12 + 3 = 15

c) Write a previous answer (new numerator 15) over the denominator 4.

Three and three quarters is fifteen quarters.

Multiple: 11/

2

* 15/

4

= 11 · 15/

2 · 4

= 165/

8

Multiply both numerators and denominators. Result fraction keep to lowest possible denominator GCD(165, 8) = 1. In the following intermediate step, it cannot further simplify the fraction result by canceling.

In other words - eleven halfs multiplied by fifteen quarters is one hundred sixty-five eighths.

In 1803 the United States purchased the Louisiana Territory from France
for $15 million. In 1867 the United States purchased Alaska from Russia
for $7.2 million. The purchase of Alaska occurred how many years after
the purchase of the Louisiana Territory?

Answers

Answer: 64 years later

Step-by-step explanation:

67 - 3 = 64

A designer creates a drawing of a triangular sign on centimeter grid paper for a new business. The drawing has sides measuring 6 cm, 8 cm, and 10 cm, and angles measuring 37°, 53°, and 90°. To create the actual sign shown, the drawing must be dilated using a scale factor of 50.

Part 1 out of 4
Find the lengths of the sides of the actual sign.
__ cm, ___ cm, ___ cm

Answers

Answer:
The actual length is 6*40=240 cm, 8*40=320 cm, 10*40=400 cm. And the angle measures of the actual sign will not change. The transformation can be turning over using the hypotenuse as axle. Or rotate the triangular sign 180° using the center of the triangle as the center of rotation. The turning over method will accomplish.
Step-by-step explanation:

What are the areas of these shapes?

Answers

Answer:

The first one is 60. The second is 18

Step-by-step explanation:

the linear function y = 5x + 6 represents the cost in dollars , "y" , for a person to bowl "x" games at a bowling alley. what is most likely represented at the y-intercept of this function?

A. The y- intercept is the cost of a large drink.
B. The y- intercept is the cost per hour to bow..
C. The y- intercept is the cost of a one time fee for renting bowling shoes.
D. The y- intercept is the number of games bowled.

Answers

The answer is c because it is a one time fee because you only need one pair of bowling shoes to bowl all of the games
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