Mathematics Middle School

the difference between three times a number and 7 is 14

Answers

Answer 1
3x -7 = 14

3x - 7 (+7) = 14 (+7)

3x = 21

3x/3 = 21/3

x = 7

hope this helps
Answer 2
the sentence in numerical form is 3x-7=14
to solve, add 7
3x=21
then divide by 3
x=7

Related Questions

plz help...A hair salon charges a fixed rate of $25.00 for a haircut and then an additional $15 for any other services. Write a function to model the cost of services there and then determine how many services you had if you were charged $115

A)
f(x) = 15x + 25; f(6) = 115


B)
f(x) = 25x + 15; f(6) = 165


C)
f(x) = 15x + 25; f(6) = 125


D)
f(x) = 15x + 25; f(115) = 1750

Answers

The answer is A 
Hope this helps!!
the answer is a because it says you were charged 115 and thats the only one with 115 

A cereal box is an example of a

Answers

rectangular prism that i know of
A cereal box has the shape of a Rectangular prism.
God Bless you :-)

Identify the domain and range of the table below

Answers

Domain: 3<x<6
Range: 11<y<8

If a television screen with a length-to-height ratio of 16:9 has an area of 576in, what is it's perimeter?

Answers

Final answer:

The perimeter of the television screen is 100 inches.

Explanation:

To determine the perimeter of a television screen with a length-to-height ratio of 16:9 and an area of 576 square inches, we need to find the length and the height of the screen first.

Using the ratio, we let the length be 16x and the height be 9x.

The area of a rectangle is given by its length times its height, so we have:

(16x) × (9x) = 57

144x² = 576

x² = 576 / 144

x² = 4

x = 2

Now we can find the actual dimensions:

Length = 16 × 2 = 32 inches

Height = 9 × 2 = 18 inches

The perimeter (P) of a rectangle is given by

P = 2 × (Length + Height)

P = 2 × (32 + 18)

P = 2 × 50

P = 100 inches

The perimeter of the television screen is 100 inches.

for f(x) = 3x + 1 and g (x) = x^2 - 6 find (fog)(4)

Answers

Then the answer to your question is 31. Hope this help you :)
f(x)=−6(4)−25=−24−25=−49

what's the greatest common factor between 18 and 100

Answers

the GCF of 18 and 100 is 2
The GCF is 2
18=1,18,2,9,3,6
100=1,100,2,50,4,25,5,20

A road sign gives drivers information about traffic on busy highways. One sign shows "15 miles in 20 minutes". What is this speed in miles pee hours?

Answers

First of all you need to work out 20 minutes in hours, this can be done by dividing 20 by 60:
20/60 = 1/3

Then you need to divide 15 by 1/3 to get the final speed:
15 / 1/3 = 45 miles per hour


He will need to be traveling at 45 miles per hour,
Hope this helps! :)
15/20 = mph/60

60 x 15 = 20 x mph

900 = 20 x mph

900/20 = mph

45mph is your answer.

PLEASE HELP!

Is it possible for a number to be a rational number that is not an integer but is a whole number? Explain

Answers

Every whole number is a rational number: for example, 3=31. So it is rational. Every whole number n can be written as a fraction of integers: n=n1. We aren't required to write it that way; we just need to know that it is possible to express every whole number as a fraction of integers, and hence it is rational.

what about 2.19 how do you spell it

Answers

So this may not be 100% right they do it different in some schools but the way I do it is,
Two point Nineteen In some cases it would be, Two point Nineteenth

Answer:

From my experience, in primary school they say: "two and nineteen hundredths," but when you get into secondary, and senior secondary school, they simply say "two point nineteen."

Step-by-step explanation:

[look above]

Solve for x: one over eight(8x + 15) = 24

Answers

1/8(8x + 15) = 24

First step is to distribute.
(1/8)*8x + (1/8)*15 = 24
8/8x + 15/8 = 24

Now subtract 15/8 from both sides.
x = 24 - (15/8)
x = (192/8) - (15/8)
x = 177/8
x = 22.125

The population in the South in 2000was 100,236,820. In 2010 the population increased by 14.3% from 2000. How many people live in the south in 2010

Answers

First get the percentage of increase by changing 14.3 percent to a decimal and multiplying 100,236,820  by .143

100,236,820 x .143 = 14,333,865

Now add 100,236,820 by 14,333,865 
100,236,820 + 14,333,865 = 114,570,685

Help plz explainnnnnn

Answers

The answers are choice B and choice C

----------------------------------------
----------------------------------------

Mr Nemo has 5 desks while Mr Benn has 2 desks

We can say the following
number of desks Mr Benn has = (2/5)*(number of desks Mr Nemo has)
2 = (2/5)*(5)
2 = 2

Which basically is the math translation of "Mr Benn has 2/5 as many desks as Mr Nemo", so that's why choice C is one of the answers.

-----------------

Flip things around and we get

number of desks Mr Nemo has = (5/2)*(number of desks Mr Benn has)
5 = (5/2)*(2)
5 = 5

Note: 5/2 = 2 & 1/2

This is a translation from "there are 2 & 1/2 times as many desks in Mr Nemo's room as in Mr Benn's room" pointing to choice B as the other answer. 

Please help me!!!!!!!!!!!!! I'll give brainleist !!
Alex is 3 times as old as he was 2 years ago. How old is he now?

Answers

If your looking for the answer, this question is invalid. However, if the question is asking for the function equation, the answer is y=3x-2
Let "a" represent Alex' age.  Translating the given sentence into symbols, 

a = 3(a-2).  Thus, a = 3a - 6, or 6 = 2a, or a = 3.

Alex is 3 years old now.   (Answer)

Check:

2 years ago he was (3-2), or 1, year old.  three times that does equal 3.

If ΔABC is dilated by a scale factor of 2 with a dilation center of A, what will be the coordinates of point B'?
A) (0, 0)
B) (0, 3)
C) (0, 4)
D) (0, 6)

Answers

The correct answer is 

D) (0, 6) 

A real number greater than or equal to 5.5

Answers

A real number = x or any variable

It would be x ≥ 5.5

what is is the measure of one angle of a non-regular pentagon

Answers

It will be less than 70 because 1 angle of pentagon is approximately 70 degrees.

 FREE BRAINIEST
What is the distance between points (5, 5) and (1, 5) on a coordinate plane? Enter the answer in the box.

Answers

The two points are 4 spaces away from eachother.

Answer: 4.

Explanation: since 5 and 5 are the both positive and the x components aren't you'd subtract the x components. Hope This Helped and Have a Blessed Day :D!

Solve for x.

−1/5(x−4)=−2

Answers

Solve for x.
−1/5(x−4)=−2

x=14
:)
x = 14  did u want to sovle for x or not

pranav's school is selling tickets to a play. On the first day of tickets sales the school sold 8 adult tickets and 4 child tickets for a total of $80. The school took in $64 on the second day by selling 6 adult tickets and 4 child tickets. What is the price each of one adult ticket and one child ticket?

Answers

Adult tickets are $8 and child tickets are $4

write three equivalent ratios for 10/12

Answers

10 to 12

10/12

and 

10:12


i hope this helps =)
5/6

20/24

30/36.


I interpreted the question this way:)

Can someone help me? (Algebra 1)

Answers

I believe real and rational.
Let's find out what the following terms mean, so we know what to choose from: 

 - An irrational number is a number that cannot be represented by a simple fraction. They can't be written as a ratio with two integers (like 55 = 55/1, 1.5 = 3/2, -.25 = -3/4). They are unable to repeat, and unable to end. Pi (3.1415926...) is a notable example of an irrational number. 1.7 as a fraction is 17/10. It can be written as a ratio with two integers, so it is not irrational. 

- A real number is a number that represents any quantity in a number line. It includes all numbers. Every number is a real number. So, 1.7 is a real number. 

- A whole number is a positive number (including 0) that does not include any fractions, decimals, radicals, etc. Numbers such as 5, 32 and 73 are considered whole numbers. 1.7 is not a whole number, since it is a decimal. 

- A rational number is a number that can be written as a fraction. Values such as whole numbers (ex: 3/1), negative numbers (ex: -7/1), decimals that can be successfully written as a ratio (ex: .5) are rational numbers. Unlike irrational numbers, these can end (3.4) and repeat (3.3333333333...). 1.7 is able to be written out as a fraction with two integers and it ends. It is a rational number. 

- A natural number is a positive whole number. So, naturals are greater than 0. numbers such as 1,2,3 and onward are natural numbers. 1.7 is a decimal;  it is not considered a natural number. 

- Integers are all the positive and negative whole numbers including zero. 123, -5000, and 34 are random examples of an integer. 1.7 is a decimal, so it is not an integer. 

God Bless. You are going to do great in not only math, but in all your classes! 

Mary never liked math and did poorly when she decided to think of it as a fun challenge her performance improved this is an example of

Answers

a competitive mindset seeing it as a challenge helps some people hope i helped

Answer:

Mary's improved math performance after seeing it as a fun challenge reflects a growth mindset, believing in the ability to develop skills through effort and dedication.

Explanation:

Mary's improved performance in math after deciding to think of it as a fun challenge is an example of the power of mindset, specifically a growth mindset. A growth mindset is the belief that abilities and intelligence can be developed through dedication and hard work. By shifting her perspective and viewing math as a fun challenge rather than something she was inherently bad at, Mary adopted a growth mindset. This change in mindset likely led her to approach math with more enthusiasm, effort, and persistence, ultimately resulting in improved performance.

Miko’s restaurant bill was $16. She used the expression 1.18(16) to find the total cost, including an 18% tip.

Which expression is equivalent to the amount Miko paid?

A.16 + 1.18

B.(1+0.18)16

C.16+0.18(16)

D.1+0.18(16)

Answers

C is most likely the answer.

I took a test and this question was on it the correct answer is B.


Please please please mark me as brainliest

Six people share 3/4 of peanuts equally. What fraction of a pound of peanuts does each person receive?

Answers

1/8 is the answer because 3/4 divided by 6/1 equals 1/8 flip second fraction over and multiply

line m contains the points with coordinates (-4,1) and (5,8) and line n contains points with coordinates (6,-2) and (10,7) .are the lines parallel,perpendicular,or neither? justify your answer

Answers

M would be negative 4 and 1 becuase of the ratio

If 2/3 out of 3/3 of the pie is eaten what fraction remains

Answers

3/3 - 2/3 = 1/3 of the pie is left.
2/3 out of 3/3 is eaten

3/3 - 2/3 = 1/3

1/3 remains 

hope this helps

Elena drove 245 miles last week & 222 miles this week.she estimated that she drove about 475 miles bin both weeks.how did she estimate

Answers

she add both of her miles together 

Answer:

This estimate is based on the addition of both the miles of both weeks by rounding them off.

Step-by-step explanation:

Elena drove 245 miles last week & 222 miles this week.

She estimated that she drove about 475 miles in both weeks.

This estimate is based on the addition of both the miles of both weeks by rounding them off.

245 is rounded to 250

222 is rounded to 225

Now adding both [tex]250+225=475[/tex] miles.

If the unit selling price is 2.50 and the unit cost is 1.00 what action is needed to maintain the gross margin percentage when unit cost increase 0.25

Answers

The original gross margin is (2.50 / 1.00) - 1 = (2.5 - 1) = 1.5  =  150%

the cost increases 0.25, is an increase of (0.25 / 1.00) = 25%

  in order to keep the same gross margin, you need to increase the sale price by 25%

2.50*1.25 = 3.125

Then the gross margin is (3.125 / 1.25) - 1 = (2.5 - 1) = 1.5 = 150% ( same as original )

Evaluate b2 − 4ac for a = −3, b = 5, and c = 2.

Answers

I believe the answer is -19
The answer is 49.
5^2= 25
-4*-3= 12
12*2= 24
24+25= 49

after a reflection over the line y=x (8,11) is the image of point c. what is the original location of point c

Answers

the original points/point c would be (-8,11) bc the y stays the same and the x changes from its original to (in this case) negative to positive
 
(positive to negative/negative to positive for either the x or y)

hope this helps
Final answer:

The original location of point C before a reflection over the line y=x, given that the image of point C is at (8,11), would be (11,8) as coordinates are swapped during such a reflection.

Explanation:

To determine the original location of point C before a reflection over the line y=x, you would apply a simple transformation rule. For any reflection over the line y=x, the coordinates of a point are swapped. Thus, if the image of point C is at (8,11), the original location of point C would have the x-coordinate as 11 and the y-coordinate as 8.

The step-by-step process to find the original location of point C before the reflection is as follows:

Take the x-coordinate of the image and make it the y-coordinate of the original point.Take the y-coordinate of the image and make it the x-coordinate of the original point.The resulting point is the original location of C before the reflection.

Therefore, the original location of point C is (11, 8).

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