Mathematics Middle School

Solve. 6(x+20)=168

A) x=4 2/3 B) x=8

C) x=24 2/3 D) x=28

Answers

Answer 1
6(x+20)=168

6(20 + x) = 168 (20 * 6 + x * 6) = 168 (120 + 6x) = 168

120 + 6x = 168

120 + -120 + 6x = 168 + -120




0 + 6x = 168 + -120 6x = 168 + -120

6x = 48

x = 8

Answer 2
6(x+20)=168
6x+120=168
-120=-120
__________
6x. =48
/6. /6

x=8

Related Questions

31.68 is 45% of what number?

Answers

31.68 is 45% of 70.4

n * 0.45 = 31.68
divide both sides bu 0.45

n=70.4

Answer:  The required number is 70.4.

Step-by-step explanation:  We are given to find the number of which 31.68 is 45%.

Let x be the required number.

Then, according to the given information, we have

[tex]45\%\times x=31.68\\\\\Rightarrow \dfrac{45}{100}\times x=31.68\\\\\Rightarrow x=\dfrac{3168}{45}\\\\\Rightarrow x=70.4.[/tex]

Thus, the required number is 70.4.

help below i think the question that i chose is right but i want a second opinion

Answers

The slope is 7, because from 0 to 3, the increase is 21, from 3 to 5 it is 14 and from 5 to 7 it is also 14.

The starting value is 13, this is given from x=0.

So the equation is y = 7x + 13, but that's not in the list.

We'll have to manipulate it until we find the formula that's equivalent. If we move the 13 to the left and the y to the right (the signs swap as you know), we get:

-13 = 7x - y

Swap the left and the right side and you get

7x - y = -13, that's answer D!

A number between 67 and 113 that is multiples of 4,6,8

Answers

the answer is 72 because 4x18=72,6x12=72 and 8x9=72
the answer is 72 because 4*18=72 6*12=72 8*9=72

2x+4y=12
y=1/4x-3
what is the solution to the system of equations ?
(-1,8)
(8,-1)
(5,1/2)
(1/2,5)

Answers

Answer: The solution of the system of the equation is, (8,-1)

Step-by-step explanation:

Using substitution method

[tex]2x+4y=12[/tex]      .......... (1)

[tex]y=\frac{1}{4}x-3[/tex]      ......... (2)

Now we are putting equation (2) into equation (1), we get the value of 'x'

[tex]2x+4(\frac{1}{4}x-3)=12[/tex]

[tex]2x+\frac{4}{4}x-4\times 3=12[/tex]

[tex]2x-x=12+12[/tex]

[tex]3x=24[/tex]

[tex]x=8[/tex]

Now put the value of 'x' in equation (2), we get the value of 'y'

[tex]y=\frac{1}{4}x-3[/tex]

[tex]y=\frac{1}{4}\times 8-3[/tex]

[tex]y=2-3[/tex]

[tex]y=-1[/tex]

Hence, the correct option is, (8,-1)

Final answer:

The solution to the system of equations is (-1, 8).

Explanation:

The given system of equations is:

2x + 4y = 12

y = ⅓x - 3

To find the solution to the system, we can solve it by substitution or elimination method:

Substitution Method:

From the second equation, we have y = ⅓x - 3.Substitute this value of y in the first equation.Replace y with ⅓x - 3 in the first equation: 2x + 4(⅓x - 3) = 12.Distribute 4 to both terms inside the parentheses: 2x + ⅓*4x - 12 = 12.Combine like terms: 2x + ⅓*4x = 12 + 12.Combine like terms: 2x + ⅓*4x = 24.Simplify: 2x + 4/4*x = 24.Simplify: 2x + x = 24.Combine like terms: 3x = 24.Divide both sides by 3 to solve for x: x = 8.Substitute the value of x in the second equation to find y: y = ⅓(8) - 3 = 2 - 3 = -1.

Therefore, the solution to the system of equations is (-1, 8).

WHAT IS THE RELATIONSHIP BETWEEN A DOMAIN, RELATION, AND RANGE??????

Answers

Relations are subsets of products A×BA×B where AA is the domain and BB the codomain of the relation.
A function ff is a relation with a special property: for each a∈Aa∈A there is a unique b∈Bb∈B s.t. ⟨a,b⟩∈f⟨a,b⟩∈f.This unique bb is denoted as f(a)f(a) and the 'range' of function ff is the set {f(a)∣a∈A}⊆B{f(a)∣a∈A}⊆B.You could also use the notation {b∈B∣∃a∈A[⟨a,b⟩∈f]}{b∈B∣∃a∈A[⟨a,b⟩∈f]}Applying that on a relation RR it becomes {b∈B∣∃a∈A[⟨a,b⟩∈R]}{b∈B∣∃a∈A[⟨a,b⟩∈R]}That set can be labeled as the range of relation RR.
Final answer:

The relationship between a domain, relation, and range in mathematics is that the domain represents the set of input values, the relation shows the relationship between input and output values, and the range represents the set of output values.

Explanation:

In mathematics, "a domain is the set of input values or independent variable in a relation or function". It represents the possible values for the input variable. A relation is a set of ordered pairs that shows the relationship between the input and output values. The range of a relation is the set of output values or dependent variable.

For example, let's consider a relation that relates the ages of students to their heights. The ages of the students would be the domain, the heights would be the range, and the ordered pairs would represent the relationship between age and height.

Learn more about Mathematics here:

https://brainly.com/question/27235369

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while mining Peter found a large metal bar that contains 22 grams of zinc Peter also determined that the bar was 55% zinc what was the total weight of the metal bar in grams

Answers

The answer is 31.9g
The other metal weighs 9.9 grams

11x-9=108 What is the answer to this equation?

Answers

11x-9 = 108

add 9 to both sides:

11x = 117

divide both sides by 11

x = 117 / 11 = 10.63636364

Write 30 : 84 as a ratio in simplest form

Answers

when you divide them, it's 15:42. since you can't divide more, it's the simplest form
Divide each by 6. The ratio becomes 5: 14.

Dee is driving home from a conference. The expression 705 – 60h gives the number of miles Dee is from home after driving h hours. Which best represents the meaning of the term 60h?


A. the number of miles Dee drove each hour



B. the number of miles Dee had to drive before she started



C. the number of miles Dee drove in h hours



D. the number of miles Dee had left to drive after driving h hours

Answers

705 - 60h

60h represents the number of miles Dee drove each hr

** she was 705 miles from home....she drives 60 miles per hr....so each hr she drives, she is 60 miles closer to home
Answer:

The statement that best represents the meaning of the term 60h is:

           C. the number of miles Dee drove in h hours

Step-by-step explanation:

The expression 705 – 60h gives the number of miles Dee is from home after driving h hours.

This means that initially he is: 705 miles away from the home.

Now, he is travelling at a speed of 60 miles per hour.

This means that the distance he travels in h hours is: 60h miles.

          Hence, the correct answer is: Option: C

Convert the mixed number to an improper fraction. Enter your answer below, using the slash mark ( / ) as the fraction bar.

3 7/8

Answer:

Answers

Multiply the whole number by the denominator so 3x8=24 and then add the numerator so 24+7=31.
31 will be your new numerator over 8. Therefore the improper fraction will be 31/8.
Do 3 times 8 = 24
Add 7 = 31
Keep denominator

= 31/8 (improper fraction)

An elephant can run 1/4 of a mile in 36 seconds. At this rate, which expression can be used to determine how fast an elephant runs in miles per hour?

Answers

[tex] \frac{0.25~mile}{36~s} \times \dfrac{60~s}{1~min} \times \dfrac{60~min}{1~hr} = 25 ~miles/hour[/tex]

Answer: 25 miles per hour

Step-by-step explanation: Since elephant run 1/4 miles in 36 sec

that means in 1 sec elephant runs 1/(4×36) miles

and 1 hour=60×60 sec

that means in 1 hour elephant runs (60×60)/(4×36) miles=25 miles

i.e. elephant runs 25 miles per hour

Shawn read 3/4 of a chapter of his history book in 1/6 of an hour at this rate how many chapters of his history book can he read in 1 hour explain

Answers

one-sixth of an hour is 10 minute
10 minutes 3/4 chapter
 Therefore, 10 minutes x 6= 3/4x6
Shawn can read 4.5 chapters in one hour

How far apart in miles are two towns that are 3.25 inches apart on map?

Answers

so for every .25 in it is 20 miles

3.25 is 13 x .25, so 13 is your answer for the next equation.

Now multiply 13 to 20

13 x 20 = 260

260 miles is your answer

hope this helps :D

Answer:

so for every .25 in it is 20 miles

3.25 is 13 x .25, so 13 is your answer for the next equation.

Now multiply 13 to 20

13 x 20 = 260

260 miles is your answer

Step-by-step explanation:

Inequality solution wuestions

Answers

There are 10 questions in the attached image. I cannot solve 10 questions for you in one. I suggest that you submit the questions one by one if you really need each one solved.

Here I solve in detail two of the questions and explain the solution. With this explanation you should be able to understatnd how to answer all the questions.

13) a - 6 ≤ 15 + 8a

=> a - a - 6 - 15 ≤ 15 - 15 + 8a - a

-21 ≤ 7a

7a ≥ - 21

a ≥ - 21/7

a ≥ - 3

So, the solutions are all the number on the real line equal or greater than - 3.

14) 13 + 2v - 8 + 6 > - 7 - v

=> 13 - 13 + 2v + v - 8 + 8 + 6 - 6 > - 7 - 13 + 8 - 6 - v + v

=> 3v > - 18

=> 3v > -18 / 3

=> v > - 6

Therefore, the solutions on the real line are all the real numbers greater than - 6.

Convert 5 over 8 to a decimal and tell whether it terminates or repeats.
A. 5.8, a number that terminates
B. 5.8 with a repeating bar over 8, a number that repeats
C. 0.625 with a repeating bar over 625, a number that repeats
D. 0.625, a number that terminates

Answers

D.. the number terminates.

Answer:

D because 5 over 8 is 0.625 when as a decimal and that means that the number terminates because the number does not repeat

Step-by-step explanation:

hopefully i am right and i do not want brainiest give it to the other guy

What is the discrimination of 3x^2+6x=2

Answers

60
D>0, there are 2 distinct real roots

Explanation:

3x2+6x−2=0
a=3,b=6,c=−2

The formula for discriminant is b2−4acSubstitute the given values.

b2−4ac
(6)2−4(3)(−2)
=60
therefore, D>0, there are 2 distinct real roots

Discriminant, not discrimination.  I'm not discriminating against you.  ;)

You must re-write   3x^2+6x=2    in standard form:     3x^2 + 6x - 2 

Here a=3, b=6 and c= -2

The discriminant is b^2 - 4ac.  Here, it's     6^2 - 4(3)(-2), or 36 + 24, or 60.

This quadratic has two real, unequal, zeros.

What is 2x + 3y = 1,470 in slope-intercept form? Show your work, please!!

Answers

slope intercept is y = mx + b

b is 1470


2x + 3y = 1470

2x (-2x) +3y = 1470 - 2x

3y = -2x + 1470

3y/3 = (-2x + 1470)/3

y = -2/3x + 490


hope this helps

Louise bought 114 pounds of roast beef at $2.00 per pound and ​ 212 ​pounds of turkey at $1.50 per pound. What was her total cost? Enter your answer in the box. $

Answers

Answer: Hello there!

Louse bought 114 pounds of roast beef at $2.00 per pound, this means that each one of the 114 pounds cost $2, then the total cost of the roast beef is $2*114 = $228.

For the turkey she bought 212 pounds at a price of $1.50 per pound, with the same reasoning as before, we need to see $1.50*212 = $318

then she spend $228 in roast beef and $318 in turkey, then the total cost is the addition of this two: $228 + $318 = $546.

The inverse of a function is a function.

1.) Always

2.)Sometimes

3.) Never

Answers

Sometimes it is, i think that should help.
2)sometimes is answer

Round this number to the nearest 100,000. 7,524,865

Answers

Look at the hundred-thousands place.
It is the 6th place left of the decimal point and has a 5 in it.
All digits to the right of the 5 will become zero.
If the first digit to the right of the 5 is 5 through 9, the 5 goes up 1 to 6.
In this case, the first digit to the right of 5 is a 2, so the 5 remains as 5.
Answer: 7,500,000

4.5+(2×2.5)^2-6=? show work please

Answers

I just did the answer

Try using P.E.M.D.A.S,it will make the problem much easier:(make sure you do each step in order.)

P:Parenthesis,solve the equation in the parenthesis first.

E:Exponants,solve the exponants,if they're are none,you can skip this step.

M:Multiplication,Multiply any numbers that need to be multiplied.

D:Division,divide,if there is nothing to divide,you may skip this step.

A:Addition,add and solve for a sum.

S:Subtraction,subtract any numbers that need to be subtracdted.

    If this did not help or seemed confusing,i strongly suggest you look it up on the internet or ask your teacher about P.E.M.D.A.S,it makes problems much easier to solve. :)






































































































A farmer grows two types of grain in his fields. He has a seed budget of $18,000.00 and has spent $8,100.00 to plant wheat seed so far. If barley seed costs $47.00 per acre to plant, what is the maximum number of acres of barley the farmer can plant and still be under budget?

Answers

$18,000.00-$8,100.00=$9,900
9,900/47=210.6
210×47= 9,870
$30 under budget
210 max acres

Answer: There is 211 number of acres of barley the farmer can plant and still be under budget.

hgfhfhfghfgh

Step-by-step explanation:

Since we have given that

Amount of budget = $18000

Expenses he spent to plant wheat = $8100

So, Total amount for acre is given by

[tex]\$18000-\$8100\\\\=\$9900[/tex]

Cost of each acre to plant = $47.00

So, the maximum number of acres of barley is given by

[tex]\dfrac{9900}{47}\\\\=210.63\\\\=211\ acres[/tex]

Hence, there is 211 number of acres of barley the farmer can plant and still be under budget.

Henry has a bag containing 35 letter tiles some consonants and some vowels He selects a tile without looking and then replaces it if he pull 3 consonants tiles and 4 vowel tiles which is the most likely number of consonant tile in Henry’s bag

Answers

So Henry pulled out a total of 7 tiles (3 consonant tiles and 4 vowel times). You take that 7 and divide the total number of tiles, 35 by it.

35/7

=5

This gives you 5

You then take that 5 and multiply it by the amount of consonant vowels he pulled out, which is 3.

5x3

=15

So your answer is...

D.) 15 Tiles

I hope this helped! : )

When are two numbers

opposites

Answers

Hey there!

So 2 numbers are opposite if they have the same absolute value but different signs

Ex: -3 and 3 are opposites of each other

Hope this helps!

Helpppp now please helpppp

Answers

The correct answer is:  [B]:  " [tex] \frac{(-3)(4)}{(6)} [/tex] " . 
__________________________________________________________
Consider choice [A]:  [tex] \frac{(3)(4)}{(6)} [/tex] ; 
                              = [tex] \frac{12}{6}[/tex] ; 
                              = 2 ;  "2 ≠ -2" ; so we can rule out:  "Choice [A]" .
__________________________________________________________
Consider choice [B]:  [tex] \frac{(-3)(4)}{(6)} [/tex] ; 
                              = [tex] \frac{-12}{6}[/tex] ; 
                              =  "-2" ;  Yes!
→ Let us proceed with the final answer choice ;
__________________________________________________________
Consider choice [C]:  [tex] \frac{(-3)(-4)}{(6)} [/tex] ; 
                              = [tex] \frac{12}{6}[/tex] ; 
                              = 2 ;  "2 ≠ -2" ; so we can rule out:  "Choice [C]" .
__________________________________________________________
The correct answer is:  [B]:  " [tex] \frac{(-3)(4)}{(6)} [/tex] "  .
__________________________________________________________

B. I did my math

Using google

How is a relationship determined when looking at a scatterplot

Answers

Answer:

Scatter plots show how much one variable is affected by another. The relationship between two variables is called their correlation . ... If the line goes from a high-value on the y-axis down to a high-value on the x-axis, the variables have a negative correlation . A perfect positive correlation is given the value of 1.

Which expression has the same value as 7÷9 over 10

A . 7×10/9
B. 1/7x9/10
C. 7x9/10
D. 1/7x10/9

Answers

This may be wrong but I'm going to go with B. 1/7 x 9/10



Hope this helps! ( Probably didn't help in any way but I tried).

Answer:

b is right

Step-by-step explanation:

write a second inequality withe the same meaning -20 <- s

Answers

s < 20 , -5x > -100 , etc

Alton had $18.00 to spend on paints, which sold for $1.14 each. How many jars of paint can he buy?

Answers

divide the money he has to spend by the price per jar

18 / 1.14 = 15.79

since he can't buy 0.79 of a jar round your answer down, he can  buy 15 jars

the answer would be 15 jars 

Ben is going on a 140- mile trip. If he drives for 2 hours at an average speed of 50 miles per hour,how many miles will he still have left to go on his trip?

Answers

Distance = Speed x time
Speed = Distance / time
Time= Distance/Speed
Time= 2hrs
Speed= 50 miles/Hour
Distance = 50 x 2 =100miles
140 - 100= 40

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