A student took a system of equations, multiplied the first equation by 2 and the second equation by 3, then added the results together. Based on this, she concluded that there were no solutions. Which system of equations could she have started with?

1) 2x-4y=6
3x+6y=9

2) 3x+y=12
-3x+6y=6

3) -2x+4y=4
-3x+6y=6

4) 3x+6y=9
-2x-4y=4

Answers

Answer 1

Answer:

system 4.

Step-by-step explanation:

3x+6y=9

multiply by 2

6x+12y=18   ....(1)

-2x+-4y=4

multiply by 3

-6x-12y=12   ...(2)

add (1) and (2)

0+0=30

which is impossible .It has no solutions.

Answer 2

Answer:4) 3x+6y=9-2x-4y=4

Step-by-step explanation:

I got the answer right


Related Questions

Hi can someone explain to me this question or help thank you

Answers

Answer:

1. 5x = 10

5x-1 = 9

2. 5x = 50

5x-1 = 49

3. 5x = 60

5x-1 = 59

4. x = 5

5x-1 = 24

5. x = 7

5x = 35

6. x = 20

5x = 100

Step-by-step explanation:

substitution x in each one

for example

x = 2

5x = 5×2 (×2 because x = 2)

so, 5x = 10

about question number 4

5x=25

x = 25÷5 (change side change mark)

x = 5

questions that I don't show you how to think

let's get it by yourself

change side change mark. it's mean

if in equation is plus change to minus

if in equation is minus change to plus

if in equation is divided by change to multiply

if in equation is multiply change to divide by

hope it helps you ☺️

Answer:

You need to look at the value of x which is already given and insert it into the other values

Step-by-step explanation:

fore example

                                        if x=2                  

then        5x                                       5x-1

              5(2)                                     5(2)-1

            = 10                                       10-1

                                                          =9                                                          

(you put the value of x where x is supposed to be, since x was 2 I replace it with 2 and got the answer).

where we have value of 5x which is 25 we will substitute to get value of x.

5x= 25

x= 25/5

x= 5

Now we have the value of x

Where we have the last value we will substitute it like

5x-1= 34

5x= 34+1

5x= 35

x= 35/5

x= 7

Now we have value of x

What does |-71 equal?

Answers

Answer: 71

Step-by-step explanation:

Write an equation for the line having a slope of -1/3 and y-intercept is 5

Answers

Answer:

y= -1/3x +5

Step-by-step explanation:

Using the equation y=mx+b

you know m (slope), which is -1/3

you also know your b which is 5

You get y= -1/3x+5

What is 1/3 as a decimal? Give your answer rounded to 2 decimal places.

Answers

Answer:

Answer vary:

1/3 into a decimal = 0.3

Step-by-step explanation:

honestly in my opinion that my answer.

all you do to find it out is divide 1 to 3, so it’s pretty simple. and the dash between 1 and 3 in fractions means divide so yea that’s all you need to do.

Pls can anyone help il give more points plsss

Answers

Answer:

1. 25

2. 3 hours

3. from 10:00 am to 10:30 am because he went 10 miles in 30 minutes

Step-by-step explanation:

hgarage hhhhhjjjhjjjjjjhhhhhhh​

Answers

felt

kajskskwowwjsksj

it is a kid ok there bye bye

On a bicycle, Eddie can travel 20 miles in 4 hours. How many hours does it take Eddie to travel 1 mile?

Answers

Answer:

1 mile = 0.2 hours

Step-by-step explanation:

Given that,

Eddie can travel 20 miles in 4 hours.

We need to find how many hours does it take Eddie to travel 1 mile.

20 mile = 4 hours

1 mile = (4/20) hours

= 0.2 hours

So, to travel 1 mile will take 0.2 hours.

Which ordered pair is on the graph of the function?




(3, -7)

(5, 10)

(2, 1)

(4, 2)

Answers

Answer:

(5,10)

Step-by-step explanation:

(3,-7) is nowhere near the line

(2,1) you can find and see it isn't on the line

(4,2) you can find and see it isn't on the line

The only ordered pair left is (5,10)

Hope this helps. Have a great day!

:)

Please answer these 2 word problems for BRAINLIEST AND IF CORRECT I WILL GIVE EXTRA POINTS

Answers

Answer:

150

Step-by-step explanation:

what must you do with an inequality symbol if you divide or multiply both sides by a negative number?

Answers

When you multiply or divide both sides of an inequality by a negative, you must switch the direction of the inequality sign. Please give this idea of your full attention. Even the most advanced algebra students will sometimes forget to switch the direction of the inequality sign when multiplying or dividing both sides of an inequality by a negative.

Find the distance between the two points rounding to the nearest tenth (8,−9) and (2,−7)

Answers

Answer:

negative 7 is first then comes 2.  negative 9 is first then comes 8.

Step-by-step explanation:

Answer:

6.3

Step-by-step explanation:

-9xy + 9x -17xy + 9y PLS HELP

Answers

Answer:

-8xy

Step-by-step explanation:

Answer:

−26xy+9x+9y

Step-by-step explanation:

Let's simplify step-by-step.

(−9x)(y)+9x−17xy+9y

=−9xy+9x+−17xy+9y

Combine Like Terms:

=−9xy+9x+−17xy+9y

=(−9xy+−17xy)+(9x)+(9y)

=−26xy+9x+9y

Use the algorithm of inverse operation/reciprocal (KCF) to find answers 1 2/7 divided 1/2

Answers

Answer:

2 4/7

Step-by-step explanation:

convert 1 2/7 into 9/7then use KCF to change it to 9/7 x 2/1multiply 9 * 2 which is 18multiply 7 * 1 which is 7then change it back to a mixed fractionto get 2 4/7

mayroong 10 abokado sa bawat basket.kung mayroong 8 basket,ilan lahat ang abokado?

Answers

Waaaaaaaaaaaat????????

John wants to predict the frequency of rolling a 4 or 5 using a 6-sided dice with numbers one through six. Which of the following is the closest to the prediction if the number cube was rolled 600 times?

A. About 200 times
B. about 120 times
C. about 100 times
D. about 16 times

Answers

Answer:

C

Step-by-step explanation:

Can Someone Help Me? Give Out Point!

Answers

Answer: it’s 4:5

Step-by-step explanation:

5.9
there are 15 blueberry muffins and 27 muffins in total. 15 divided by 3 is 5 and 27 divided by 3 is 9. therefore, the answer is 5.9

kate buys 10 ticket to show. She also pays a 5$ parking fee. she spent $35 to see the show. What equation is this

Answers

Answer:

35 = 5 + 10x

Step-by-step explanation:

x = the ticket price.

Each ticket was $3

hope this helps :)

(35 - 5)/10 = 3 because She paid 35 all together + 5$ was for parking, we can subtract that. Then 30/10 is equal to 3 so she spent 3 dollars for each ticket

(I will mark brainliest) Use this equation to solve for the missing variable:

y = 8x + 12


If x = -6, y = _____

If y = 13, x = _____

Answers

Answer: x would be 1/8 and y would be -36

Step-by-step explanation:

To find put y you would plug in -6 for x. So it would be y=8(-6)+12. Then you multiply the 8 and -6 to get -48, y=-48+12. Then subtract 48 from 12 and that is -36 so y=-36. To solve for x you would plug in the y or 13 into the equation. So, 13=8x+12. Then you would have to solve. 12 minus 13 is 1 and the you are left with 1=8x then you divide 1/8 and 8x/8 and you get x=1/8. Hope this helped!

Use the following figure to answer the question.
1
2
If _1 and 2 are equal, then lines /and mare parallel.
True
False

Answers

Answer:

true

Step-by-step explanation:

because angle 1 and 2 can only be equal if the lines are parallel

Please need help with one

Answers

The answer is 88 cube units.

Andre is planting saplings (baby trees). It takes him 30 minutes to plant 3 saplings. If each sapling takes the same amount of time to plant, how long will it take Andre to plant 14 saplings? If you get stuck, consider using the table.

Answers

Answer:

140 minutes

Step-by-step explanation:

If it takes him 30 mins to plant three, then 30 divided into three equal groups is 10. Then we multiply 14 and 10 together since it takes Andre ten minutes to plant each sapling. This means  that the 14 saplings takes ten minutes EACH to plant.

Answer: 140

Step-by-step explanation:

i got it right

Let m and n be non-zero rational numbers, and x and y be irrational numbers,

Consider the operations below and select all answers that will make each

statement true.

Answers

Answer:

(a) Irrational

(b) Irrational

Step-by-step explanation:

Given (Missing Operations):

[tex]m * x[/tex]

[tex]n * y[/tex]

The options are:

Rational             Irrational

(a) [tex]m * x[/tex]

m is a rational number while x is an irrational number.

And we know that:

[tex]rational * irrational = irrational[/tex]

Hence:

[tex]m * x = Irrational[/tex]

(b) [tex]n * y[/tex]

n is a rational number while y is an irrational number.

And we know that:

[tex]rational * irrational = irrational[/tex]

Hence:

[tex]n * y = Irrational[/tex]

What is 48.6% of 19?
Please

Answers

The correct answer would be 9.234

Find a description this equation represents. Of the numbers 1, 2, 3, 4, and 5, which are solutions to the equation? 3x-7=5

Answers

Answer:

x=4

Step-by-step explanation:

Write the number that is five less than ten million.

Answers

Answer:

9,999,995

Step-by-step explanation:

3. How many kilograms are equal to
5,000 grams?

A 500 kilograms
B 50 kilograms
C 5 kilograms
D 0.5 kilogram

Answers

Answer:

C.) 5 kilograms

Step-by-step explanation:

1000 grams = 1 kilogram

To convert grams to kilograms we divide by 1000

5000g divided by 1000 kg = 5kg

May I Please Have Brainliest I'm trying to achieve a new rank

5,000 grams is equal to 5,000/1000 = 5 kilograms. The correct option is C

What is kilograms ?

A unit of measurement used to describe mass or weight is the kilogram (kg). It is widely used all over the world to measure an object's weight because it is the International System of Units' (SI) fundamental unit of mass.

To convert grams to kilograms, you divide the number of grams by 1000 since there are 1000 grams in one kilogram.

So, 5,000 grams is equal to 5,000/1000 = 5 kilograms.

Therefore, the correct option is C. 5 kilograms.

Learn more about kilograms here : brainly.com/question/29255021

#SPJ6

I need help quick this is hard

Answers

12inches including the history bonus make sure to include the politics

PLEASE HELP

3 dozens = _______ units

Answers

36 units
Hope this helps u hon :)

Answer:

36 unit

Step-by-step explanation:

1 dozen= 12 units

3 dozen = 12 × 3 = 36 units

Choose all of the statements that are true about AABC.

Answers

^ what they said the answer is c and d

What is 4.08 divided by 2?

Answers

Answer:

2.04

Step-by-step explanation:

basically you want to do

4.08

     2

       

2.04

just divide 8 by 2 which equals 4 and then 0 divided by 2 isnt anything so you do 4 divided by 2 equals 2.

hope this helps!!

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