1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
scZoUnD [109]
3 years ago
13

How do you solve the system of equations 4 x − 2 y = 1 and -4 + 4 y = -2

Mathematics
1 answer:
Dmitrij [34]3 years ago
4 0

Answer: y= -2 - 1/2

Step-by-step explanation:

-4x -2y = 1

+4x       +4x

-2y = 4x + 1

/-2    /-2    /-2

y= -2 - 1/2

I think, i may be incorrect but the verbal explanation is; -4x is needed to be moved so you add 4x to both sides and 4x cancels out on the left which leaves -2y on the left (when it was moved "x" is always first). then divide all numbers by -2 to get y by itself. this gives you y= -2 - 1/2 if my calculations are correct.

You might be interested in
Fmfrjrjdjejeidisiiiidiidsisiiisi​
SVEN [57.7K]

Answer:

The answer is,

r =  \frac{3t}{t - 1}

Step-by-step explanation:

t =  \frac{r}{ r - 3}

Firstly, you have to get rid of fraction by multiplying (r-3) to both side and expand out:

t × (r-3) = r/(r-3) × (r-3)

rt - 3t = r

Then you have to move all the "r" variables to one side and other variables to the other side:

rt - r = 3t

You can make "r" as a subject by taking out the common term, you can see that the common term on the left is "r" so you can bring out:

r(t-1) = 3t

r = 3t/(t-1)

4 0
3 years ago
Simplify this equation<br> -5x+7&gt;22
Lana71 [14]

Answer:

<h2>x < - 3</h2>

Step-by-step explanation:

- 5x + 7 > 22

Move 7 to the other side of the inequality

- 5x > 22 - 7 \\  - 5x > 15

Divide both sides by - 5

\frac{ - 5x}{5}  >  -  \frac{15}{5}  \\ x >  - 3

Reverse the sign

We have the final answer as

<h3>x < - 3</h3>

Hope this helps you

4 0
2 years ago
If Victor were to put apples in bags so that there were 2 kg in each, then he would use 9 more bags than if he were to place 3 k
Cerrena [4.2K]
Let the number of bags that he would have been used to put 3 kg of apples be x. Thus the number of bags that would be used to put 2kgs will therefore be (x+9), hence the total number of kgs the bags will hold will be given by:
3*x=3x kgs
2(x+9)=(2x+18) kgs
since the total weights are the same then:
2x+18=3x
hence
18=3x-2x
18=x
thus the number of bags required to put 3 kgs of apples will be 18. Thus the total Kgs of apples was:
3x
=3*18
=54 kgs
8 0
3 years ago
Read 2 more answers
Is my solution correct?
nlexa [21]

Hello there!

Yes, your solution is correct! A way to check it is replacing the value you found for x into x in the equation.

3(2-x) = 7 - 4x ⇒ 3(2-1) = 7 - 4(1)

And now solve  3(2-1) = 7 - 4(1).

3(1) = 7 - 4(1)

3 = 7 - 4

3 = 3

Since it is a true statement that 3 is equal to 3, it means your solution of x = 1 is correct. Good job! :)

8 0
3 years ago
Read 2 more answers
PLEASE HELP ASAP
melomori [17]

Answer:

the point where the graph crosses the y-axis.

Step-by-step explanation:

I took the quiz and this was the correct answer

3 0
3 years ago
Other questions:
  • A national consumer magazine reported the following correlations. The correlation between car weight and car reliability is -0.8
    12·1 answer
  • For a recent project, a teacher purchased 250 pieces of red construction paper and 114 pieces of blue construction paper. What i
    6·1 answer
  • Which numbers are perfect squares? Check all that apply.<br> 0<br> 1<br> OOOOOO
    9·2 answers
  • 6, -18, 54, ...<br> what is the equation for the sequence <br><br> give the 14th term
    13·1 answer
  • Helpp plzzz? thank uuuu
    9·2 answers
  • Two points on a line L are (5,2) and (7,-4). what is the slope of L
    8·1 answer
  • What is the sum of r? - 3x + 7 and 3x2 + 5x - 9?
    5·1 answer
  • 63+6/3 -8 please help I need it rn
    12·2 answers
  • Please I really need help I’ll give brainliest
    13·1 answer
  • Solve by completing the square
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!