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
Dmitriy789 [7]
3 years ago
9

SOLVE y = 3x – 2 x – y = 4 BY USING SUBSTITUTION!! SHOW ALL WORK! HELPPP!

Mathematics
1 answer:
Setler79 [48]3 years ago
3 0

Answer:

(-1,-5)

Step-by-step explanation:

So we have the system:

y=3x-2

x-y=4.

We are asked to use substitution. Luckily, it is already setup for this because one of the equations has one of the variables solved for, namely the y=3x-2 equation.  We are going to insert y=3x-2 into x-y=4 and solve for x.

x-y=4  (with y=(3x-2) ):

x-(3x-2)=4

Distribute:

x-3x+2=4

Combine like terms:

-2x+2=4

Subtract 2 on both sides:

-2x    =2

Divide both sides by -2:

 x     =-1

Now if y=3x-2 and x=-1, then y=3(-1)-2=-3-2=-5.

So the solution is (-1,-5).

You might be interested in
Solve for x: x^2-2x=15
Lyrx [107]

Answer:

<h2>x = 5 , x = -3</h2>

Step-by-step explanation:

x^2 - 2x = 15

x^2 - 2x - 15 = 15 - 15          (Subtract 15 from both sides.)

x^2 - 2x -15 = 0                   (Simplify.)

<em />

<em>Set up & solve for a quadratic formula</em>

<h3><em>* I will solve for your first x</em></h3>

2 + root 64 / 2x 1   =   2 + root 64 / 2

root 64 = 8

= 2 + 8 / 2

= 10 / 2

= 5

<em>To solve for the second, follow the same pattern/formula for the first that I used to get 5.</em>

5 0
3 years ago
Please helppppp me i need it
valentinak56 [21]
Hey there!

Given rule is 2x-8

Given x = 8

On substituting ,

=> 2(8)-8

=> 16-8

=> 8

8 is the answer mate!

Hope it helps you

Please mark as brainliest.
5 0
3 years ago
Use the graph to answer the question. Between which consecutive years was the increase in the price of oil per barrel greatest?
NARA [144]
D. 2007- 2008:) i think
8 0
3 years ago
Read 2 more answers
Pls help will give brainliest to best answer
NNADVOKAT [17]

Answer:

y=250x-4

Step-by-step explanation:

If y represents the amount of money made in a week, y=250.

If x represents the amount of cakes that are made, x=?

You make $250(y) a week, you then spend $4(x) per cake, this would make the equation:

y=250x-4

3 0
3 years ago
suppose the population of a certain city is 5355 thousand. It is expected to decrease to 4566 thousand in 50 years. Find the per
xz_007 [3.2K]

Answer: 14.7338936% decrease

\frac{5355}{100} = \frac{4566}{x}

cross-multiply

85.2661064 = x

100 - 85.2661064 = 14.7338936

Check: 0.852661064 * 5355 = 4566

If permitted, you may round for a simpler (yet less precise and exact) answer.  For instance, rounding to the hundredths would make it ~14.73%.

5 0
3 years ago
Other questions:
  • Shun is going to flip a fair coin 450 times. Complete the following statement with the best prediction the coin will land talls
    10·1 answer
  • F(x) = x^2 -­ 16 and g(x) = x+4. Find f/g and its domain
    10·1 answer
  • Plane A leaves Tulsa at 2:00 p.m., averaging 300 mph and flying in a northerly direction. Plane B leaves Tulsa at 2:30 p.m., ave
    9·2 answers
  • Elsa, joe, and carlos sent a total of 143 text messages over their cell phones during the weekend. Carlos sent 5 fewer messages
    7·1 answer
  • Select the correct answer.<br>What is the solution of 3x + y = 9 and 3x - 5y = 15​
    7·1 answer
  • What is the perimeter of triangle ABC ?
    11·2 answers
  • Someone please help me??
    10·1 answer
  • (3)/(2x+3)=(2)/(10x+4) Solve the proportion.
    9·1 answer
  • What expression is equivalent to 36a-27
    10·1 answer
  • I WILL GIVE BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!