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
KengaRu [80]
3 years ago
11

How to substitute equations for solutions 3x-2y=9 Y=2x-7

Mathematics
2 answers:
miss Akunina [59]3 years ago
7 0
First I would rewrite it so all the x's and y's are in the same places

3x-2y=9
-2x+y=-7

Then multiply the bottom one by 2
-4x+2y=-14

Then add the equations
   3x-2y=9
+-4x+2y=-14
-------------------
-x=-5 or x=5

The substitute this into one of the original equations to solve for y.

y=2(5)-7
y=3

So your answer is x=5 and y=3 or (5,3)

Hope this helps.

xxTIMURxx [149]3 years ago
5 0

3X-2(2X-7)=9

3X-4X+14=9

-X=-5

X=5

You might be interested in
Use a table of values to estimate the value of the limit. Confirm your result graphically by graphing the function with a graphi
il63 [147K]
Hello,

\lim_{x \to 0}\dfrac{ \sqrt{x+25}-5}{x}\\\\

=\lim_{x \to 0}\dfrac{(\sqrt{x+25}-5)*(\sqrt{x+25}+5)}{x*(\sqrt{x+25}+5)}\\\\

=\lim_{x \to 0}\dfrac{x+25-25)}{x*(\sqrt{x+25}+5)}\\\\


=\dfrac{1}{10}

















4 0
3 years ago
Help wanted and needed I’m not good at math
stealth61 [152]

Answer:

-  \frac{7}{8}

Step-by-step explanation:

Line d slope is 8/7, therefore the perpendicular is -7/8

8 0
3 years ago
How do you solve 0.25(3x-1)^2=13 for Graphing Parabolas in Vertex Form?
Oksanka [162]
Get the app Socratic and then take a pic, it will explain it better than anybody on here can
4 0
2 years ago
To increase an amount by 30%, what single multiplier would you use? and To decrease an amount by 30%, what single multiplier wou
Kamila [148]

Answer:

To increase, use 1.3

to decrease, use .7

Step-by-step explanation

6 0
3 years ago
Darwin borrows $3,000 at an
aksik [14]

Answer:

Interest = $600

Step-by-step explanation:

Interest = principal x rate as decimal x time

Interest = 3,000 x 0.04 x 5

Interest = 600

3 0
2 years ago
Other questions:
  • What is an expression with a negative exponent that has a value between 0 and 1/2
    15·1 answer
  • Rewrite 0.01 as a power of 10
    10·2 answers
  • Help please need it by 9/12/18 at 7:40 am please please please
    7·2 answers
  • What is the height of the platform?
    9·2 answers
  • What is the answer and steps to -3(5-9v)=25+7v
    5·2 answers
  • I just need a starter to help me on this. Thanks:)
    8·1 answer
  • Which ordered pair is not a solution of the equation y = 2x – 1
    5·2 answers
  • Paolo is using his grandmother's breakfast bar recipe. He always doubles
    5·1 answer
  • What is the range of the graphed function?
    14·1 answer
  • HELP ME PLEADE I NEED THIS ( PLATOOOOOO)
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!