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
tino4ka555 [31]
3 years ago
12

-3x -4y = 20 x - 10y =16 if (x, y) is the solution to the system of equations above what is the value of x?

Mathematics
1 answer:
balu736 [363]3 years ago
6 0
Multiply first equation by -5 and 2nd by 2, add them

15x+20y=-100
<u>2x-20y=32 +</u>
17x+0y=-68

17x=-68
divide both sides by 17
x=-4
 

the x value is -4
You might be interested in
Help please! ill mark brainliest!
Natasha_Volkova [10]

Answer:

0.225989

Step-by-step explanation:

3x+9+x-11=180

4x-3=180

4x=180-3

4x/4x=177/4x

0.225989

7 0
3 years ago
Read 2 more answers
Need help understanding what to do
Juliette [100K]
I believe you are expected to simplify. To do this all you do is group like terms (x, x², x³ etc.) and then simplify the coefficients. 

13. 10z + 7z - 19z² - 5z² - 17z 

first you can rearrange and group like terms (remember the bring the sign in front of each term with it). I would do it like this: 
-19z² - 5z² +10z + 7z - 17z

Now simplify the coefficients: 

-24z² + 0z 

you can omit the 0z and your simplified answer is 

-24z²

Main thing to remember here is that z and z² cannot be simplified together, nor can any variable that has an exponent because the exponent makes them differ. 

6 0
2 years ago
You ride your bike 1 3 10 mi to school. At the end of the day, you stop at a park on the way home. The park is 2 5 mi from schoo
adelina 88 [10]

Answer:

124

Step-by-step explanation:

wood

8 0
2 years ago
Proportional to 45⁄3?
loris [4]
<span>Proportional to 45⁄3 
= 15/1 or 30/2

hope it helps</span>
8 0
3 years ago
Solve 10n^2+4n+15n+6​
Allushta [10]

Answer:

Step-by-step explanation:

10n^2 +4n+15n+6 [Add the like terms]

10n^2 +19n +6

Hope this helps!

Mark brainliest if you think i helped! Would really appreciate!

4 0
3 years ago
Other questions:
  • Help asap mark you BRAINLY 5 star <br><br><br> and heart tysm!
    8·2 answers
  • What is the answer the this question??????
    8·1 answer
  • Dentify the transformation that carries the figure onto itself.
    7·2 answers
  • Find least common multiple of 12, 2, and 4.
    15·1 answer
  • .............................
    6·1 answer
  • Which one A or B or C help pls!
    7·2 answers
  • Sergei runs a bakery
    11·2 answers
  • What is the area of the trapozoid? pls help :)
    10·1 answer
  • F(x) = -x + 5<br> g(x) = x2 – x +4<br> Find: (f•g)(x)
    7·1 answer
  • Are the expressions 8a - 3b - (2a + 4b) and 6a + b equivalent?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!