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
faust18 [17]
2 years ago
8

What is the x-value in the solution to this system of linear equations?

Mathematics
1 answer:
ASHA 777 [7]2 years ago
8 0

Answer:

  4

Step-by-step explanation:

The y-variable can be eliminated by adding 3 times the first equation to the second:

  3(2x -y) +(x +3y) = 3(11) +(-5)

  7x = 28 . . . .  simplify

  x = 4 . . . . . . . divide by 7

_____

Using Cramer's Rule, you can also find the x-value. The math is not so different.

  x = ((-1)(-5) -(3)(11))/(-1(1) -3(2)) = -28/-7 = 4

You might be interested in
Can you guys tell me which ones are independent varibles or dependent varibles
Mrrafil [7]

the x s are the independent variable so any direct change to them is changing the independent.  like the second one has -5 on the x

8 0
3 years ago
Identify the factors of x2-8x-20
sukhopar [10]
Simplifying x2 + -8x = 20 Reorder the terms: -8x + x2 = 20 Solving -8x + x2 = 20 Solving for variable 'x'. Reorder the terms: -20 + -8x + x2 = 20 + -20 Combine like terms: 20 + -20 = 0 -20 + -8x + x2 = 0 Factor a trinomial. (-2 + -1x)(10 + -1x) = 0 Subproblem 1Set the factor '(-2 + -1x)' equal to zero and attempt to solve: Simplifying -2 + -1x = 0 Solving -2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1x = 0 + 2 -1x = 0 + 2 Combine like terms: 0 + 2 = 2 -1x = 2 Divide each side by '-1'. x = -2 Simplifying x = -2 Subproblem 2Set the factor '(10 + -1x)' equal to zero and attempt to solve: Simplifying 10 + -1x = 0 Solving 10 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + -1x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + -1x = 0 + -10 -1x = 0 + -10 Combine like terms: 0 + -10 = -10 -1x = -10 Divide each side by '-1'. x = 10 Simplifying x = 10Solutionx = {-2, 10}
6 0
3 years ago
Read 2 more answers
An object that starts at rest accelerates until it is moving at 247 km/h. If it takes 1.7 minutes for this change to occur what
fredd [130]

I figured out the answer Chaseashley24! The answer to your question is:

0.673 m/s²

Hope this helps!

6 0
3 years ago
The line with slope -1/4 and passing through (1,2)
Deffense [45]

Answer:

the correct answer is Y=-x-3

8 0
3 years ago
What are the x-int of the parabola graphed
Vaselesa [24]

Answer:

Step-by-step explanation:

The x-intercepts exist where y is equal to 0...which is ON the x-axis. Hence, the name "x-intercept". These are caled zeros, solutions, and roots. This parabola goes through the x-axis at x = 0 and x = 4. It is at both of these locations where the y-coordinate is 0.

5 0
2 years ago
Read 2 more answers
Other questions:
  • Math help <br> is it D? <br> please and thank you
    5·2 answers
  • Which number should each side of the equation 2/3x= 10 be multiplied by to produce the equivalent equation of x= 15
    5·2 answers
  • Sophia bought enough birdseed to fill in a gallon container if she feeds her birds one cup of food each day how many days will t
    7·2 answers
  • PLEASE HELP!!!!!!!!!!!!!!
    7·1 answer
  • Find the value of x.
    13·2 answers
  • I NEED HELP PLEASE I WILL GIVE CROWN :))
    10·1 answer
  • A necklace is regularly sold for $18.00. The sore advertises a
    13·1 answer
  • Consider the complex number z = 27i. What are the characteristics of the cube roots of z?
    7·2 answers
  • Which of the following terms correctly describe the object below?
    12·1 answer
  • What is the answer plssssss
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!