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
Ahat [919]
3 years ago
14

I'm confused on how to go about solving this, I got to this part:

Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
6 0

Answer:

  • (3, -4, 6)

Step-by-step explanation:

The last equation has 2 variables

If we double the first equation and subtract the second one from it, we get rid of y and then comparing the new equation with the last one we can easily solve it

<u>Step 1</u>

  • 2(2x + y + 3z) = 2*20
  • 4x + 2y + 6z = 40

<u>Step 2</u>

  • 4x - x + 2y - 2y + 6z - (-z) = 40 - (-11)
  • 3x + 7z = 51

<u>Step 3</u>

  • 3x + 7z - (3x - 2z) = 51 - (-3)
  • 7z + 2z = 54
  • 9z = 54
  • z = 6

<u>Then finding x</u>

  • 3x - 2*6 = -3
  • 3x = 12 - 3
  • 3x = 9
  • x = 3

<u>Then finding y using the first equation</u>

  • 2*3 + y + 3*6 = 20
  • y + 24 = 20
  • y = -4

<u>The answer:</u>

  • (3, -4, 6)
You might be interested in
Select the statements that are true about the graph.
torisob [31]

Answer:It's called the "y intercept" and it's the y value of the point where the line intersects the y- axis. For this line, the y-intercept is "negative 1." You can find the y-intercept by looking at the graph and seeing which point crosses the y axis. This point will always have an x coordinate of zero.

Step-by-step explanation:

The Y intercept of a straight line is simply where the line crosses the Y axis.

Example

Y intercept

In the above diagram the line crosses the Y axis at 1.

The Y intercept is equal to 1 and the point is written as (0,1). Notice that for the y-intercept the x-coordinate of the point is always zero..

8 0
3 years ago
Claire said that 10/15 of her CDs are country music. Which statement could be true based upon this relationship?
never [62]

Answer:

C. Claire has 10 country CDs and 5 Jazz CDs

Step-by-step explanation:

\dfrac{10}{15} means that 10 out of 15. So we can assume that in total she has 15 CDs and 10 of them are Country and the other is Jazz.

This would rule out choice D.

If we reduce this fraction then we would have:

\dfrac{10}{15} = \dfrac{2}{3}

This means that two-thirds of her CDs are country music. So this would rule out A and B choices.

Now C is correct because 10 country plus 5 Jazz is equal to 15 CDs. So we have the correct total.

The answer is C.

7 0
3 years ago
Read 2 more answers
URGENT NEED HELP
Sergeeva-Olga [200]
5/50 or 1/10 in winning a prize.
8 0
3 years ago
Read 2 more answers
Can someone help me please id really appreciate it , i’ll give you brainliest
ozzi

Answer:

Alternate Exterior Angles Theorem

Step-by-step explanation:

By looking, we can see that they are exterior angles. Because 2 parallel lines are cut by a transversal, the angles are congruent.

4 0
3 years ago
Ashley and her two sisters decide to split the cost of a new DVD player for their playroom. the DVD player cost $57 after tax. B
Shkiper50 [21]
$19 dollars from each sisters bank account
6 0
3 years ago
Other questions:
  • Math help please will give brainliest 30 points!!
    13·2 answers
  • Need help with finding the kg
    14·1 answer
  • Simplify.<br><br> 13x+4−8+6x−13x−4
    10·2 answers
  • What is the value of the expression? –13.7+(–5+2.7)
    11·2 answers
  • Which inequalities are true? Check all that apply. 0&lt;8 8&lt;3 8&gt;7 8&lt;2 8&gt;8 1&lt;8
    6·1 answer
  • Help me with this geometry questions please (Radom questions will be reported)
    5·1 answer
  • A right triangle has a hypotenuse that is 15 inches long and one leg that 9 inches long what is the perimeter of the triangle
    8·1 answer
  • Help me pls none of this makes sense:(
    15·2 answers
  • If 445 to base n is equal to 173,find the value of n​
    8·1 answer
  • 14 is 40% of ___? <br> Or what is 14 40% of
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!