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
Mani,James, and Isidro shared 1/2 of a pie. Which fraction of the whole pie did each of them receive?
bija089 [108]

Answer:

1/6

Step-by-step explanation:

\frac{1}{2}/3= 1/6

3 0
3 years ago
WhT is the relationship between the 6s in the number 660,472
AveGali [126]
There next to each other
4 0
3 years ago
When the function y = 2^{x} is changed to y = 2(2^{x}), the graph is shifted one unit. What is the direction of the shift?
KIM [24]
Upwards from 1 to 2 is your Answer (see attachments)

4 0
3 years ago
(PLEASE ANSWER!!) a college student completed some courses worth 4 credits and some courses worth 3 credits. the student earned
Ierofanga [76]

The college student took 13 courses of 3 credit hours.

Step-by-step explanation:

Given,

Total credits = 59

Total courses = 18

Let,

Number of 3 credit hour courses = x

Number of 4 credit hour courses = y

According to given statement;

x+y=18     Eqn 1

3x+4y=59   Eqn 2

We will eliminate y to find the number of 3 credit hour courses, therefore,

Multiplying Eqn 1 by 4

4(x+y=18)\\4x+4y=72\ \ \ Eqn\ 3

Subtracting Eqn 2 from Eqn 3

(4x+4y)-(3x+4y)=72-59\\4x+4y-3x-4y=13\\x=13

The college student took 13 courses of 3 credit hours.

Keywords: linear equation, subtraction

Learn more about linear equations at:

  • brainly.com/question/10708697
  • brainly.com/question/10710410

#LearnwithBrainly

5 0
3 years ago
Line L1 is horizontal and passes through (1,1). Line L2 is vertical and passes through (2,2). Find the point of intersection of
Sedaia [141]
(2,1)
that's going to be your answer.
4 0
3 years ago
Other questions:
  • Is 23453 a perfect square if yes how?
    10·1 answer
  • Para calcular la altura alcanzada por un proyectil en la tierra es suficiente conocer la velocidad de lanzamiento
    14·1 answer
  • Solve 5x - (2x - 1) = 2, Answer is a decimal round to the hundredth (2 digits) or use / for fraction bar.
    6·1 answer
  • -2y + 2x = 10 for x please help
    12·2 answers
  • D. 350.00
    13·2 answers
  • Can someone help me with this question please! <br> 5-x=12
    6·2 answers
  • Help please??!?? i don’t understandddddd
    5·1 answer
  • Write the equation of a line perpendicular to y=2x-5y=2x−5 that passes through the point (2, -5).
    14·1 answer
  • No links and no false answers please help i'll mark you the brainlest
    8·1 answer
  • Can someone help me please?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!