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
Elis [28]
3 years ago
10

Add the equations. What value belongs in the green box? 3x + 2y = 9 -x - 2y = 4 [?] + [?] = [?] A. 4x B. 2x C. -3x D. -2x​

Mathematics
1 answer:
Naddika [18.5K]3 years ago
6 0

Consider the first blank is the green box.

Given:

The equations are

3x+2y=9

-x-2y=4

To find:

The value belongs in the green box

Solution:

We have,

3x+2y=9        ...(i)

-x-2y=4        ...(ii)

Adding (i) and (ii), we get

3x+2y-x-2y=9+4

(3x-x)+(2y-2y)=13

2x+0=13

So, the value for the first black is 2x. It means the value belongs in the green box is 2x.

The values of three blanks are 2x, 0 and 13 respectively.

Therefore, the correct option is B.

You might be interested in
What is the row echelon form of this matrix?
USPshnik [31]

The row echelon form of the matrix is presented as follows;

\begin{bmatrix}1 &-2  &-5  \\ 0& 1 &  -7\\ 0&0  &1  \\\end{bmatrix}

<h3>What is the row echelon form of a matrix?</h3>

The row echelon form of a matrix has the rows consisting entirely of zeros at the bottom, and the first entry of a row that is not entirely zero is a one.

The given matrix is presented as follows;

\begin{bmatrix}-3 &6  &15  \\ 2& -6 &  4\\ 1&0  &-1  \\\end{bmatrix}

The conditions of a matrix in the row echelon form are as follows;

  1. There are row having nonzero entries above the zero rows.
  2. The first nonzero entry in a nonzero row is a one.
  3. The location of the leading one in a nonzero row is to the left of the leading one in the next lower rows.

Dividing Row 1 by -3 gives:

\begin{bmatrix}1 &-2  &-5  \\ 2& -6 &  4\\ 1&0  &-1  \\\end{bmatrix}

Multiplying Row 1 by 2 and subtracting the result from Row 2 gives;

\begin{bmatrix}1 &-2  &-5  \\ 0& -2 &  14\\ 1&0  &-1  \\\end{bmatrix}

Subtracting Row 1 from Row 3 gives;

\begin{bmatrix}1 &-2  &-5  \\ 0& -2 &  14\\ 0&2  &4  \\\end{bmatrix}

Adding Row 2 to Row 3 gives;

\begin{bmatrix}1 &-2  &-5  \\ 0& -2 &  14\\ 0&0  &18  \\\end{bmatrix}

Dividing Row 2 by -2, and Row 3 by 18 gives;

\begin{bmatrix}1 &-2  &-5  \\ 0& 1 &  -7\\ 0&0  &1  \\\end{bmatrix}

The above matrix is in the row echelon form

Learn more about the row echelon form here:

brainly.com/question/14721322

#SPJ1

8 0
1 year ago
What is x+x+x+x+x+x+x+x+x+x+b+b+b+b+3=
xz_007 [3.2K]

Answer:

10x+4b+3

Step-by-step explanation:

x+x+x+x+x+x+x+x+x+x+b+b+b+b+3

There are 10 x

4 b

and one number

10x+4b+3

8 0
2 years ago
.
Tomtit [17]

Answer:

I dont know how to read hindi can u pls translate it into English

5 0
3 years ago
Read 2 more answers
Steven earns extra money babysitting. He charges $31.25 for 5 hours and $50 for 8 hours..
Maru [420]
$6.25 × h = c
h = hours, c = total cost

$31.25 for 5 hours. $6.25 per hour

$50 for 8 hours. $6.25 per hour
3 0
3 years ago
Tell whether the two figures are similar explain you reasoning
seropon [69]
What figures are you talking about, can you post the picture?
6 0
3 years ago
Other questions:
  • Find the percent of the number.<br> 20% of 60 is
    14·2 answers
  • Find the equation of a line that is parallel to y = 2x - 10 and passes through the point (3, -2). 
    13·1 answer
  • The measure of one of two complementary angles is 6 degrees less than one half the measure of the other. Find the measure of the
    5·1 answer
  • Select the correct answer.<br> Which of these is not a key feature of the function
    8·1 answer
  • I need help on this onee plizzzz
    11·2 answers
  • What is the answer?
    13·1 answer
  • Sally's pet grooming business charges $5 per cat and $10 per dog for a pet bath. She earned $550 for pet baths last month. If 20
    14·1 answer
  • If sin θ = square root of three over two, which could not be the value of θ?
    6·1 answer
  • AREA OF A CIRCLE HELP PLS​
    13·1 answer
  • Explain whether a triangle exists with side lengths 31 m, 89 m, and 122 m.​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!