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
LenKa [72]
3 years ago
12

There are 2 children in each row. How many children are in 5 rows?​

Mathematics
2 answers:
Katarina [22]3 years ago
4 0

Answer:

10

Step-by-step explanation:

2 children in each row * 5 rows = 10 children in total

Natasha2012 [34]3 years ago
3 0

Answer:

10

Step-by-step explanation:

You might be interested in
Of a classroom filled with 20 students, 2 will be selected to stay after school and correct homework for extra credit. How
Tcecarenko [31]

Answer: 10

Step-by-step explanation:

20/2=10

pairs of two

3 0
3 years ago
Read 2 more answers
Solve the given system of equations using either Gaussian or Gauss-Jordan elimination. (If there is no solution, enter NO SOLUTI
cricket20 [7]

Answer:

The system has infinitely many solutions

\begin{array}{ccc}x_1&=&-x_3\\x_2&=&-x_3\\x_3&=&arbitrary\end{array}

Step-by-step explanation:

Gauss–Jordan elimination is a method of solving a linear system of equations. This is done by transforming the system's augmented matrix into reduced row-echelon form by means of row operations.

An Augmented matrix, each row represents one equation in the system and each column represents a variable or the constant terms.

There are three elementary matrix row operations:

  1. Switch any two rows
  2. Multiply a row by a nonzero constant
  3. Add one row to another

To solve the following system

\begin{array}{ccccc}x_1&-3x_2&-2x_3&=&0\\-x_1&2x_2&x_3&=&0\\2x_1&+3x_2&+5x_3&=&0\end{array}

Step 1: Transform the augmented matrix to the reduced row echelon form

\left[ \begin{array}{cccc} 1 & -3 & -2 & 0 \\\\ -1 & 2 & 1 & 0 \\\\ 2 & 3 & 5 & 0 \end{array} \right]

This matrix can be transformed by a sequence of elementary row operations

Row Operation 1: add 1 times the 1st row to the 2nd row

Row Operation 2: add -2 times the 1st row to the 3rd row

Row Operation 3: multiply the 2nd row by -1

Row Operation 4: add -9 times the 2nd row to the 3rd row

Row Operation 5: add 3 times the 2nd row to the 1st row

to the matrix

\left[ \begin{array}{cccc} 1 & 0 & 1 & 0 \\\\ 0 & 1 & 1 & 0 \\\\ 0 & 0 & 0 & 0 \end{array} \right]

The reduced row echelon form of the augmented matrix is

\left[ \begin{array}{cccc} 1 & 0 & 1 & 0 \\\\ 0 & 1 & 1 & 0 \\\\ 0 & 0 & 0 & 0 \end{array} \right]

which corresponds to the system

\begin{array}{ccccc}x_1&&-x_3&=&0\\&x_2&+x_3&=&0\\&&0&=&0\end{array}

The system has infinitely many solutions.

\begin{array}{ccc}x_1&=&-x_3\\x_2&=&-x_3\\x_3&=&arbitrary\end{array}

7 0
3 years ago
1. ARCHAEOLOGY While digging a hole to plant a tree,
klio [65]
2(pi)r

2(pi)0.75
Circumference is 4.71.
7 0
2 years ago
Write a function rule that represents the situation. The almond extract a remaining in an 8-oz bottle decreases by 1/6 oz for ea
katen-ka-za [31]

f(b) = -1/6b + 8. Is the function rule if you want. further explanation just ask.

3 0
3 years ago
Solve: 6 – x = 4(5 + x) – 4
frez [133]

Answer:

x= -2

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • An object is thrown upward at a speed of 121 feet per second by a machine from a height of 8 feet off the ground. The height h o
    6·1 answer
  • Zach keeps his pet chameleon Pinky in a terrarium with the dimensions 8 x 20. There are three inches of sand in the bottom of th
    10·1 answer
  • Evaluate (4.0x10^5)(7.0x10^7)
    9·1 answer
  • Write the difference as a sum.<br> -15 - (-7)
    6·2 answers
  • if 2/3 of the girls in class have brown eyes and 1/4 of the girls have blue eyes, what fraction of the girls in class have neith
    8·1 answer
  • last year she had 12 records in her collection. now she has 15. what is the percent increase of her collection
    8·1 answer
  • According to the records of an electric company serving the Boston area, the mean electric consumption for all households during
    12·1 answer
  • Albert makes 20 kg of sweets in 5 weeks. If he continued to make sweets, how much would he have after 10 weeks?
    14·1 answer
  • Perimeter<br>pi = 22/ 7 any help? ​
    8·2 answers
  • What is the y- intercept of this quadratic funtions f(x)=-x2+10x-22
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!