What is the sum of 2 and 3

2 answers:

5 0

2 + 3 is 5.
Think of it like this:
If you have two candies, then are given three more candies, then count them all up, you will realize that you have 5 candies.

Shkiper50 [21]3 years ago

4 0

6. Hope this hellpppp.

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ahrayia [7]

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3 years ago

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Neil put on a blindfold and picked 72 jelly beans from a jar.

Natasha2012 [34]

No because really it’s not explains nothing

5 0

3 years ago

In an indoor soccer stadium, there are 20 seats in the first row and 31 seats in the second row. Every

Finger [1]

Step-by-step Solution for Part-a:

Row-1: 20 seats
Row-2: 20 + 11
Row-x: 20 + (11x - 11)

Since the number of rows in rows x is 20 + (11x - 11), the formula to calculate the number of seats in each row is 20 + (11x - 11).

Step-by-step Solution for Part-b:

y rows = 174 seats
Obtained rule from part-a: 20 + (11y - 11)

<u>Solution:</u>

20 + (11y - 11) = 174 rows
=> 20 + 11y - 11 = 174 rows
=> 9 + 11y = 174 rows
=> 11y = 174 - 9 rows
=> 11y = 165
=> y = 165/11
=> y = 15

Hence, the row which has 174 seats is row 15.

5 0

2 years ago

Create a matrix for this system of linear equations, The determinant of the coefficient matrix is

marin [14]

Answer: The determinant of the coefficient matrix is -15 and x = 3, y = 4, z = 1.

Step-by-step explanation: The given system of linear equations is :

$2x+y+3z=13~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)\\\\x+2y=11~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(ii)\\\\3x+z=10~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(iii)$

We are given to find the determinant of the coefficient matrix and to find the values of x, y and z.

The determinant of the co-efficient matrix is given by

$D=\begin{vmatrix}2 & 1 & 3\\ 1 & 2 & 0\\ 3 & 0 & 1\end{vmatrix}=2(2-0)+1(0-1)+3(0-6)=4-1-18=-15.$

Now, from equations (ii) and (iii), we have

$x+2y=11~~~~~\Rightarrow y=\dfrac{11-x}{2}~~~~~~~~~~~~~~~~~~~~~~~~~~(iv)\\\\\\3x+z=10~~~~~~\Rightarrow z=10-3x~~~~~~~~~~~~~~~~~~~~~~~~~(v)$

Substituting the value of y and z from equations (iv) and (v) in equation (i), we get

$2x+y+3z=13\\\\\Rightarrow 2x+\dfrac{11-x}{2}+3(10-3x)=13\\\\\Rightarrow 4x+11-x+60-18x=26\\\\\Rightarrow -15x+71=26\\\\\Rightarrow -15x=26-71\\\\\Rightarrow -15x=-45\\\\\Rightarrow x=3.$