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3 years ago

In which subsets does the number square root of 9 belong?

Mathematics

2 answers:

miss Akunina [59]3 years ago

8 0

Answer:

(D)Rational

Step-by-step explanation:

tia_tia [17]3 years ago

8 0

Step-by-step explanation:

<u>Step 1: What subsets does the number belong to</u>

<u /> $\sqrt{9}=3$

3 is a Whole number

3 is a Natural number/Above 0

3 is an Integer/Any number

3 is a Rational Number/That means it terminates

Answer: Option A, B, C, D

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2 years ago

Solve the following system by any method -8x-8y=0 -8x+2y=-20

iVinArrow [24]

$\fbox{Solution by using Matrix}$

$\text{Linear Equation} = -8x-8y=0 , -8x+2y=-20$

$\text{Rewrite the linear equations above as a matrix}$

$\left[\begin{array}{ccc}8&-8&0\\-8&2&-20\\\end{array}\right]$

$\text{Apply to Row2 : Row2 + Row1}$

$\left[\begin{array}{ccc}8&-8&0\\-8&-6&-20\\\end{array}\right]$

$\text{ Simplify rows}$

$\left[\begin{array}{ccc}8&-8&0\\0&1&10/3\\\end{array}\right]$

$\text{Note: The matrix is now in echelon form.}$ $\text{The steps below are for back substitution.}$

$\text{Apply to Row1 : Row1 + 8 Row2}$

$\left[\begin{array}{ccc}8&0&80/30\\0&1&10/3\\\end{array}\right]$

$\text{ Simplify rows}$

$\left[\begin{array}{ccc}1&0&10/3\\0&1&10/3\\\end{array}\right]$

$\text{Therefore, the solution is}$

$x= \dfrac{10}{3} \ \text{and} \ \ y=\dfrac{10}{3}$

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2 years ago