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Nat2105 [25]
2 years ago
13

What is the perimeter of a square with an area of 81 cm2

Mathematics
2 answers:
Bad White [126]2 years ago
7 0

Answer:

36cm

Step-by-step explanation:

A square has 4 equal sides so you can find the square root of 81 which is 9. Each side is 9cm, so just add the four sides and it gives you 36. Hope this helps^^

tatyana61 [14]2 years ago
6 0

Answer:

36 cm

Step-by-step explanation:

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Is the given value a solution to the equation? 4(n) - 3 = -2(n) + 9 n=2
nlexa [21]

Answer:

Yes!

The solution to the equation is n = 2

Step-by-step explanation:

Given the equation

4\left(n\right)-3=-2\left(n\right)+9

remove the parentheses

4n-3=-2n+9

Add 3 to both sides

4n-3+3=-2n+9+3

Simplify

4n=-2n+12

Add 2n to both sides

4n+2n=-2n+12+2n

Simplify

6n=12

Divide both sides by 6

\frac{6n}{6}=\frac{12}{6}

Simplify

n=2

Therefore, the value of n = 2.

Hence,

Yes!

The solution to the equation is n = 2

5 0
3 years ago
(r3 +6r2 −21r−18)÷(r−3) solve using synthetic division
alexandr402 [8]

Answer:

y = x^2 + 9x + 6    No remainder.

Step-by-step explanation:

The divisor will be 3 The sign on the divisor switches.

3 || 1    +     6    -    21    -   18 ||

                 3         27     + 18

================================

      1          9         6          0


The answser is x^2 + 9x + 6

5 0
3 years ago
What is the perimeter of a rectangle that
expeople1 [14]

Answer:

<h2>The answer is option C</h2>

Step-by-step explanation:

Perimeter of a rectangle = 2l + 2w

where

l is the length

w is the width

From the question

l = 9 cm

w = 6 cm

Substitute the values into the above formula and solve

We have

P = 2(9) + 2(6)

= 18 + 12

We have the final answer as

<h3>P = 30 cm</h3>

Hope this helps you

6 0
3 years ago
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NemiM [27]

Answer:

here's the graph

Step-by-step explanation:

5 0
3 years ago
Use a calculator to find the standard deviation of this data set:
Rashid [163]

Answer:

3.5

Hope this helps!

4 0
2 years ago
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