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Alex17521 [72]
3 years ago
14

If a square has an area of 81 square how long is each side ?

Mathematics
1 answer:
Art [367]3 years ago
7 0
The area of a square is

       (length of a side) times (length of a side) .

So if you want to know the length of the side,
you have to find a number that gives you 81
when you multiply the number by itself.

That's called the "square root" of 81 .

Each side of your square is 9 units long.
You might be interested in
The length of a rectangle is 2 ft longer than its width.
tino4ka555 [31]

Hi! I'm happy to help!

To solve this, we first need to look at the perimeter equation:

P=2L+2W

We don't know our length, so we can represent it with x. Since our width is 2 feet shorter than x, we can represent it with x-2. Now, we plug these values into our equation:

56=2x+(2(x-2))

Let's simplify what the width is by multiplying:

56=2x+2x-4

Now, let's combine our 2xs

56=4x-4

Now, we just need to solve for x in order to find our length and width.

First, we need to isolate x on one side of the equation. We can do this by adding 4 to both sides:

56=4x-4

+4      +4

60=4x

Now, all we have to do is divide both sides by 4 and x will be fully isolated:

60=4x

÷4  ÷4

15=x

Now that we know x, let's plug this into our previous equations:

L=x=15

<u>L=15</u>

W=x-2=15-2=13

<u>W=13</u>

To verify our answers, we can plug this into our perimeter equation:

56=2(15)+2(13)

56=30+36

56=56

After double checking our answers, we know that our length is 15 and our width is 13.

I hope this was helpful, keep learning! :D

5 0
2 years ago
Please help me or I'm gonna fail math​
12345 [234]

Answer:

Step-by-step explanation:

as said in my comment

A: (3x-2)X(x+1)

B: substitute 3 in(if m=meters),

(3x3-2)

9-2

7X(x+1)

3+1

4

7X4

28

5 0
2 years ago
Read 2 more answers
M<br> (9x + 2)<br> 1<br> (5х – 1)°<br> 740<br> What is mz2?<br> 39°<br> 570<br> ОООО<br> 67°<br> 740
Elodia [21]

Answer:

<h3>           m∠2 = 67°</h3>

Step-by-step explanation:

m║n   ⇒   (9x + 2)° = 74°       {Corresponding Angles}

(9x)° = 72°

 x = 8

Angles: angle corresponding to angle (5x-1)°, angle 74° and angle 2 add to 180° (straight angle)

(5×8 - 1)° + 74° + m∠2 = 180°

39° + 74° + m∠2 = 180°

113° + m∠2 = 180°

m∠2 = 180° - 113°

m∠2 = 67°

7 0
2 years ago
Which of the following is equivalent to 18-V-25
EastWind [94]

Answer:

the correct answer is 18 - 5i.

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
What is 1whole and 1/8 as a mixed number​
user100 [1]

Step-by-step explanation:

i think you meant

1 whole number and 1/8

so

in mixed number is

9/8

Brainlest answer

7 0
3 years ago
Read 2 more answers
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