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luda_lava [24]
2 years ago
7

A square has a perimeter of 39.6 millimeters. What is the length of each side?​

Mathematics
2 answers:
Fofino [41]2 years ago
4 0

Answer:

9.9 mm

Step-by-step explanation:

let x = length of one edge of the square

perimeter of a square = 4x

⇒ 39.6 = 4x

⇒ x = 39.6 ÷ 4 = 9.9 mm

garri49 [273]2 years ago
3 0

Answer:

9.9 millimeters

Step-by-step explanation:

To find the perimeter of a square,

Equation: 4 • length = P

So in this case, we're just working backwards. To find the length, divide.

39.6/4 = 9.9

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A is inversely proportional to b. If a=7.2 when b=-4, what will a equal when b=6?
Tpy6a [65]

Answer:

<h2>a = - 4.8</h2>

Step-by-step explanation:

To find the value of a when b=6 we must first find the relationship between them.

The statement

a is inversely proportional to b is written as

a \:  \:  \alpha  \:  \:  \frac{k}{b}

where k is the constant of proportionality

When a = 7.2 , b = -4

So we have

7.2=  \frac{k}{ - 4}

k = 7.2 × - 4

k = - 28.8

So the formula for the variation is

a =  -  \frac{28.8}{b}

When

b = 6

That's

a =  -  \frac{28.8}{6}

We have the final answer as

<h3>a = - 4.8</h3>

Hope this helps you

7 0
3 years ago
Does anyone know how to solve this
madam [21]
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6 0
2 years ago
Rewrite the fraction in the sentence below as a percentage 21/25
Paul [167]
21/25


Change to decimal:-

Divide numerator by denominator.


21/25

21 ÷ 25 = 0.84

21/25 = 0.84

Change to a percentage:-

0.84 × 100 = 84

21/25 = 0.84 = 84%
6 0
3 years ago
The measured weights of 1,000 men in a certain village follow a normal distribution with a mean of 150 pounds and a standard dev
Hitman42 [59]
Z = (X-Mean)/SD 
<span>z1 = (165 - 150)/15 = +1 </span>
<span>z2 = (135 - 150)/15 = - 1 </span>
<span>According to the Empirical Rule 68-95-99.7 </span>
<span>Mean +/- 1SD covers 68% of the values </span>
<span>100% - 68% = 32% </span>
<span>The remaining 32% is equally distributed below z = - 1 and z = +1 </span>
<span>32%/2 = 16% 
</span>
<span>Therefore, 
</span>
<span>a) Number of men weighing more than 165 pounds = 16% of 1000 = 160 </span>
<span>b) Number of men weighing less than 135 pounds = 16% of 1000 = 160</span>
3 0
3 years ago
Read 2 more answers
A skincare company posts advertisements via social media. The probability model describes the number of times the company may po
scoundrel [369]

Answer:

2.06

Step-by-step explanation:

the answer is the sum of all of the products of posts made by the P(X) under it.

also... I got it right on my quiz

7 0
2 years ago
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