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3 years ago

Which number is an irrational number? o 2 0 - 3 02.56 O 16

Mathematics

1 answer:

Agata [3.3K]3 years ago

6 0

Answer:

2.56 is the correct answer because -3 can be turned into a rational number

and 2 an 16 are rational number

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According to the National Health Survey, the weights of individuals are normally distributed. Men have an average weight of 172

Lostsunrise [7]

Answer:

3.625

Step-by-step explanation:

The formula for sample standard deviation = Population standard deviation/√n

Where n = number of random samples

Population standard deviation = 29 pounds

n = 64 male students

Sample standard deviation = 29/√64

= 29/8

= 3.625

Therefore, the Sample standard deviation = 3.625

3 0

3 years ago

The length of a rectangle is 3 times the width. the perimeter is 96cm. find the length and width.

olga nikolaevna [1]

Let it's width be x
then, it's length = 3x

perimeter of a rectangle = 2 (l+b)
96 = 2 (3x+x)
96 = 8x
12 = x

so the widthe of that rectangle = 12cm and it's length = 3 (12) = 36cm.

3 0

3 years ago

The perimeter of a rectangle is 40 inches. The table shows some of the possible dimensions for the length and area of the rectan

Mama L [17]

Answer:

Therefore the Dimensions are

Length =18 inches and Width = 2 inches

Length =2 inches and Width = 18 inches

Step-by-step explanation:

Let the Width of rectangle be 'W' inches.

The length of a rectangle be 'L' inches.

Area of rectangle given is 36 square inches.

Perimeter of Rectangle is 40 inches.

To Find:

Length = L = ?

Width = W = ?

Solution:

Perimeter of Rectangle is given as

$\textrm{Perimeter of Rectangle}=2\times (Length +Width)$

Substituting we get

$40=2(L+W)\\\\L+W=20\\\therefore L=20-W$

We have area of rectangle given as

$\textrm{Area of Rectangle}=Length\times Width)$

Substituting the given values we get

$36=(20-W)\times W\\W^{2}-20W+36=0$

Which is a Quadratic Equation, So by Splitting the middle term we get

$W^{2}-18W-2W+36=0\\W(W-18)-2(W-18)=0\\(W-2)(W-18)=0\\\therefore W=2\ inches\ or\ W =18\ inches$

Therefore the Length will be

$L=20-W=20-2=18\ inches\\OR\\L=20-18=2\ inches$

Therefore the Dimensions are

Length =18 inches and Width = 2 inches

Length =2 inches and Width = 18 inches

7 0

3 years ago

H(x)=(x+5)^2 if we solve h(x)=36

Ivan

Answer:

x = - 11

Step-by-step explanation:

Solving

(x + 5)² = 36 ( take square root of both sides )

x + 5 = ± $\sqrt{36}$ = ± 6 ( subtract 5 from both sides )

x = - 5 ± 6

Then

x = - 5 + 6 = 1

x = - 5 - 6 = - 11

The other solution is x = - 11

6 0

3 years ago

Can someone pl help. Thx

kakasveta [241]

Answer:

3.10?

Step-by-step explanation:

i dont know sorry if its wrong

7 0

3 years ago