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3 years ago

The length of a room is 20 ft. and its width is 12 ft. What's the perimeter?

Mathematics

2 answers:

sattari [20]3 years ago

7 0

Answer:

Perimeter = 64ft

Step-by-step explanation:

Perimeter is the sum of the sides i.e. length and width

Perimeter = 20+20+12+12 = 64

iren2701 [21]3 years ago

5 0

Answer:

Step-by-step explanation:

20 + 20=40

12 +12 = 24

24+40=64

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Which of these sequences is a geometric sequence?

Lera25 [3.4K]

The geometric sequence is 3, 9, 27, 81, 243, 729 because each time it is multiplied by 3.

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3 years ago

The probability of being a universal donor is 6% (O-negative-blood type). Suppose that 6 people come to a blood drive.' a) What

Tcecarenko [31]

Answer:

$Mean = 0.36$

$SD = 0.5817$

$P(x=3) = 0.003588$

Step-by-step explanation:

Given

Let

A = Event of being a universal donor.

So:

$P(A) = 0.06$

$n = 6$

Solving (a): Mean and Standard deviation.

The mean is:

$Mean = np$

$Mean = 6 * 0.06$

$Mean = 0.36$

The standard deviation is:

$SD = \sqrt{np(1-p)}$

$SD = \sqrt{6*0.06*(1-0.06)}$

$SD = \sqrt{0.3384}$

$SD = 0.5817$

Solving (b): P(x = 3)

The event is a binomial event an dthe probability is calculated as:

$P(x) = ^nC_x * p^x * (1-p)^{n-x}$

So, we have:

$P(x=3) = ^6C_3 * 0.06^3 * (1-0.06)^{6-3}$

$P(x=3) = ^6C_3 * 0.06^3 * (1-0.06)^3$

$P(x=3) = 20 * 0.06^3 * (1-0.06)^3$

$P(x=3) = 0.003588$

7 0

3 years ago

Can anyone answer -6x-6(x+3)+10 and show the work please.

Archy [21]

The answer is -12x-8

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3 years ago

The vertices of triangle are A(-2 , 1 ) , B ( 2 , 2 ) and C ( 6 , -2 ) . Find the equation of the altitude of AD drawn from A to

krok68 [10]

Answer:

Given,

ABC is triangle with vertices A(-2,1), B(2,2) and C(6, -2)

Slope of BC(m_1) = $\frac{y_2-y_1}{x_2-x_1}=\frac{6-2}{-2-2}$

$=\frac{4}{-4}=-1$

Since AD is perpendicular to BC

let slope of BC be ( $m_2$ ).

We have for perpendicular

$m_1*m_2=-1$

$-1*m_2=-1$

$m_2=1$

Now equation of line passing through point A(-2,1) is

$y-y_1=m_2(x-x_1)$

y-1=1(x-(-2))

y-1=x+2

y=x+2+1

y=x+3 which is a required equation of the altitude of AD drawn from A to BC.

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3 years ago

√(x+1) +3=0 please help me

jarptica [38.1K]

First square each term to rid of the root sign:
x^2 + 1^2 + 3^2 = 0^2
x^2 + 1 + 9 = 0
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4 years ago