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3 years ago

Please help me for 3, 4, and 5 please

Mathematics

1 answer:

almond37 [142]3 years ago

3 0

Answer:

Step-by-step explanation:

3: Possible outcomes for a coin flip; heads tails

Total possible outcomes for two coin flips 2*2=4

Out the 4 possible outcomes only 1 of them both times it land on heads

1/4

4: and 5 i dont know

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The NAR estimates that 23% of all homes purchased in 2004 were considered investment properties. If a sample of 800 homes sold i

Natali [406]

Answer: 0.7752

Step-by-step explanation:

Given : The proportion of all homes purchased in 2004 were considered investment properties estimated by NAR: p = 0.23

Sample size : n= 800

Required sample proportion : $\dfrac{175}{800}=0.21875$

Now , the probability that at least 175 homes are going to be used as investments will be :

$P(p\geq 0.21875)=P(\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}\geq\dfrac{0.21875-0.23}{\sqrt{\dfrac{0.23(1-0.23)}{800}}})\\\\=P(z\geq-0.756)\ \ [\because\ z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}]\\\\=P(z-z)=P(Z$ [using p-value calculator or z-table]

Hence, the required probability = 0.7752

8 0

4 years ago

What is five hundred seventy-seven in standard form?

Vesna [10]

In mathematical form, it can be written as : 577
Standard form of 577 would be: 500 + 70 + 7

Hope this helps!

7 0

4 years ago

A bedroom is in the shape of a rectangle. The length of the bedroom is represented by 3x^2 and the width is represented by 7x+14

pentagon [3]

The area of the room that is not covered by the rug is: $21x^3+26x^2-24x+9$

Step-by-step explanation:

Let L be the length of the room

and

W be the width of the room

Then

L = 3x^2

W = 7x+14

Area of the bedroom:

$A_r = L*W\\=3x^2(7x+14)\\=21x^3+42x^2$

Area of Rug:

Let S be the side of rug

S = 4x+3

$A_{rug} =S^2\\=(4x+3)^2\\=(4x)^2+2(4x)(3)+(3)^2\\=16x^2+24x+9$

The area of the room that is not covered by the rug will be obtained by subtracting the area of the rug from the area of the room.

So,

$Area\ of\ room\ not\ covered\ by\ rug =A_r - A_{rug}\\= 21x^3+42x^2-(16x^2+24x+9)\\=21x^3+42x^2-16x^2-24x-9\\=21x^3+26x^2-24x+9$

Hence,

The area of the room that is not covered by the rug is: $21x^3+26x^2-24x+9$

Keywords: Rectangle, square

Learn more about area at:

#LearnwithBrainly

6 0

3 years ago

An electronics company manufactures widescreen television sets in several different sizes. the rectangular viewing area of each

pav-90 [236]

Knowing that the tow rectangular viewing area peremiters are similar, we can establish a rule of three to find the viewing area of the 46-inch widescreen.

$\frac{42}{144.4} = \frac{46}{x}$
Now we solve for x to find the viewing area of the 46-inch widescreen:
$x= \frac{(46)(144.4)}{42}$
$x=158.6$

We can conclude that the viewing area perimeter of the 46-inch widescreen television set is approximately 158.6 inches.

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3 years ago

Select the option for “?” That continues the pattern for each question... <br> 3,-6, 12, 4, 20,?

BigorU [14]

Answer: I'm not completely sure

Step-by-step explanation:20

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4 years ago