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3 years ago

Which lines are perpendicular to the line y - 1 = {(x+2)? Check all that apply.

Mathematics

1 answer:

Citrus2011 [14]3 years ago

4 0

Answer:

A.) y + 2 = –3(x – 4)

C.) y = -3x – Five-thirds

D.) 3x + y = 7

Step-by-step explanation:

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Samples of skin experiencing desquamation are analyzed for both moisture and melanin content. The results from 100 skin samples

zheka24 [161]

Answer: a. 0.40 b. 0.23 c . 0.435 d . 0.25

Step-by-step explanation:

melanin content Total

high low

moisture high 13 10 23

content low 47 30 77

Total 60 40 100

Let A denote the event that a sample has low melanin content, and let B denote the event that a sample has high moisture content.

a) Total skin samples has low melanin content = 10+30=40

P(A)= $\dfrac{40}{100}=0.40$

b) Total skin samples has high moisture content = 13+10=23

P(B) = $\dfrac{23}{100}=0.23$

c) A ∩ B = Total skin samples has both low melanin content and high moisture content =10

P(A ∩ B) = $\dfrac{10}{100}=0.10$

Using conditional probability formula , $P (A|B)=\dfrac{P(A\cap B)}{P(B)}$

$P (A|B)=\dfrac{0.10}{0.23}=0.434782608696\approx0.435$

d) $P (B|A)=\dfrac{P(A\cap B)}{P(A)}$

$P (B|A)=\dfrac{0.10}{0.40}=0.25$

8 0

3 years ago

[3.2×(6.1+6.3)]-2.8=

iris [78.8K]

Answer:

36.88

Step-by-step explanation:

6.1 + 6.3 = 12.4

3.2 x 12.4 = 39.68

39.68 - 2.8 = 36.88

4 0

3 years ago

What is the ratio? please answer quickly!!!!!

Kazeer [188]

Answer:

3:1

Step-by-step explanation:

If you look at the sides, they all have the same factor of three, and dividing by three gets you to the smaller rectangular prism.

6 0

3 years ago

13x+y=4 plz help i cant get it right lol

kati45 [8]

Answer:

Step-by-step explanation:

look up top for explanation

7 0

3 years ago

Read 2 more answers

I need help number 13 and 14, how can I find x?

Alex73 [517]

#13.
x = 50

#14
x = 142

7 0

3 years ago