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3 years ago

Help me asap please! please answer all 4 questionsss!! thank you very muchhh!!!

Mathematics

1 answer:

cupoosta [38]3 years ago

7 0

Answer:

5. DE

6. 6cm

7.20 in

8. DCF

Step-by-step explanation:

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7.) x-3>4 please help

givi [52]

Answer:

x>7

Step-by-step explanation:

x-3>4

Add 3 to both sides

x>7

Hope it helped!

6 0

3 years ago

Read 2 more answers

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

Which expression can be used to solve 3/5•|• 7/10

Natasha2012 [34]

Answer: D

Step-by-step explanation: if you write it out it will be the exact same thing as D so it will be d

4 0

3 years ago

Which best explains why the given lines are or are not perpendicular x=-2,y=8

vesna_86 [32]

The two lines are perpendicular because both of the lines intersects

8 0

3 years ago

(X-2) is a factor of x^4+2x^3-7x^2-8x+12. The other factors are ____, ____, and _____

Vika [28.1K]

We have

$\dfrac{x^4+2x^3-7x^2-8x+12}{x-2}=x^3+4x^2+x-6$

The rational root theorem suggests that other possible roots may be -6, 6, -3, 3, -2, 2, -1, and 1. It turns out that $x=-2$ is a root, since $(-2)^3+4(-2)^2+(-2)-6=0$ , so $x+2$ is also a factor and we have

$\dfrac{x^4+2x^3-7x^2-8x+12}{(x-2)(x+2)}=x^2+2x-3$

Finally, we can factorize the remaining quotient easily:

$x^2+2x-3=(x+3)(x-1)$

so the other factors are $x+2$ , $x+3$ , and $x-1$ .

5 0

3 years ago

Help me asap please! please answer all 4 questionsss!! thank you very muchhh!!! ​

Help me asap please! please answer all 4 questionsss!! thank you very muchhh!!!