All categories

2 years ago

Rút gọn (x-4) (x-3) -x(x+5) +82

Mathematics

1 answer:

WINSTONCH [101]2 years ago

5 0

Answer:

-12x + 94

Step-by-step explanation:

Simplify:

$\left(x-4\right)\left(x-3\right)-x\left(x+5\right)+82$

$=x^2-7x+12-x\left(x+5\right)+82$

$=x^2-7x+12-x^2-5x+82$

$=x^2-x^2-7x-5x+12+82$

$=-7x-5x+12+82$

$=-7x-5x+94$

$=-12x+94$

You might be interested in

What does four x plus five equal to?

emmasim [6.3K]

Step-by-step explanation:

im srry if it doesnt help...

8 0

3 years ago

Learn with an example

Marta_Voda [28]

Answer:

y = 9x + (-7) should be the answer

6 0

3 years ago

Is (2,2) a solution of the system

pashok25 [27]

Answer:

Hi, you don't provide us with the system here...

to figure out if 2,2 is a solution of the system, you have to plug the value of 2 in for both x and y in the system, and solve to see if it comes out or not...

If you provide the system I can definitely help you out more specifically!

3 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 <u> </u><u>100</u>

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 is NOT a polynomial?

fomenos

The first is not a polynomial as one term is dividing.

3 0

3 years ago