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3 years ago

Someone please help!! i mark brainliest!!

Mathematics

1 answer:

jekas [21]3 years ago

7 0

Here is the answers,

(-a).(-b)=c

(-a).(b)=-c

(-c)/(-b)=a

(-c)/(b)=-a

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I AM A FACTOR OF 50 AND A MULTIPLE OF 5 ,I AM A 2 -DIGIT NUMBER GREATER THAN 10 BUT LESS THAN 40. WHAT NUMBER AM I?

umka21 [38]

The number is 25 because the factors of 50 are 1,2,5,10,25,50 and the number is two digits and is greater than 10 an 40. So the answer is 25.

7 0

3 years ago

What is the length of this line? khan academy - Distance between two points

patriot [66]

Answer:

D = √[(x2 - x1)² + (y2 - y1)²]

Step-by-step explanation:

Given a right-angled triangle, with sides: Hypotenuse D, and opposites (x2 - x1) and (y2 - y1).

Then by Pythagoras theorem, the square of the hypotenuse is equal to the sum of the squares of the opposite side.

That is,

D² = (x2 - x1)² + (y2 - y1)²

Now, taking square roots of both side, we have the formula for the distance or length D.

D = √[(x2 - x1)² + (y2 - y1)²]

3 0

3 years ago

For i≥1 , let Xi∼G1/2 be distributed Geometrically with parameter 1/2 . Define Yn=1n−−√∑i=1n(Xi−2) Approximate P(−1≤Yn≤2) with l

murzikaleks [220]

Answer:

The answer is "0.68".

Step-by-step explanation:

Given value:

$X_i \sim \frac{G_1}{2}$

$E(X_i)=2 \\$

$Var (X_i)= \frac{1- \frac{1}{2}}{(\frac{1}{2})^2}\\$

$= \frac{ \frac{2-1}{2}}{\frac{1}{4}}\\\\= \frac{ \frac{1}{2}}{\frac{1}{4}}\\\\= \frac{1}{2} \times \frac{4}{1}\\\\= \frac{4}{2}\\\\=2$

Now we calculate the $\bar X \sim N(2, \sqrt{\frac{2}{n}})\\$

$\to \frac{\bar X - 2}{\sqrt{\frac{2}{n}}} \sim N(0, 1)\\$

$\to \sum^n_{i=1} \frac{X_i - 2}{n} \times\sqrt{\frac{n}{2}}} \sim N(0, 1)\\\\\to \sum^n_{i=1} \frac{X_i - 2}{\sqrt{2n}} \sim N(0, 1)\\$

$\to Z_n = \frac{1}{\sqrt{n}} \sum^n_{i=1} (X_i -2) \sim N(0, 2)\\$

$\to P(-1 \leq X_n \leq 2) = P(Z_n \leq Z) -P(Z_n \leq -1) \\\\$

$= 0.92 -0.24\\\\= 0.68$

6 0

3 years ago

TJ-Maxx offered a 36% discount off the original

Allisa [31]

Answer:

$25.00

Step-by-step explanation:

well start of by using the rules of 3.

( always remeber that multiply is diagonal and divide left by one on the left)

4 0

3 years ago

Read 2 more answers

Help please if very much appreciate it. ?

Alex777 [14]

Answer:

7. 0.6

8. 0.45

9. 0.48

10. 0.28

11. 0.15

12. 0.75

8 0

3 years ago

Read 2 more answers

Someone please help!! i mark brainliest!!​

Someone please help!! i mark brainliest!!