Help plz anyone plz help me !!!!!!!!

Umber 8. What is the value of the expression - -g-(-5) =-9 - 5 5

pantera1 [17]

First, we want to subtract the numbers within the parenthesis. However, to do this we must put each number over a common denominator. We can do his by multiplying

6

by the appropriate for of

1

:

2

3

(

6

−

5

6

)

⇒

2

3

(

[

6

×

6

]

−

5

6

)

⇒

2

3

(

36

6

−

5

6

)

⇒

2

3

(

31

6

)

Next, we can multiply the two fractions to complete the evaluation of the expression:

2

3

(

31

6

)

⇒

2

3

×

31

6

⇒

2

×

31

3

×

6

⇒

62

18

Now, we can factor the numerator and denominator so we can cancel common terms. This will give the simplest form of the fraction:

2

×

31

2

×

9

⇒

2

×

31

2

×

9

⇒

31

9

Hope this helps

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7 0

3 years ago

A simplified model for the movement of the price of a stock supposes that on each day the stock’s price either moves up 1 unit w

DanielleElmas [232]

Answer:

(a) The probability that after 2 days the stock will be at its original price is

$P_a=2p(1-p)$

(b) The probability that after 3 days the stock’s price will have increased by 1 unit is

$P_b=3p^2(1-p)$

(c) Given that after 3 days the stock’s price has increased by 1 unit, the probability that it went up on the first day is

$P=2/3$

Step-by-step explanation:

(a) What is the probability that after 2 days the stock will be at its original price?

For the price of the stock to be in its original price, there are two ways it can happen:

1) the price increases the first day by one unit and decreases by one unit the second day. The probability of this event is P=p*(1-p).

2) the price decreases the first day by one unit and increases by one unit the second day. The probability of this event is P=(1-p)p.

The probability that after 2 days the stock will be at its original price is the sum of the probability of this two events:

$P=P_1+P_2=p(1-p)+(1-p)p=2p(1-p)$

(b) What is the probability that after 3 days the stock’s price will have increased by 1 unit?

For this event to happen (one unit increase in 3 days), it must have happened 2 increases in price and 1 decrease.

There are 3 possible ways of this to happen:

1) decrease in the first day.

2) decrease in the second day.

3) decrease in the third day.

Each one ot this 3 events has the same probability $P_i=p^2(1-p)$ .

So the probability that after 3 days the stock’s price will have increased by 1 unit is equal to the sum of the probabilities of this events:

$P=P_1+P_2+P_3=3p^2(1-p)$

(c) Given that after 3 days the stock’s price has increased by 1 unit, what is the probability that it went up on the first day?

According to the answer (c), there are 3 events where the price has increase by one unit after 3 days, each one with equal probability $P_i=p^2(1-p)$ .

Of these 3 events, there are 2 that have an increase in the first day. So we can conclude that, if the events have the same probability, the probability of the increase in the first day, given that the price has increased by one unit in 3 days, is P=2/3.

8 0

4 years ago

What is the x value with that y =15 -3x and y =0?

kumpel [21]

$\bf y=15-3x~\hspace{5em} \stackrel{y=0}{0=15-3x}\implies 3x=15\implies x=\cfrac{15}{3}\implies x = 5$

4 0

3 years ago

Read 2 more answers

Help lol, due on monday

lyudmila [28]

Answer:

6. There will be 6 necklaces.

7. Craig is 15 years old.

8. Kim rented the skates for 4 hours.

Step-by-step explanation:

6. 102/17 is 6.

7. Since her sister is 3 years younger, that means that Craig is 3 years older.

8. 8 divided by 2 is 4.

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4 0

3 years ago

The area of a parallelogram is 216 cm². The height of the parallelogram is 2/3 of its base. Find the base and height.

grin007 [14]

2 equations, 2 unknowns. Call height H and base B.

From the first sentence:
HB = 216

From the second sentence:
H = ⅔ B

Plug the second into the first and solve for B:
(⅔ B)B = 216
B^2 = 324
B = 18

Plug that back into either of the original 2 equations and solve for H:
H(18) = 216
H = 12

3 0

3 years ago