Ask question

Ask question

All categories

3 years ago

7

Mrs.Carlyle bought a bag of peanuts for her children. When Phillip, Joy, Brent, abd Preston came home from school, they each too

k some peanuts from the bag.

1 answer:

Kitty [74]3 years ago

7 0

Whats the question?

You might be interested in

A boat in calm seas travels in a straight line and ends the trip 22 km west and 53 km north of its original position. To the nea

daser333 [38]

<span> By tangent function... </span>

<span>tan(x) = 22/53 </span>
<span>x ≈ 23° Hope This Helps</span>

6 0

3 years ago

Read 2 more answers

-2x+3y=15, rearrange to write in slope-intercept form, y=mx+b, by isolating y.

Airida [17]

Y=2/3x+5 because -2x+3y=15 you have to +2x on both sides so it becomes 3y=15+2x. Then you divide 3 on both sides so it equals y=15+2/3. To makes it y=mx+b it becomes y=2/3x+5

8 0

3 years ago

A true-false quiz with 10 questions was given to a statistics class. Following is the probability distribution for the score of

disa [49]

Answer:

$E(X)=\sum_{i=1}^n X_i P(X_i)$

And if we use the values obtained we got:

$E(X)=5*0.05 +6*0.15 +7*0.33 +8*0.28+ 9*0.12 +10*0.07=7.48$

For this case this value means that the expected score is about 7.48

Step-by-step explanation:

For this case we assume the following probability distribution:

X 5 6 7 8 9 10

P(X) 0.05 0.15 0.33 0.28 0.12 0.07

First we need to find the expected value (first moment) and the second moment in order to find the variance and then the standard deviation.

In order to calculate the expected value we can use the following formula:

$E(X)=\sum_{i=1}^n X_i P(X_i)$

And if we use the values obtained we got:

$E(X)=5*0.05 +6*0.15 +7*0.33 +8*0.28+ 9*0.12 +10*0.07=7.48$

For this case this value means that the expected score is about 7.48

In order to find the standard deviation we need to find first the second moment, given by :

$E(X^2)=\sum_{i=1}^n X^2_i P(X_i)$

And using the formula we got:

$E(X^2)=(5^2 *0.05)+(6^2 *0.15)+(7^2 *0.33)+(8^2 *0.28)+ (9^2 *0.12 +(10^2 *0.07))=57.46$

Then we can find the variance with the following formula:

$Var(X)=E(X^2)-[E(X)]^2 =57.46-(7.48)^2 =1.5096$

And then the standard deviation would be given by:

$Sd(X)=\sqrt{Var(X)}=\sqrt{1.5096}=1.229$

5 0

4 years ago

Read 2 more answers

How fast can Usain Bolt run if it takes him 9.9 s to run 100 m?

Yuliya22 [10]

Answer:

100m/9.9 = ~10.1m/s

Step-by-step explanation:

6 0

3 years ago

Which angle measures less than a right angle?

Ann [662]

Acute angle bc its the smallest angle

5 0

3 years ago