All categories

3 years ago

Help answers pls I beg pls

Mathematics

1 answer:

solmaris [256]3 years ago

3 0

5. 4/10 6. 9/15 7. 14/20 8. 16/50
First number is the numerator and second denominator

You might be interested in

Diana has 3/4 foot of ribbon. She used 1/3 foot to make a bow for her doll. How much ribbon, in feet, is left over?

Norma-Jean [14]

Answer: 5/12

Step-by-step explanation: you first need to make the denominators of the fractions equivalent. The least common factor of 3 and 4 is 12. 3/4 becomes 9/12 and 1/3 becomes 4/12. Now you can subtract. 9/12 - 4/12 = 5/12

6 0

3 years ago

A probability distribution for a random variable Y is given by P(Y=y)=cy, for y=1,2,4,5 and c is a constant. Find E(Y), the expe

Dahasolnce [82]

Answer:

$c(1+2+4+5) =1$

$c =\frac{1}{12}$

Now we can find the expected value with this formula:

$E(Y) =\sum_{i=1}^n Y_i P(Y_i) =\sum_{i=1}^n cy_i *y_i = cy^2_i$

And replacing we got:

$E(Y) = \frac{1}{12} (1^2 + 2^2 + 4^2 +5^2) = \frac{46}{12}= \frac{23}{6}$

Step-by-step explanation:

For this case we know the following probability mass function given:

$P(y) = cy , y= 1,2,4,5$

For this case we need to satisfy the following condition in order to have a probability distribution function:

$\sum_{i=1}^n P(y_i) =1$

And we have this:

$c(1+2+4+5) =1$

$c =\frac{1}{12}$

Now we can find the expected value with this formula:

$E(Y) =\sum_{i=1}^n Y_i P(Y_i) =\sum_{i=1}^n cy_i *y_i = cy^2_i$

And replacing we got:

$E(Y) = \frac{1}{12} (1^2 + 2^2 + 4^2 +5^2) = \frac{46}{12}= \frac{23}{6}$

6 0

3 years ago

How to solve the equation.. 1/4x=7

Sedaia [141]

Answer:

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

The diameter of the base of a cone is shown on the grid. Each square unit on the grid has a side length of 1 foot. The volume of

Andru [333]

What grid?
Ikniw how to do this but i dont think this is the whole question

7 0

3 years ago

The price of the jacket $60.The sales tax is 8% of the price. How much is the sales tax on the jacket?

kykrilka [37]

The sales tax on the jacket is $4.8. Add the price and the sales tax together and you get $64.8 on the Jacket including sales tax.

7 0

4 years ago