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4 years ago

In how many ways can you select two people from a group of 20 if the order of selection is not important?

Mathematics

1 answer:

Svetllana [295]4 years ago

3 0

That is 20C2 The number of combinations of 2 from 20

= 20 * 19 / 2*1 = 190 answer

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Identify the vertex of the parabola.

7nadin3 [17]

I think is c be cause I took test

5 0

3 years ago

Read 2 more answers

Express the limit as a definite integral on the given interval. lim n→[infinity] n xi ln(1 + xi2) Δx, [2, 7] i = 1

xenn [34]

Answer:

Step-by-step explanation:

$Consider \ the \ following \ series$

$\lim_{n \to \infty} \sum \limits ^n_{i=1} x_i \ In ( 1+ x_i^2) \Delta x , [2,7]$

$Let's \ recall \ the \ explanation \ of$ d $efinite$ $\ integral \ in \ terms \ of \ Riemann \ sum$

$\int^b_a \ f(x) \ dx = \lim_{n \to \infty} \sum \limits ^n_{i=1} \ f(x_i) \Delta x , \ where \ \Delta x = \dfrac{b-a}{n}$

$By \ efinition, \ the \ limit \ is \ then \ expressed \ as \ integral$

$\lim_{n \to \infty} \sum ^a_{i=1} \ x_i \ In (1+x_i^2) \Delta x = \int^7_2 xIn (1+x^2) \ dx$

7 0

3 years ago

Jessica went shopping and bought a pair of jeans that were on sale for 25% off the original price of $23.98. A 6% tax was also a

Ghella [55]

Answer:

$19.07

Step-by-step explanation:

First off we need to find the discounted price of the jeans that Jessica bought.

We find the discount by multiplying the original price by 25% or 0.25

Discount Price = 23.98 x 0.25

Discount Price = 5.99

Now we subtract the discount from the original price.

Discounted Price = 23.98 -5.99

Discounted Price = 17.99

Now that we have the discounted price, we then compute for the sales tax.

Sales Tax = 17.99 x 0.06

Sales Tax = 1.08

Then we add the sales tax to the discounted price.

Total Price = 17.99 + 1.08

Total Price = $19.07

Jessica spent $19.07 on the jeans.

6 0

4 years ago

Write the coordinate of the point in the diagram.

Butoxors [25]

Answer:-5,5,5

Step-by-step explanation:

6 0

3 years ago

Find the value of 4/5 - 7/5 to its lowest terms

erik [133]

Answer:

Step-by-step explanation:

4/5 - 7/5

7-4/5

3/5

4/5 - 7/5

4-7/5

-3/5

3 0

2 years ago