Ask question

Ask question

All categories

2 years ago

12

Every member of the family gives a gift to every other member of the family. There are ten members this year. If there are just

2 members exchanging gifts, how many gifts will be exchanged

1 answer:

Eva8 [605]2 years ago

7 0

The statement is contradictory, because it is said that every member of the family gives a gift to every other member of the family. And from 10 members, there are just 2 exchanging. Anyway, maybe they are only 2 members exchanging the gifts at that point in time.
So, each member will exchange 9 gifts (that is 10 members total minus herself), and 2 members are exchanging gifts at that point, so 18 gifts are being exchanged.

You might be interested in

How many days were in February in 1984?

zimovet [89]

There were 29 days in February 1984.

5 0

2 years ago

A population of mice is increasing exponentially. On Monday there were 120 mice. One month later there were 132 mice. Write a fu

den301095 [7]

Answer:

$y =120*1.1^x$

$r = 10\%$ --- Percentage increase

Step-by-step explanation:

Given

Let

$x \to months$

$y \to mice$

So, we have:

$(x_1,y_1) = (0,120)$ --- Monday

$(x_2,y_2) = (1,132)$ --- One month later

Required

The function

The function is represented as:

$y = ab^x$

In $(x_1,y_1) = (0,120)$ , we have:

$120 =a * 1$

$120 =a$

Rewrite as:

$a = 120$

In $(x_2,y_2) = (1,132)$ , we have:

$132 = a * b^1$

$132 = a * b$

Substitute $a = 120$

$132 = 120 * b$

Solve for b

$b = \frac{132}{120}$

$b = 1.1$

Recall that:

$y = ab^x$

Hence, the function is:

$y =120*1.1^x$

To get the monthly percentage increase (r), we have:

$y = a(1 + r)^x$

Compare to: $y = ab^x$

So:

$1+r =b$

Make r the subject

$r = b-1$

$r = 1.1-1$

$r = 0.1$

Express as percentage

$r = 0.1*100\%$

$r = 10\%$

8 0

2 years ago

Pumped up gym has a membership plan that charges $35 a month plus a one time initiation fee of $20. If Jeremy has spent $545 on

NemiM [27]

Answer:

15 months

Step-by-step explanation:

35x+20=545

Subtract 20 from both side to figure out how many months he paid for....

35x+20-20=545-20

35x=525

Divide 35 on both sides....

x=15

Therefore, he has been a member for 15 months

Check:

35(15)+20=545

525+20=545

545=545

IT'S CORRECT!!!

MARK ME BRAINLEST PLS THANKS :)

3 0

2 years ago

Erin received the following scores on her last four spelling tests.

Helen [10]

I'm not sure what you do with the whole numbers but 0.8 is 80% and 82% is higher than 80% so its not 0.8

4 0

2 years ago

Wasilla, Alaska currently has a population of 10,000 people. It's population has been increasing by

Aleksandr-060686 [28]

Answer:

she’s running in uppercase

5 0

2 years ago