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Airida [17]
2 years ago
12

Decide if this is a combination or permutation and then answer the question. Minnie has 4 different stamps. She needs 3 to mail

a large letter. How many ways can she pick the 3 that will be used?(pick two)
A. combination
B. permutation
C. 4
D. 3
E. 24
F. 12
Mathematics
1 answer:
Sergio039 [100]2 years ago
7 0
It is a combination, becasue the order does not matter

C (4,3) = 4! / [3! (4-3)!] = 4

Answer: A and C.




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Complete #2 for me and show proof , will give brainliest to whose right .​
Stells [14]

Answer:

<u>X</u> <u>Y</u> <u>(</u><u>X,</u><u>Y)</u>

-4 14. (-4,14)

-3 12. (-3,12)

-2 10. (-2,10)

-1 8. (-1,8)

0 6 (0,6)

1 4. (1,4)

2 2. (2,2)

4 0
2 years ago
El 30% del 40% de 60 es/ 30% of 40% of 60 is​
Nitella [24]

Step-by-step explanation:

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4 0
3 years ago
A real estate company wants to build a parking lot along the side of one of its buildings using 400 feet of fence. If the side a
svetlana [45]

Answer:

1.) Therefore the side parallel to the building is 100 feet.

2.) The side perpendicular to the building is 200 feet.

Step-by-step explanation:

The parking lot, which is rectangular,  is built along the side of one of its buildings.

The side of the parking lot which is alongside the building needs no fence,

let us say that this side is of length y.

Let the perpendicular to the building be of length x.

The perimeter of the parking lot that actually needs to be fenced  = 2x + y

The amount of fencing available  = 400 feet.

Therefore 2x + y = 400    ....    (i)

Therefore y = 400 - 2x     ....    (ii)

The area of the parking lot, A = xy   =   x ( 400 - 2x)  =   400x - 2x^2   ....   (iii)

Therefore \frac{dA}{dx}  = \frac{d(400x - 2x^2}{dx}  = 400 - 4x     ....   (iv)

Also we get \frac{d^2A}{dx^2}  = -4     ....    (v)

Hence we will get the maximum value of the parking lot by equating the first order differential of area, A to zero as the second order differential of area, A is negative.

Therefore from (iv) we get 400 - 4x  = 0     ∴ x = 100 feet

y  = 400 - 2x = 400 - 200 = 200 feet.

1.) Therefore the side parallel to the building is 100 feet.

2.) The side perpendicular to the building is 200 feet.

6 0
3 years ago
In the geometric pattern below, n represents the number of blocks in the bottom row of each figure.
MrMuchimi
Figure 1
n=1→f(n)=f(1)=1

Options 2 or 3

Figure 2
n=2→f(n)=f(2)=5

With Option 2:
f(n)=f(n-1)+2n
n=2→f(2)=f(2-1)+2(2)
f(2)=f(1)+4=1+4→f(2)=5  ok

With Option 3
f(n)=f(n-1)+n
n=2→f(2)=f(2-1)+2
f(2)=f(1)+2=1+2→f(2)=3  No

Answer: Second option: f(1)=1; f(n)=f(n-1)+2n; for n>=2




4 0
3 years ago
Read 2 more answers
Describe a real life multiplication situation for which an estimate make sense
Wittaler [7]
So, let's say that I have 3 bills: a 50 dollar bill, a 100 dollar bill and 1 dollar bill.

I need to buy 9 pens for my friends, and each of the pens costs 4.34 dollars.

I want to know if I can just take the 50 dollar bill, since I'm not too comfortable to carry the 100 dollar bill the whole day.

A quick estiate tells me that 10 times 5 is 50, and since both numbers are less, then in fact, 50 dollar bill will be enough!
5 0
3 years ago
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