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Zarrin [17]
3 years ago
15

Consider 10 married couples. how many ways can 7 married couples be selected from this group

Mathematics
1 answer:
Novay_Z [31]3 years ago
3 0
10c7
=10!/(7!*(10-7)!)
=120
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What is the distributive property of 2(3+6y)
serious [3.7K]

Answer:

6+12y

Step-by-step explanation:

first, distribute the 2 to the parenthesis:

-multiply the 2 to the 3 and 6y

We get 6+12y

hope this helps :)

7 0
3 years ago
Can someone help I’m not supposed to have school today but I’m stuck
gregori [183]
What are directions?
7 0
4 years ago
Read 2 more answers
a utility worker is 5.5 feet tall and is casting a shadow 4 feet long at the same time a nearby utility pole casts a shadow 20 f
Assoli18 [71]

So this is essentially a proportion problem. They want you to be able to recognize a relationship between the two. The easiest way to go about this is to draw a picture (I have included one). What you want to do is notice that you are given both shadow lengths. This is essentially going to be your first step to creating the proportion.


Understanding that we know the shadow lengths, we can turn these into a fraction such as so:


4ft/20ft.


Now that we know that, we need to look at are unknown. Our unknown is the height of the utility pole. We can solve this by substituting for X since we know the utility worker is 5.5 ft tall.


Your fraction for that would look like:


5.5ft/X


Make sure to always make your top to top match, such as since I put the utility worker's shadow on top, I need to put his height on top.

Now we can solve.

4ft/20ft =5.5ft/X


We need to cross multiply to get an equation we can work with. If we cross multiply, Your equation will look like:


4x = 110ft


This is a simple one step equation. Divide both sides by 4 to get your answer.

x= 27.5ft.

This means your Utility pole's height is 27.5ft.

6 0
3 years ago
If t= 14,what is the value of 3t?
Goryan [66]
42 bro it’s pretty simple just multiplication
7 0
3 years ago
What are the factors of 3x2 + 10x + 8?
DaniilM [7]
(3x+4) (x+2)
This gives you 3x^2 + 6x + 4x + 8
Which simplifies to 3x^2 + 10x + 8
4 0
3 years ago
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