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Rudiy27
3 years ago
7

I’m still confused on how to do combinations and permutations?

Mathematics
1 answer:
Ostrovityanka [42]3 years ago
7 0

Honestly I would recommend you watch an online video on it.

But think of it this way,

Combinations is used when you "Choose" a certain number of things out of a total number and order does not matter.

Permutations are when you permutate or arrange in a "Particular" order where order matters.

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Y = 4x + 2<br> y = -2x - 4
BlackZzzverrR [31]

  Answer:

x = −1

y = −2

6 0
3 years ago
Which number is a solution of the inequality?
Oksana_A [137]
The first one is 6 and the second I is 0
3 0
4 years ago
Help!!!!! please!!!!!
defon

Answer:

The answer is option b.

<h2>144π</h2>

Step-by-step explanation:

Surface area of a sphere is 4πr²

where r is the radius

diameter = radius / 2

<h3><u>For Big </u><u>sph</u><u>ere</u></h3>

radius = 15 / 2 = 7.5in

Surface area = 4π(7.5)²

= 225π

<h3><u>Small </u><u>sph</u><u>ere</u></h3>

radius = 9/2 = 4.5in

Surface area = 4π(4.5)²

= 81π

Difference of the surface areas is

Surface area of big sphere - surface area of small sphere

Which is

225π - 81π

<h3>= 144π</h3>

Hope this helps you.

6 0
4 years ago
What is the difference between -6 and -3 on a number line?
Fofino [41]
The difference is +3.
You move from -6 to -5 to -4 to -3.
That’s 3 units of difference.
5 0
3 years ago
Read 2 more answers
The length of a rectangle is x feet. Its width is (x-7) feet. Draw and label a rectangle to represent this situation. Then write
a_sh-v [17]

Answer:

Perimeter of rectangle:

(4x - 14)\text{ feet}            

Step-by-step explanation:

We are given the following in the question:

Length of rectangle:

x\text{ feet}

Width of rectangle:

(x-7)\text{ feet}

Perimeter of rectangle:

2\times \text{(Length + Width)}

Expressions to calculate perimeter

1. ~2((x) + (x - 7))\text{ feet}\\2.~2(2x-7)\text{ feet}\\3.~ 4x-14\text{ feet}

The attached image shows the image of the rectangle.

3 0
3 years ago
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