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Anastasy [175]
3 years ago
12

2x^2-20x+100 quadratic formula

Mathematics
1 answer:
ArbitrLikvidat [17]3 years ago
7 0

Answer:10

Step-by-step explanation:

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In how many ways can you select two people from a group of 15 if the order of selection is not important?
Anna35 [415]

Answer:

105 ways

Step-by-step explanation:

Because the order of selection does not matter, we know that we will be using a combination instead of a permutation.

₁₅C₂ = 15! / (2! * 13!)

= 15 * 14 * ... * 2 * 1 / 2 * 1 * 13 * 12 * ... * 2 * 1

= 15 * 14 / 2 * 1 (The 13! cancels out)

= 105

8 0
3 years ago
Read 2 more answers
Salina has a rope that is 9 feet long. How many pieces can she cut from the rope so that each piece is 1/3 foot long?
stepan [7]

Answer:

27

Step-by-step explanation:

Each foot of rope can make 3 pieces of 1/3 feet length

1 feet of rope = 3 pieces

There are 9 feet of rope

3 pieces x 9 feet = 27 pieces

So you can make 27 pieces

6 0
4 years ago
Read 2 more answers
Given that cy = 6, dy = 12, and by = 9. which is the length of ay?
myrzilka [38]
<span>In order to be able to provide appropriate answer you would have to attach the image of the geometric shape in order to find the length of ay. If you provide the image of the problem it would be of great help to solve it.

I hope it helps, Regards.</span>
3 0
4 years ago
What is the value of 3A+6|C|<br><br> A. 63<br> B. 27<br> C. -63<br> D. 9
Gnom [1K]

Answer:

3×(-9)+6+(-6)

(-27)+6+(-6)

-27

7 0
4 years ago
Evaluate each expression. (25^-3/2)^1/3
julsineya [31]

The result can be shown in multiple forms.

Exact Form:

1 /5

5

Decimal Form:

0.2

7 0
3 years ago
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