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3 years ago

What is the exponent of 20

Mathematics

2 answers:

frutty [35]3 years ago

6 0

The answer to this is 0

Ilia_Sergeevich [38]3 years ago

4 0

I think it is 0 because I googled it.

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In a shop for every pant there are 3 shirts and for every 9 shirts there are 27 pairs of shoes. Express the ratio of pants to sh

gavmur [86]

Answer:

1 : 3 : 9

Step-by-step explanation:

For every Pant = 3 shirts

Pant = x ; shirt = 3x

For :

Every 9 shirts = 27 pairs of shoes

Simplifying further :

1 shirt = 3 pairs of shoes

3 shirts = 3 * 3 = 9 pairs of shoes

Expressing as ratio:

1 Pant = 3 shirts = 9 pairs of shoes

1 : 3 : 9

5 0

3 years ago

A tennis tournament has 2n contestants. We want to pair them up for the first round of singles matches. Show that the number of

ddd [48]

There are

$\dbinom{2n}2 = \dfrac{(2n)!}{2! (2n-2)!}$

ways of pairing up any 2 members from the pool of $2n$ contestants. Note that

$(2n)! = 1\times2\times3\times4\times\cdots\times(2n-2)\times(2n-1)\times(2n) = (2n-2)! \times(2n-1) \times(2n)$

so that

$\dbinom{2n}2 = \dfrac{(2n)\times(2n-1)\times(2n-2)!}{2! (2n-2)!} = \boxed{n(2n-1)}$

4 0

2 years ago

The straight line joining points A(p,3) and B(1,-1) has length 5, workout the value of p

Alborosie

Answer:

d^2 = <y2-y1>^2 + <x2 -x1) ^2

p =4

7 0

2 years ago

Find −914+27. Write your answer as a fraction in simplest form.

vfiekz [6]

Answer:

- +=_

914-27=887

887 answer this fraction

5 0

4 years ago

Describe and correct the error in solving the proportion?

Ilia_Sergeevich [38]

Answer: Choice B

They did not perform the cross multiplication properly

The correct step should be m*24 = 8*15 which solves to m = 5

========================================================

Explanation:

In general, if we had the equation A/B = C/D, then it cross multiplies to A*D = B*C. We refer to this as cross multiplication because of the shape made when we connect the terms (to figure out what multiplies with what). The diagram below shows what I mean.

So that's why m/8 = 15/24 cross multiplies to m*24 = 8*15

Simplifying things a bit leads to 24m = 120. Then we divide both sides by 24 to fully isolate m and we get m = 120/24 = 5. Therefore, m = 5.

7 0

3 years ago