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3 years ago

The number √21 is a __ number because _

Mathematics

1 answer:

Misha Larkins [42]3 years ago

5 0

Answer:

composite number

Step-by-step explanation:

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Our club has 25 members, and wishes to pick a president, secretary, and treasurer. In how many ways can we choose the officers,

Rus_ich [418]

Answer:

13800

Step-by-step explanation:

The order of the members is important (because each selected member will receive a different position), thus we then need to use the definition of permutation.

There are 25 members, of which 3 are selected.

$\begin{array}{l}n=25 \\r=3\\end{array}$

Evaluate the definition of a combination:

$P(25,3)=\frac{25 !}{(25-3) !}=\frac{25 !}{22 !}=25 \cdot 24 \cdot 23=13800$

8 0

3 years ago

And rates: word problems ZB9

asambeis [7]

Answer:

10 mins

Explanation:

Because it takes 2 minutes to fill a 30 gal pool, and 150/30=5, 2 x 5 = 10 giving you the answer of 10 mins to fill a 150 gal pool.

6 0

3 years ago

For a field trip 11 students rode in cars and the rest filled eight buses. Which equation below will help you find how many stud

Helen [10]

Answer:

8x + 11= 315

Step-by-step explanation:

Let x = the number of students in a bus

There are 8 buses

8x is the number of students in buses

There are 11 students in cars

Add this together to get all the students, which is 315

8x + 11= 315

6 0

3 years ago

Read 2 more answers

(20 points and brainliest) Which table best classifies the following numbers as rational and irrational? negative 4 over 5., squ

Mademuasel [1]

Answer:

Step-by-step explanation:

cant tell what goes with which chart....but I can do this,..

negative 4 over 5 .......rational

sqrt 2....irrational

2.5.....rational

0.4 bar.....irrational

sqrt 16....rational

8 0

3 years ago

10-root18/root2 = a+broot2

Sauron [17]

Step-by-step explanation:

$\frac{10 - \sqrt{18} }{ \sqrt{2} } = a + b \sqrt{2}$

$\frac{10}{ \sqrt{2} } + \frac{ - \sqrt{18} }{ \sqrt{2} }$

$5 \sqrt{2} + ( \frac{ - \sqrt{18} }{ \sqrt{2} } ) \times \sqrt{2}$

$a = 5 \sqrt{2}$

$b = \frac{ - \sqrt{18} }{ \sqrt{2} }$

8 0

3 years ago

The number √21 is a ____ number because ___

The number √21 is a __ number because _