3 years ago

Explain how multiplying with 6 is like multiplying with 3

1 answer:

8 0

Multiplying with 6 is a mathematical process similar to multiplying with 3, in that setting up the greatest common factors between the two is easy due to the fact that 6 is a multiple of 3. As 6 is simply 3 doubled, any multiple of 6 will be the relative multiplation for 3 doubled.

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7. Evaluate 4P2 O 22 O 12 O 14 5

Reika [66]

Answer:

Step-by-step explanation:

To evaluate 4P2, we will use the permutation formula as shown;

nPr = $\frac{n!}{(n-r)!}$

4P2 = $\frac{4!}{(4-2!}$

$= \frac{4!}{2!} \\= \frac{4*3*2!}{2!}\\ = 4*3\\= 12$

4P2 = 12

5 0

3 years ago

In how many ways can 3person study groups beselected from a class of 25students?Note: nrn!r!(n-r)!nEnter

nlexa [21]

Answer:

2,300

Explanation:

This is given as:

$\begin{gathered} 25\text{ combination 3 represented as:} \\ ^nC_r=\frac{n!}{r!(n-r)!} \\ n=25 \\ r=3 \\ ^{25}C_3=\frac{25!}{3!(25-3)!} \\ ^{25}C_3=\frac{25\times24\times23\times22!}{3!\times22!} \\ ^{25}C_3=\frac{25\times24\times23}{3\times2\times1} \\ ^{25}C_3=2300 \end{gathered}$

Therefore, there are 2,300 ways that 3 persons can be selected from 25 people

8 0

1 year ago

Hedllloopp mee and u get brainlist!!!

nikitadnepr [17]

Answer:

15 cm (make sure to not put value with answer (cm))

Step-by-step explanation:

9x9 = 81

12x12 = 144

81+144 = 225

$\sqrt{225}$ = 15