3 years ago

How many 2 digit numbers can be formed using 9,2,6,4,8,5,7 without repetition

Mathematics

1 answer:

-BARSIC- [3]3 years ago

5 0

There are 7 numbers.

Each number can be paired with the remaining 6 numbers.

7 x 6 = 42 different two digit numbers can be made.

You might be interested in

Given the following matrices, what 3 elements make up the first column of the product matrix DA?

Misha Larkins [42]

We have to figure out what the product of DA is,

$\begin{bmatrix}-1&2&3\\8&-4&0\\6&7&1\\ \end{bmatrix}\begin{bmatrix}1\\3\\5\\ \end{bmatrix}=\begin{bmatrix}a\\b\\c\\ \end{bmatrix}$

We know that,

$\begin{bmatrix}a&b&c\\d&e&f\\g&h&i\\\end{bmatrix}\begin{bmatrix}x\\y\\z\\\end{bmatrix}=\begin{bmatrix}ax+by+cz\\dx+ey+fz\\gx+hy+iz\\\end{bmatrix}$

So,

$a=-1\cdot1+2\cdot3+3\cdot5=-1+6+15=20$

$b=8\cdot1+(-4)\cdot3+0\cdot5=8-12=-4$

$c=6\cdot1+7\cdot3+1\cdot5=6+21+5=32$

So the solution is,

$a,b,c=\boxed{20,-4,32}$

Hope this helps :)

4 0

3 years ago

3x=3(3x+1)<br> x=(3x+1)<br> -2x=1<br> x=- 1/2

Gemiola [76]

You got the equation correct

6 0

3 years ago

How do you find the derivative of 4

Nutka1998 [239]

by rule the derivative of a constant is 0

so the answer for this is 0

5 0

3 years ago

Find a pattern for each sequence 0,1, 0.01, 0.001,.....

Ghella [55]

Answer:

Divided by 10 every time

Step-by-step explanation:

/10 is the pattern

8 0

2 years ago

The answer is 35% please try me I want to help other people out

Vlad [161]

35 percent is the answer to ur problem sir

5 0

3 years ago

How many 2 digit numbers can be formed using 9,2,6,4,8,5,7 without repetition​

How many 2 digit numbers can be formed using 9,2,6,4,8,5,7 without repetition