All categories

3 years ago

How many 5-digit numbers can be formed using the digits 1, 2, 3, 4, 5, 6, 7 if repetition of digits is not allowed?

Mathematics

1 answer:

UNO [17]3 years ago

3 0

Answer:

2520

Step-by-step explanation:

7×6×5×4×3 = 2520

Imagine □□□□□

For the 1st □, there are 7 choices

For the 2nd □, there are 6 choices (since 1 out of the 7 numbers is already used)

For the 3rd □, there are 5 choices (since 2 out of the 7 numbers are used)

And so on...

You might be interested in

M Hurry answer it’s due today

omeli [17]

Answer:

83.55

Step-by-step explanation:

i think

5 0

3 years ago

Which expression is equal to (x-3)(x-2)/(x+3)(x-3)

Tju [1.3M]

Answer:

$\frac{x-2}{x+3}$

Step-by-step explanation:

given $\frac{(x-3)(x-2)}{(x+3)(x-3)}$

the factor (x - 3) can be cancelled from the numerator/ denominator leaving

$\frac{x-2}{x+3}$

3 0

3 years ago

5/7 ............. 15/21 NONE OF THESE EQUAL GREATER THAN LESS THAN

sertanlavr [38]

Answer: EQUAL

Step-by-step explanation:

Just as you can do the same thing to both sides of an equation, you can do the same thing to both sides of a fraction. 15 = 5*3 and 21 = 7*3. Thus, 5/7=15/21

Hope it helps <3 :)

5 0

3 years ago

5. Sean has 56 bills in his pockets. The bills are only fives and tens.

noname [10]

Answer:

He have 43 bills of 10 and 13 bills of 5

Step-by-step explanation:

5x + 10y = 495

x + y = 56

Isolate x:

x = 56 - y

Substitute in the first equation:

5(56 - y) +10y = 495

280 -5y +10 y = 495

5y = 495 -280

5y = 215

y = 215/5

y= 43

Now substitute the value of y to find x:

x = 56 - y

x = 56 - 43

x = 13

3 0

2 years ago

Byron scrambled 8 dozen eggs for the campers. What is the total number of eggs Byron scrambled

dusya [7]

The answer you are look for is 96

A dozen of eggs =12
He scramble 8 of a dozen

12•8=96

6 0

3 years ago