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2 years ago

In how many ways can a password be made using four letters from the 26 letter English alphabet letters can’t be repeated

Mathematics

1 answer:

valentinak56 [21]2 years ago

7 0

Answer:

If you go by normal method, no. of possible passwords that can be created with 26 alphabets are 26X26X26X26 = 456,976

Step-by-step explanation:

. If you do not want to repeat the alphabets, you can use combinations. i.e. C(26, 4) or 26C4 = 358,800 ways

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4. Line t and AECA and AFDB are shown on the coordinate plane

julia-pushkina [17]

Answer:

A, B, C, E

Step-by-step explanation:

It can be seen from the figure that the points A, B, C and D, all are lying in the line t.

=> So that it can be concluded that AC and BC and BD have the slopes which are equal to each other and also equal to the slop of line t

So that all answer A, B, C are true.

In addition, as FD is parallel with x - axis, so that slope of the line t is equal to tan angel FDB

As FDB is the right triangle with BFD = 90°

=> tan angel FDB = FB/ FD (tan of an acute angel in the right triangle = opposite side/ adjacent side)

=> Slope of the line t is equal to FB/ FD

=> Answer E is true

6 0

2 years ago

Read 2 more answers

7 2/15 + 5 2/3 +9 13/15=?? A:20 3/2 B:21 2/3 C:21 10/15 D:22 2/3

nikdorinn [45]

22.6666666667, in other words D. 22 2/3

6 0

3 years ago

Read 2 more answers

A. 36*6*6*6 B. 6*5 C. 25*5*5*5 D. 125*125

mel-nik [20]

5^6= 15625
A= 7776
B= 30
C= 3125
D= 15625
Answer: D

7 0

2 years ago

Is(0,-2) a solution of x+y=6

sergiy2304 [10]

Answer:

Step-by-step explanation:

x+y=6

Substitute the point into the equation and see if it is true

0 + -2 = 6

-2 =6

This is not true so the point is not a solution

4 0

2 years ago

Read 2 more answers

I need help with #10!

DiKsa [7]

Answer: 6 years old.

Step-by-step explanation:

For this exercise let "x" represents your present age.

According to the information provided in the exercise, you know that In three years, Chad will be three times your present age.

Then, your age in three years can be represented with the following expression:

$x+3$

Knowing at that time Chad's age will be three times yours and you will be half as old as old as Chad, you can write the following equation to represent this situation:

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

Therefore, the final step is to solve for "x" in order to find its value.

You get that this is:

$2(x+3)=3x\\\\2x+6=3x\\\\6=3x-2x\\\\x=6$

7 0

2 years ago