1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ArbitrLikvidat [17]
3 years ago
12

Television and radio stations use four call letters starting with w or​ k, such as wxyz or krld. assuming no repetitions in the

second to fourth​ letters, how many​ four-letter sets are possible using either w or k and only the letters upper f to upper x​? ​(count all possibilities even​ though, practically, some may be​ inappropriate.)
Mathematics
1 answer:
katen-ka-za [31]3 years ago
4 0
Here we are dealing with combinations without repetitions.

Let's write the form of a name.
For names starting with W:
W _ _ _
For names starting with K:
K _ _ _

We are allowed to use only lettrs from F to X. That's total of 19 letters. We are not allowed to repeat letters so for each letter we can choose from one less available letters.

Let's start with names begining with W. We will write how man possible letters we can choose from.
W 18 17 <span>16
</span>At second possition we can choose from 18 letters because we must not repeat letters and W is placed in front of X in alphabet.
At third position we can choose from 17 letters becasue we already chose two of 19 possible letters.
At fourth position we can choose from 16 letters becasue we already chose three of 19 possible letters.
To calculate total number of possible names we need to multiply these numbers:
1 * 18 * 17 * 16 = 4896

Same calculation can be done for names starting with K. We would get same number as solution.

Total number of possible names starting with W or K is 4896 + 4896 = 9792
You might be interested in
Activity 2
Vsevolod [243]
The unknown is 2% and sorry
7 0
3 years ago
Can someone help me on number 8. I tried to do it, but I can’t seem to find the right answer.
qaws [65]

Check the picture below.

4 0
3 years ago
I need to know the amount of Iodine -131 remaining after 72 days
jenyasd209 [6]

Answer:

131 remaining after 72 days

Step-by-step explanation:


4 0
3 years ago
Given the two expressions below: 1) 4x2 − 8x + 9 2) 3x2 + 2y + 6 Is the sum of the two expressions above a polynomial? Why or wh
Mkey [24]
Sum of polynomials are always polynomials.

Note that despite it's name, single constants, monomials, binomials, trinomials, and expressions with more than three terms are all polynomials.
For example,
0, &pi; sqrt(2)x, 4x+2, x^2+3x+4, x^2-x^2, x^5+x/ &pi; -1
are all polynomials.

What makes an expression NOT a polynomial?
Expressions that contain non-integer or negative powers of variables, rational functions, infinite series.
For example,
sqrt(x+1), 1/x+4, 1+x+ x^2/2!+x^3/3!+x^4/4!+...., (5x+3)/(6x+7)
are NOT polynomials.

8 0
3 years ago
Find the area of the following figure. Explain how you found your answer.
iragen [17]

Answer:

Below

Step-by-step explanation:

Let's say that each square on the grid represents 1 cm

First find the area of the two triangles

For the larger one: A = bh/2

A = 3 x 3 / 2

  = 4.5 cm^2

For the smaller one : A = bh/2

A = 2 x 2 / 2

   = 2 cm^2

For the rectangle : A = lw

A = 4 x 5

   = 20 cm^2

Add them all up to get the area

4.5 + 2 + 20 = 26.5 cm^2

Hope this helps!

5 0
3 years ago
Read 2 more answers
Other questions:
  • What are the zeros of this function
    15·1 answer
  • Simplify completely (x^2+x-12)/(x^2-x-20)÷(3x^2-24+45)/(12x^2-48x-60)
    5·1 answer
  • What is the inverse function of v(x) = 2/3 x - 1/6
    12·1 answer
  • What kind of problem is this
    7·2 answers
  • Last week Isaiah and his roommates ate 3/8 of a carton of yogurt, and this week they ate
    11·1 answer
  • The yearly cost in dollars, y, at a video game arcade based on total game tokens purchased, x, is y = x + 60 for a member and y
    9·1 answer
  • 3. 3(2x - 1) + 4 = 3 - 5(1 - x)<br><br>​
    11·2 answers
  • When Dylan checks their school lunch account, the
    10·1 answer
  • <img src="https://tex.z-dn.net/?f=1%20-%2025x%20%7B%7D%5E%7B2%7D%20" id="TexFormula1" title="1 - 25x {}^{2} " alt="1 - 25x {}^{2
    14·1 answer
  • Can someone please answer the question in the photo attached below for me :) i would really appreciate it and i will also mark b
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!