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iris [78.8K]
3 years ago
13

In how many ways 4 books can be chosen from 8 different books and be arranged in 4 spaces on a bookshelf? ​

Mathematics
1 answer:
Trava [24]3 years ago
5 0

Answer:

hope this helps

Step-by-step explanation:

3*2 * 1 = 24 ways . It is called arrangement or permutations, while if you need to group some objects it is called combination and there we need to consider unique groups only.

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When the crispy treats have cooled Mrs. Williams cut theme into 30 equal pieces and she give 2/5 to her son and takes the rest t
stiv31 [10]

Answer: Mrs, William takes 18 treats to school.


Step-by-step explanation:

Given: When the crispy treats have cooled Mrs. Williams cut theme into 30 equal pieces .

She give 2/5 to her son, then the number of treats ahe give to her son = \frac{2}{5}30=12

Then, the number of treats Mrs. Williams take to school =30-12=18

Hence, Mrs, William takes 18 treats to school.

6 0
3 years ago
Birth control pills have a theoretical annual efficacy of 99.5%, but a real-worls efficacy of only 95%. If a college student tak
shutvik [7]

Answer:In my opinion B.0.005 is the correct answer

Step-by-step explanation:

hope it will help you

3 0
3 years ago
What is 532.60 × 8.53 with work included?
zalisa [80]

        532.60

        x   8.53

--------------------------------

          159780

+      2663000

     42608000

---------------------------

      4543.0780

6 0
3 years ago
If 21 is added to a number, the result is 41 less than twice the number. Find the number.
TEA [102]

Answer: 62

Step-by-step explanation: Set up your equation

  1. 21+x=2x-41 because the number (x) that 21 is added to is 41 <em>less than</em> (so subtraction) <em>twice </em>(so multiply the number x by 2) the number (x).
  2. Get the x's on one side by subtracting the single x
  3. 21=x-41
  4. Now add 41 to both sides to completely isolate x
  5. 62=x
  6. So, your answer is x=62. The number is 62.

Check your work. 62+21=83. 2(62)= 124. 124-41=83. Both equations equal 83, so the solution is correct.

5 0
3 years ago
Use the Distributive Property to simplify
Anon25 [30]

well what i got was:

the exact form: 233/28

decimal form: 7.96428571...

mixed number form: 7 27/28

not sure if this is right at all but i hope it helps at least a little

8 0
3 years ago
Read 2 more answers
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