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Blababa [14]
3 years ago
12

NEED HELP RN!!!!!

Mathematics
1 answer:
Kazeer [188]3 years ago
4 0

Answer:

4(2n-5)

Step-by-step explanation:

So we know Valerie has 5 less than double the number of brad's books. Brad has n books, so make that 2n to double it.

Because she has 5 less than that, the expression is now 2n-5. The is the total of Valerie's books.

We know that Brad has 4 times the number of Valerie's books, so just multiply that expression by 4.

The final answer is 4(2n-5).

You're welcome. :)

You might be interested in
A simple die is thrown 100 times and the number five appears 14 times. Find the experimental probability of throwing a five, giv
mario62 [17]

Answer:

The experimental probability of throwing a five is 0.087.

Step-by-step explanation:

Given:

Number of trials (n) = 100

Number of times 5 appears (x) = 14

Let the event of occurrence of 5 be success and the probability represented by 'p'. So, all the other numbers occurrence is failure and its probability is represented as 'q'.

Probability of success is given as:

p=\frac{Number\ of\ favorable\ events}{Total\ number\ of\ outcomes}

Favorable event is occurrence of 5. So, its number is 1 as there is only one 5 in the die. Total outcomes are 6 as there are six numbers. So,

p=\frac{1}{6}

Now, probability of failure is given by the formula:

q=1-p=1-\frac{1}{6}=\frac{5}{6}

Now in order to find the experimental probability of 14 successes out of 100 trials, we apply Bernoulli's theorem which is given as:

P(x) = ^nC_xp^xq^{n-x}

Plug in all the given values and find the probability of 14 successes. This gives,

P(x=14)=^{100}C_{14}(\frac{1}{6})^{14}(\frac{5}{6})^{100-14}\\\\P(x=14)=0.087

Therefore, the experimental probability of throwing a five is 0.087.

8 0
3 years ago
Need help with this question I got it wrong ​
Zinaida [17]
I think it’s 1/2. i’m not sure though sorry
7 0
2 years ago
Read 2 more answers
Holly bought blank CD's and spent $34.57.What is that amount rounded to the nearest dollar?.
Tamiku [17]

Answer:

$35

Step-by-step explanation:

Rounding to the nearest dollar which would be 4 so in that case you would use the 5 in .57 and because 5 is a large number it would make the 4 into a five thus making it $35. Hope this helped :)

3 0
2 years ago
Please help me someone
Jobisdone [24]

Answer: itz d plz trust me

4 0
2 years ago
Help please thank you
Artemon [7]
The answer is Yes, no, yes, no
7 0
2 years ago
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