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natulia [17]
4 years ago
14

a book store is having a 30% off sale.diary of a wimpy kid books are now $6.30 each. what was the oringal price of the books

Mathematics
2 answers:
Anika [276]4 years ago
8 0
100% - 30% = 70%
70% = 0.7

6.30 / 0.7 = $9

answer: <span>original price of the books were $9</span>
timurjin [86]4 years ago
4 0

Answer:

$9

Step-by-step explanation:

100% - 30% = 70%, so now we only found one part of the question we have to divide 6.30 by 70 which is 9. Now original price of the books is $9.00.

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subtract -14 from both sides

-54=-18n

divide both sides by -18


3 = n


3 0
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Explain how to work out these type of questions please!
bixtya [17]

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True

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A manufacturer of televisions subjects the equipment to a comprehensive testing process for all essential functions before the t
Scorpion4ik [409]

Answer:

The probability is   P(X \le 9) =0.9138

Step-by-step explanation:

From the question we are told that

   The probability of the television passing the test is  p = 0.95

    The sample size is  n  =  10

Generally the comprehensive testing process for all essential functions  follows a binomial distribution  

i.e  

         X  \~ \ \ \  B(n , p)

and the probability distribution function for binomial  distribution is  

      P(X = x) =  ^{n}C_x *  p^x *  (1- p)^{n-x}

Here C stands for combination hence we are going to be making use of the combination function in our calculators      

    Generally the probability that at least 9 pass the test is mathematically represented as

     P(X \le 9) =  P(X = 9) + P(X = 10 )

=>  P(X \le 9) = [^{10}C_9 *  (0.95)^9 *  (1- 0.95)^{10-9}]+ [^{10}C_{10} *  {0.95}^{10} *  (1- 0.95)^{10-10}]

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=> P(X \le 9) =0.9138

8 0
3 years ago
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