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3 years ago

–3b + –9 = –3 what is b

Mathematics

2 answers:

Pavel [41]3 years ago

6 0

plz plz mark brainliest if it helps

nikitadnepr [17]3 years ago

5 0

<h3><u>Answer</u> :</h3>

Given that, <u>-3b + (-9) = (-3)</u>

We have to find value of b $.$

⭆ -3b + (-9) = (-3)

⭆ -3b - 9 = -3

⭆ -3b = -3 + 9

⭆ -3b = 6

⭆ 3b = -6

⭆ b = -6/3

⭆ b = -2 [Final answer]

<h3>Hope It Helps!</h3>

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3 years ago

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Generally the distribution of sales call made by a telesales representative follows a binomial distribution

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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 mean is mathematically represented as

$\mu = n* p$

=> $5= n * 0.15$

=> $n = 33$

Generally the least number of calls that need to be made by a representative for the probability of at least 1 sale to exceed 0.95 is mathematically represented as

$P( X \ge 1) = 1 - P( X < 1 ) > 0.95$

=> $P( X \ge 1) = 1 - P( X =0 ) > 0.95$

=> $P( X \ge 1) = 1 - [ ^{n}C_0 * (0.15 )^0 * (1- 0.15)^{n-0}] > 0.95$

=> $1 - [1 * 1* (0.85)^{n}] > 0.95$

=> $[(0.85)^{n}] > 0.05$

taking natural log of both sides

$n = \frac{ln(0.05)}{ln(0.85)}$

=> $n = 19$

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2 years ago