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4 years ago

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What does n equal in this equation? n+4/-2=-9

1 answer:

myrzilka [38]4 years ago

7 0

So basically you just want to isolate the variable. So you want n on a side all by itself. so first you multiply by -2 to both sides, that will leave you with the equation n+4=18, then you subtract 4 from both sides, this will give you the equation n=14. To make sure this solution is correct, you can plug it back into the equation filling 14 in for n, this equation is 14+4/-2=-9, and this solution works. Hope this helped :)

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xeze [42]

Answer: 1. 0.0256

2. 0.4096

Step-by-step explanation:

Binomial probability formula , to find the probability of getting x successes:

$P(x)=^nC_xp^x(1-p)^{n-x}$ , where n= Total number of trials

p= Probability of getting success in each trial.

Let x be the number of customers will make purchase.

As per given , we have

p= 0.20

n= 4

1. The probability that 3 of the next 4 customers will make a purchase will be:-

$P(x=3)=^4C_3(0.20)^3(1-0.20)^{4-3}$

$P(x=3)=(4)(0.20)^3(0.80)^{1}\ \ [\because\ ^nC_{n-1}=n]$

$P(x=3)=(4)(0.008)(0.80)=0.0256$

Hence, the probability that 3 of the next 4 customers will make a purchase = 0.0256

2. The probability that none of the next 4 customers will make a purchase will be :

$P(x=0)=^4C_0(0.20)^0(1-0.20)^{4-0}$

$P(x=0)=(1)(0.80)^{4}\ \ [\because\ ^nC_{0}=1]$

$P(x=0)=0.4096$

Hence, the probability that none of the next 4 customers will make a purchase= 0.4096

5 0

3 years ago

In 2005 there were 1352 students in 2006 there were 1014 students work out the decrease in the number of students

Eduardwww [97]

I’m. It sure but I need points so sorry

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3 years ago

Water stations will be placed every 600 meters of a fifteen kilometer race how many water stations will be needed

zaharov [31]

15 km = 15,000 m
every 600 m, there is one water station (starting point at 600 m)
number of stations needed : 15000/600 = 25 water stations

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3 years ago

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ivanzaharov [21]

Answer:

176

Step-by-step explanation:

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12x11=132

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3 years ago

Read 2 more answers

How do you simplify 40/71

uysha [10]

Answer:

40/71

Step-by-step explanation:

Because 71 is prime so there is no other way to simplify

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3 years ago