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lisov135 [29]
3 years ago
11

What is the solution set of 2x2+x=15?

Mathematics
2 answers:
vodomira [7]3 years ago
7 0
4+x=15
---> x=15-4
---> x=11
Alexeev081 [22]3 years ago
5 0

Answer:

5/2,-3

Step-by-step explanation:

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UkoKoshka [18]

Answer:

The probability that 8 mice are​ required is 0.2428.

Step-by-step explanation:

Given : A scientist inoculates​ mice, one at a​ time, with a disease germ until he finds 3 that have contracted the disease. If the probability of contracting the disease is two sevenths.

To find : What is the probability that 8 mice are​ required? The probability that that 8 mice are required is nothing ?

Solution :

Applying binomial distribution,

P(X=r)=^nC_r p^rq^{n-r}

Where, p is the probability of success p=\frac{2}{7}

q is the probability of failure q=1-p, q=1-\frac{2}{7}=\frac{5}{7}

n is total number of trials n=8

r=3

Substitute the values,

P(X=3)=^8C_3 (\frac{2}{7})^3 (\frac{5}{7})^{8-3}

P(X=3)=\frac{8!}{3!5!}\times \frac{8}{343}\times (\frac{5}{7})^{5}

P(X=3)=\frac{8\times 7\times 6}{3\times 2\times 1}\times \frac{8}{343}\times \frac{3125}{16807}

P(X=3)=0.2428

Therefore, the probability that 8 mice are​ required is 0.2428.

5 0
3 years ago
Find the other perimeter
damaskus [11]

Answer:

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Step-by-step explanation:

6+10+ (3.14×8)/2

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7 0
2 years ago
the mall is 84 meters long. the post office is 38 meters long. how much longer is the mall than the post office
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Step-by-step explanation:

length of mall=84m

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Answer:

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Step-by-step explanation:

Well, I don't know if there should be a picture of the problem that should go with the question. But a trick for solving distributive property is to use the trick PEMDAS In order.

For Example:

P-Paraenthese

E-Exponent

M-Multiply

D-Divide

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NOTE!

Remember to always Multiply and divide BEFORE adding and subtracting.

Hoped this helped!

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Two cities are 45 miles apart. Two trains, with speeds of 70 mph and 60 mph, leave the two cities at the same time so that one i
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