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2 years ago

Solve the equation 3(4 + 3r)

1 answer:

5 0

The answer is 12+3r because 4 times 3=12 then the 3r which you cannot add because they are no others variables that are r

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There are 45 animals at the pet store. 12% are dogs, 24% are cats, 36% are fish, and 28% are other animals. Find the number of a

vivado [14]

Step-by-step explanation:

Dogs: 12% of 45= 5.4

Cats: 24% of 45= 10.8

Fish: 36% of 45= 16.2

Other: 28% of 45= 12.6

8 0

2 years ago

A certain cuty has 2700 pets. of these pets 1/4 are cats 1\5 are dogs 1/10 are horses 1/9 are frogs 1/4 are fish and the rest ar

andriy [413]

1/5 are dogs.

1/5 x 2700 = 540

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Answer: There are 540 dogs.
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4 0

2 years ago

A gambler has a coin which is either fair (equal probability heads or tails) or is biased with a probability of heads equal to 0

yawa3891 [41]

Answer:

(a) 0.1719

(b) 0.3504

Step-by-step explanation:

For every coin the number of heads follows a Binomial distribution and the probability that x of the 10 times are heads is equal to:

$P(x)=\frac{n!}{x!(n-x)!}*p^x*(1-p)^{10-x}$

Where n is 10 and p is the probability to get head. it means that p is equal to 0.5 for the fair coin and 0.3 for the biased coin

So, for the fair coin, the probability that the number of heads is less than 4 is:

$P(x$

Where, for example, P(0) and P(1) are calculated as:

$P(0)=\frac{10!}{0!(10-0)!}*0.5^0*(1-0.5)^{10-0}=0.0009\\P(1)=\frac{10!}{1!(10-1)!}*0.5^1*(1-0.5)^{10-1}=0.0098$

Then, $P(x$ , so there is a probability of 0.1719 that you conclude that the coin is biased given that the coin is fair.

At the same way, for the biased coin, the probability that the number of heads is at least 4 is:

$P(x\geq4 )=P(4)+P(5)+P(6)+...+P(10)$

Where, for example, P(4) is calculated as:

$P(4)=\frac{10!}{4!(10-4)!}*0.3^4*(1-0.3)^{10-4}=0.2001$

Then, $P(x\geq4 )=0.3504$ , so there is a probability of 0.3504 that you conclude that the coin is fair given that the coin is biased.

7 0

3 years ago

What is the answer to 50.28 divided by 4 (long division) PLEASE SHOW YOUR WORK

konstantin123 [22]

I can't show my work but::::: 12.57 is the answer

8 0

3 years ago

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Find the surface area. 6 ft 211 3 ft

san4es73 [151]

It is 36 feet because 6 times 2 times 3 =36

3 0

2 years ago

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