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2 years ago

Washing powder cost 12.87 for 9 kg. hwo much does 1 kg cost to the nearst cent

Mathematics

2 answers:

Goryan [66]2 years ago

5 0

Answer:

hard

Step-by-step explanation:

I don't know because I have never learnt these things

Sav [38]2 years ago

4 0

Answer:

$1.43$

Step-by-step explanation:

9kg -------> 12.87

1kg ---------> x

let the unknown number be x

$9 = 12.87 \\ 1 = x \\ use \: \: cross \: \: multipication \\ 9x = 12.87 \\ \frac{9x}{9} = \frac{12.87}{9} \\ x = 1.43$

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Answer:

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2 years ago

Suppose that 80% of all trucks undergoing a brake inspection at a certain inspection facility pass the inspection. Consider grou

Gwar [14]

Answer:

P=0.147

Step-by-step explanation:

As we know 80% of the trucks have good brakes. That means that probability the 1 randomly selected truck has good brakes is P(good brakes)=0.8 . So the probability that 1 randomly selected truck has bad brakes Q(bad brakes)=1-0.8-0.2

We have to find the probability, that at least 9 trucks from 16 have good brakes, however fewer than 12 trucks from 16 have good brakes. That actually means the the number of trucks with good brakes has to be 9, 10 or 11 trucks from 16.

We have to find the probability of each event (9, 10 or 11 trucks from 16 will pass the inspection) . To find the required probability 3 mentioned probabilitie have to be summarized.

So P(9/16 )= C16 9 * P(good brakes)^9*Q(bad brakes)^7

P(9/16 )= 16!/9!/7!*0.8^9*0.2^7= 11*13*5*16*0.8^9*0.2^7=approx 0.02

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P(11/16)=16!/11!/5!*0.8^11*0.2^5=13*21*16*0.8^11*0.2^5=approx 0.12

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2 years ago

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3 years ago

Read 2 more answers

The constant of ________ is the value that relates two variables that are directly proportional or inversely proportional.

krok68 [10]

The constant of proportion is the value that relates two variables that are directly proportional or inversely proportional.

Option B is correct!!~

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2 years ago