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3 years ago

8

A bag contains the following marbles: 4 black marbles, 14 blue marbles, 8 brown marbles, and 20 green marbles. What is the ratio

of blue marbles to brown marbles?
Express your ratio as a fraction or with a colon

1 answer:

Diano4ka-milaya [45]3 years ago

3 0

Answer:

14/8 or 14:8

Step-by-step explanation:

blue:brown=14:8

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Ishaan is 72 years old and William is 4 years old. How many years will it take until Ishaan is only 5 times as old as William?

KiRa [710]

72+x=5(4+x) solve for x.

4 0

3 years ago

The life, in years, of a certain type of electrical switch has an exponential distribution with an average life β=44. If 100 o

Bond [772]

Answer:

0.9999

Step-by-step explanation:

Let X be the random variable that measures the time that a switch will survive.

If X has an exponential distribution with an average life β=44, then the probability that a switch will survive less than n years is given by

$\bf P(X$

So, the probability that a switch fails in the first year is

$\bf P(X$

Now we have 100 of these switches installed in different systems, and let Y be the random variable that measures the the probability that exactly k switches will fail in the first year.

Y can be modeled with a binomial distribution where the probability of “success” (failure of a switch) equals 0.0225 and

$\bf P(Y=k)=\binom{100}{k}(0.02247)^k(1-0.02247)^{100-k}$

where

$\bf \binom{100}{k}$ equals combinations of 100 taken k at a time.

The probability that at most 15 fail during the first year is

$\bf \sum_{k=0}^{15}\binom{100}{k}(0.02247)^k(1-0.02247)^{100-k}=0.9999$

3 0

3 years ago

72 rolls,into 2 equal groups of 3/5

Alecsey [184]

<span>So, (72)(3/8) = 27, and 72-27 = 45 must go in the second group.</span>

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3 years ago

Pat is 20 years older than his son Patrick. In 6 years Pat will be twice as old as Patrick. How old are they now?

ohaa [14]

Pat is 38 and patrick is 18 years old

3 0

3 years ago

Read 2 more answers

Anyone know this answer?

Tasya [4]

Answer:

16

Step-by-step explanation:

Remember to use pemdas:

8÷2(2+2)

First we do whats in parentheses.

= 8÷2(4)

Then we do multiplication and division from left to right

= 4(4)

= 16

So the answer is 16. Remember that multiplication and division have the same priority in pemdas, and you should always do them left to right, because order does matter.

6 0

3 years ago