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2 years ago

One number is 4 greater than another. The product of the numbers is 21. Find the numbers.

Mathematics

1 answer:

kotykmax [81]2 years ago

3 0

Answer:

7 and 3 are two numbers that work

Step-by-step explanation:

7-3=4

7×3=21

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The random variable X is exponentially distributed, where X represents the time it takes for a person to choose a birthday gift.

garik1379 [7]

Answer:

The probability that X is less than 32 minutes is 0.736.

Step-by-step explanation:

Given : The random variable X is exponentially distributed, where X represents the time it takes for a person to choose a birthday gift. If X has an average value of 24 minutes.

To find : What is the probability that X is less than 32 minutes?

Solution :

If X has an average value of 24 minutes.

i.e. $\lambda=24$

The random variable X is exponentially distributed, where X represents the time it takes for a person to choose a birthday gift.

The exponentially function is $\frac{1}{\lambda}e^{-\frac{x}{\lambda}}$

The function form according to question is

$f(x)=\{\frac{1}{24}e^{-\frac{x}{24}}, x>0\}$

The probability that X is less than 32 minutes is

$P[x$

Therefore, the probability that X is less than 32 minutes is 0.736.

7 0

2 years ago

An elephant went 119 km moving 42 km/h how many hours did the journey take?

Luden [163]

Answer:

1 HR ---> 42 km

? .----> 119 km

119 * 1/42

2.833

8 0

1 year ago

Read 2 more answers

What percent of 4 is 1?

Flauer [41]

Lets take 100 and divide it by 4 to get 25, this means that 1 first part of 100 is 25 these means that the porcentage of 1 in 4 is 25%

Hope this helps

8 0

3 years ago

What is the coefficient of x in expansion of (2x-4)^2 ?

Sunny_sXe [5.5K]

Answer:

Step-by-step explanation:

the one which is near to x

8 0

2 years ago

Find the HCF and LCM of: x^3+27,2x^3-6x^2+18x,x^2-3x+9

r-ruslan [8.4K]

Answer:

hcf:3x^3-6x^2+y^2-3x+54

lcm:2(x+3)(x^2-3x+9)(x^3-3x^2+9)(y^2-3x+9)

7 0

2 years ago