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4 years ago

4(f−6) plz help thank u

Mathematics

2 answers:

german4 years ago

8 0

You will times the F then what ever the F equals, subtract it by 6

Arada [10]4 years ago

3 0

Multiply the y by 4 then the -6 by 4

4f - 24

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A major credit card company has determined that customers charge between $100 and $1100 per month. If the monthly amount charged

Alexxx [7]

Answer:

a) $E(X) = \frac{a+b}{2} = \frac{100+1100}{2}=600$

b) First we need to calculate the variance given by this formula:

$Var(X) = \frac{(b-a)^2}{12}= \frac{(1100-100)^2}{12} = 83333.33$

And the deviation would be:

$Sd(X) = \sqrt{83333.33}= 288.675$

c) $P(600 < X< 889) = P(X$

And using the cdf we got:

$P(600 < X< 889)= F(889) -F(600) = \frac{889-100}{1000} -\frac{600-100}{1000}= 0.789- 0.5= 0.289$

d) $P(311 < X< 889)= F(889) -F(311) = \frac{889-100}{1000} -\frac{311-100}{1000}= 0.789- 0.211= 0.578$

Step-by-step explanation:

For this case we define the random variable X who represent the customers charge, and the distribution for X on this case is:

$X \sim Unif (a= 100, b=1100)$

Part a

For this case the average is given by the expected value and we can use the following formula:

$E(X) = \frac{a+b}{2} = \frac{100+1100}{2}=600$

Part b

First we need to calculate the variance given by this formula:

$Var(X) = \frac{(b-a)^2}{12}= \frac{(1100-100)^2}{12} = 83333.33$

And the deviation would be:

$Sd(X) = \sqrt{83333.33}= 288.675$

Part c

For this case we want to find the percent between 600 and 889, so we can use the cumulative distribution function given by:

$F(x) = \frac{X -100}{1100-100}= \frac{x-100}{1000}, 100 \leq X \leq 1100$

And we can find this probability:

$P(600 < X< 889) = P(X$

And using the cdf we got:

$P(600 < X< 889)= F(889) -F(600) = \frac{889-100}{1000} -\frac{600-100}{1000}= 0.789- 0.5= 0.289$

Part d

$P(311 < X< 889) = P(X$

And using the cdf we got:

$P(311 < X< 889)= F(889) -F(311) = \frac{889-100}{1000} -\frac{311-100}{1000}= 0.789- 0.211= 0.578$

6 0

3 years ago

April colored 12 out of the 16 total pages in her coloring book to find the percentage of the total number of pages that April h

san4es73 [151]

Answer:

$\frac{3}{4}$

Step-by-step explanation:

$\frac{12}{16} =\frac{x}{y} \\\\\frac{12}{16} =\frac{3}{4}$

Divide the numerator and denominator by 4

5 0

3 years ago

3 x - 23 =

S_A_V [24]

Answer:

-69

-84

-9

-90

I hope it is helpful

8 0

2 years ago

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What is an inequality for "the opposite of x is greater than 2"?

bagirrra123 [75]

-x > 2 so negative x is larger than positive 2

8 0

3 years ago

For f (x) = 2x+1 and g(x) = x+14, find (fog)(x).

WITCHER [35]

Answer:

(fog)(x)=2x+29 (A)

Step-by-step explanation:

You put g(x) into f(x) for x and solve.

4 0

3 years ago

Read 2 more answers