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3 years ago

Lucy Lou went shopping a Hollister with her friends. Together they spent a mean price of $40 on 8

Mathematics

2 answers:

Damm [24]3 years ago

5 0

The coat is it worth four dollars

Andrew [12]3 years ago

5 0

Answer:

$29

Step-by-step explanation:

Together they spent a mean price of $40 on 8 sweaters. The first 7 sweaters cost $50, $55, $30, $35, $39, $40 and $42. How much, in dollars, does the 8th sweater cost?

If the mean price is $40, 8 x 40 = the total price, = 320

Add up what we knew they spent:

50 + 55 + 30 + 35 + 39 + 40 + 42 = 291

The difference between those 2 numbers is the price of the 8th sweater

320 - 291 = 29

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Let Y be a random variable with a density function given by

Neporo4naja [7]

From the given density function we find the distribution function,

$F_Y(y)=P(Y\le y)=\displaystyle\int_{-\infty}^y f_Y(t)\,\mathrm dt=\begin{cases}0&\text{for }y$

(a)

$F_{U_1}(u_1)=P(U_1\le u_1)=P(3Y\le u_1)=P\left(Y\le\dfrac{u_1}3\right)=F_Y\left(\dfrac{u_1}3\right)$

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$\implies f_{U_1}(u_1)=\begin{cases}\frac{{u_1}^2}{18}&\text{for }-3\le u_1\le3\\0&\text{otherwise}\end{cases}$

(b)

$F_{U_2}(u_2)=P(3-Y\le u_2)=P(Y\ge3-u_2)=1-P(Y$

$\implies F_{U_2}(u_2)=\begin{cases}0&\text{for }u_2$

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(c)

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3 years ago

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Step-by-step explanation:

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A car travels at a speed of 55 miles per hour. How far will it travel in 5 hours?

kiruha [24]

Answer:

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Step-by-step explanation:

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3 years ago

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In triangle ABC, and C is a right angle. Find the value of the trig function find the sec(A) if C=25, B=20, A=15

asambeis [7]

Answer:

sec A = 5/4

Step-by-step explanation:

Sec of an angle is hypotenuse/adjacent side

In your problem, sec A = 25/20 = 5/4

It helps if you can draw a figure of the problem. Make sure you memorize the definition of each trig function

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3 years ago