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2 years ago

PLZ HELP I REWARD BRAINLIEST PLZ!!

Mathematics

2 answers:

Neko [114]2 years ago

8 0

Answer:

.......................

Step-by-step explanation:

a) x=14°

b) x=23°

Murljashka [212]2 years ago

5 0

I think these answers

A. 14
B. 23

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A source of information randomly generates symbols from a four letter alphabet {w, x, y, z }. The probability of each symbol is

koban [17]

The expected length of code for one encoded symbol is

$\displaystyle\sum_{\alpha\in\{w,x,y,z\}}p_\alpha\ell_\alpha$

where $p_\alpha$ is the probability of picking the letter $\alpha$ , and $\ell_\alpha$ is the length of code needed to encode $\alpha$ . $p_\alpha$ is given to us, and we have

$\begin{cases}\ell_w=1\\\ell_x=2\\\ell_y=\ell_z=3\end{cases}$

so that we expect a contribution of

$\dfrac12+\dfrac24+\dfrac{2\cdot3}8=\dfrac{11}8=1.375$

bits to the code per encoded letter. For a string of length $n$ , we would then expect $E[L]=1.375n$ .

By definition of variance, we have

$\mathrm{Var}[L]=E\left[(L-E[L])^2\right]=E[L^2]-E[L]^2$

For a string consisting of one letter, we have

$\displaystyle\sum_{\alpha\in\{w,x,y,z\}}p_\alpha{\ell_\alpha}^2=\dfrac12+\dfrac{2^2}4+\dfrac{2\cdot3^2}8=\dfrac{15}4$

so that the variance for the length such a string is

$\dfrac{15}4-\left(\dfrac{11}8\right)^2=\dfrac{119}{64}\approx1.859$

"squared" bits per encoded letter. For a string of length $n$ , we would get $\mathrm{Var}[L]=1.859n$ .

5 0

2 years ago

Tammy knits blanket and scarves. On the first day of a craft fair, she sells 2 blankets and 5 scarves for $104

omeli [17]

Answer:

Cost of Blanket = 32

Step-by-step explanation:

Let the cost of a blanket be = b , cost of a scarf be = s. Blanket price x Blanket Quantity & Scarf Price x Scarf Quantity sum up to be total sales.

So, Day 1 : 2b + 5s = 104 (i) , Day 2 : 3b + 4s = 128 (ii)

Solving equations : Multiplying (i) by 3 , & (ii) by 2 , we get

6b + 15s = 312 ,

(-)6b + (-)8s = (-)256

By elimination method, 15s - 8s = 312 - 256 → 7s = 56 → s = 56 / 7 = 8 .

Putting s value in any equation i], 2b + 5 (8) = 104 → 2b + 40 = 104 → 2b = 104 - 40 = 64 → b = 64 / 2 = 32

3 0

2 years ago

Find the area of the figure 40 yd 36 yd 20 yd 10 yd 10 yd

Ksenya-84 [330]

Answer:

1640yd

Step-by-step explanation:

10*10*2=200

36*40=1440

200+1440=1640 yd

4 0

3 years ago

What would you do to rationalize the denominator and simplify <img src="https://tex.z-dn.net/?f=%5Cfrac%7B5%7D%7B%5Csqrt%7B2%7D%

Tanya [424]

Answer:

(5√2) / 2

Step-by-step explanation:

Multiply

(5 / √2) * (√2 / √2) = (5√2) / 2

5 0

2 years ago

Read 2 more answers

Translate the phrase into a variable expression. Use the letter sto name the

Ad libitum [116K]

Answer:

The statement

the product of 60 and the number of seconds is written as

60 * s

Hope this helps you

6 0

3 years ago