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zalisa [80]
2 years ago
12

Find the slope from the graph below

Mathematics
1 answer:
larisa [96]2 years ago
7 0
You go up 4 times and go to the left 2 times so the slope would be 4/-2
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Country A produces about four times the amount of diamonds in carats produced in country B. If the total produced in both countr
sveta [45]

Answer:

Country A produces 20,000,000 & Country B produces 5,000,000

Step-by-step explanation:

Let

amount of diamonds produced by country A be x

and

amount of diamonds produced by country B be y

Since, Country A produces 4 times that of Country B, we can write:

x = 4y

Also, both countries produces a total of 25,000,000 carats, so we can write:

x + y = 25,000,000

Now, we need to find x and y. Putting 1st equation into 2nd equation, we get equation in y. Then we solve for y:

x + y = 25,000,000

4y + y = 25,000,000

5y = 25,000,000

y = 25,000,000/5

y = 5,000,000

And now, x = 4y, so x = 4(5,000,000) = 20,000,000

So Country A produces 20,000,000 & Country B produces 5,000,000 diamond carats

7 0
3 years ago
Suppose that Y has density function
zvonat [6]

I'm assuming

f(y)=\begin{cases}ky(1-y)&\text{for }0\le y\le1\\0&\text{otherwise}\end{cases}

(a) <em>f(x)</em> is a valid probability density function if its integral over the support is 1:

\displaystyle\int_{-\infty}^\infty f(x)\,\mathrm dx=k\int_0^1 y(1-y)\,\mathrm dy=k\int_0^1(y-y^2)\,\mathrm dy=1

Compute the integral:

\displaystyle\int_0^1(y-y^2)\,\mathrm dy=\left(\frac{y^2}2-\frac{y^3}3\right)\bigg|_0^1=\frac12-\frac13=\frac16

So we have

<em>k</em> / 6 = 1   →   <em>k</em> = 6

(b) By definition of conditional probability,

P(<em>Y</em> ≤ 0.4 | <em>Y</em> ≤ 0.8) = P(<em>Y</em> ≤ 0.4 and <em>Y</em> ≤ 0.8) / P(<em>Y</em> ≤ 0.8)

P(<em>Y</em> ≤ 0.4 | <em>Y</em> ≤ 0.8) = P(<em>Y</em> ≤ 0.4) / P(<em>Y</em> ≤ 0.8)

It makes sense to derive the cumulative distribution function (CDF) for the rest of the problem, since <em>F(y)</em> = P(<em>Y</em> ≤ <em>y</em>).

We have

\displaystyle F(y)=\int_{-\infty}^y f(t)\,\mathrm dt=\int_0^y6t(1-t)\,\mathrm dt=\begin{cases}0&\text{for }y

Then

P(<em>Y</em> ≤ 0.4) = <em>F</em> (0.4) = 0.352

P(<em>Y</em> ≤ 0.8) = <em>F</em> (0.8) = 0.896

and so

P(<em>Y</em> ≤ 0.4 | <em>Y</em> ≤ 0.8) = 0.352 / 0.896 ≈ 0.393

(c) The 0.95 quantile is the value <em>φ</em> such that

P(<em>Y</em> ≤ <em>φ</em>) = 0.95

In terms of the integral definition of the CDF, we have solve for <em>φ</em> such that

\displaystyle\int_{-\infty}^\varphi f(y)\,\mathrm dy=0.95

We have

\displaystyle\int_{-\infty}^\varphi f(y)\,\mathrm dy=\int_0^\varphi 6y(1-y)\,\mathrm dy=(3y^2-2y^3)\bigg|_0^\varphi = 0.95

which reduces to the cubic

3<em>φ</em>² - 2<em>φ</em>³ = 0.95

Use a calculator to solve this and find that <em>φ</em> ≈ 0.865.

8 0
3 years ago
Write an equation that represents a line that is parallel to y=3/4x and passes through the point (2,1).
Kisachek [45]
Insert the slope and point into point-slope form:-

y - 1 = 3/4(x - 2)
y = 3/4x - 6/4 + 1
y = 3/4x -  1/2
6 0
3 years ago
Write each rational number as a terminating decimal.<br> 1. 19/20<br> 2. -1/8<br> 3. 17/5
Dima020 [189]
19/20= 0.95
-1/8= -0.125
17/5= 3.4
HOPE THIS HELPS!
8 0
3 years ago
Read 2 more answers
A $1,287.99 TV was marked down at a 12% discount. What is the discounted price (or the reduced selling price)?
son4ous [18]

Answer:

1133.4312 US$

Step-by-step explanation:

Just use a calculator or write it down

7 0
2 years ago
Read 2 more answers
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