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OLga [1]
3 years ago
15

-9(-5k+3m)+9m-4(-5m+9k)​

Mathematics
2 answers:
lyudmila [28]3 years ago
7 0

Answer:

9k+2m

Step-by-step explanation:

-9(-5k+3m)+9m-4(-5m+9k)

45k-27m+9m+20m-36k

45k-36k-27m+9m+20m

9k+2m

Veseljchak [2.6K]3 years ago
5 0

Answer:

9k + 2m

Step-by-step explanation:

- 9(-5k + 3m) + 9m - 4(-5m + 9k)

45k - 27m + 9m + 20m - 36k

45k - 36k - 27m + 9m + 20m

9k + 2m

Hope this helps!

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Algebra 1 Chapter 5 test
Anuta_ua [19.1K]

I didn't understand your question.

8 0
3 years ago
80/100 as a percentage​
lutik1710 [3]

Answer:

<h2><em><u>80</u></em><em><u>%</u></em>.</h2>

Step-by-step explanation:

<em><u>Since</u></em><em><u>,</u></em>

Any number if divided by hundred then that no. is known as a <em><u>percentage</u></em>.

<em><u>Here</u></em><em><u>,</u></em>

<em><u>80</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>divided</u></em><em><u> </u></em><em><u>by</u></em><em><u> </u></em><em><u>100</u></em><em><u> </u></em><em><u>i</u></em><em><u>. </u></em><em><u>e</u></em><em><u>.</u></em>

80 / 100

= <em><u>80% (Ans)</u></em>

4 0
3 years ago
Read 2 more answers
What is the value of z in the table? A 4% peroxide solution is mixed with a 10% peroxide solution, resulting in 100 L of an 8% s
Tresset [83]

Answer:

87.1

Step-by-step explanation:

Lets say, first number = x


Second number = 3x+7


Total = 49



(x)+(3x+7)= 49


4x+7 = 49


4x = 42


x = 42/4


x= 10.5



x= 10.5


3x+7 = 3(10.5)+7 = 87.1



Hope this helps!!

4 0
4 years ago
Read 2 more answers
I don’t understandddd
earnstyle [38]

Answer:

N = 10

Step-by-step explanation:

-17+ x/5 = 33

You have to find x, in this case is N

x/5 = 33 + 17

x/5 = 50

x= 50/5

x =10

N= 10

8 0
4 years ago
Read 2 more answers
Let X have the uniform distribution U(0, 2) and let the conditional distribution of Y , given that X = x, be U(0, x). Find the j
Elina [12.6K]

Answer:

f(x,y) = \frac{1}{x} \frac{1}{2}= \frac{1}{2x} , 0\leq x \leq 2 , 0\leq y \leq x

E(Y|x) = \int_{x=y}^2 y \frac{1}{x} dx= y ln x \Big|_{x=y}^2 =y ln 2 -y ln y = y(1-lny) \

Step-by-step explanation:

We have two random variables X and Y. X \sim Unif(0,2) and given that X=x, Y has uniform distribution (0,x)

From the definition of the uniform distribution we have the densities for each random variable given by:

f_X (x) =\frac{1}{2} , 0\leq x\leq 2

f_{Y|X} (y|x) = \frac{1}{x}, 0\leq y \leq x

And on this case we can find the joint density with the following formula:

f(x,y) = f_{Y|X}(y|x) f_X (x)

And multiplying the densities we got this:

f(x,y) = \frac{1}{x} \frac{1}{2}= \frac{1}{2x} , 0\leq x \leq 2 , 0\leq y \leq x

Now with the joint density we can find the expected value E(Y|x) with the following formula:

E(Y|x) = \int y f_{Y|X}(y|x)dx

And replacing we got:

E(Y|x) = \int_{x=y}^2 y \frac{1}{x} dx= y ln x \Big|_{x=y}^2 =y ln 2 -y ln y = y(1-lny) \

5 0
4 years ago
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