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3 years ago

What algebraic expression is 5+3(2x-7)=5+6x-21

Mathematics

1 answer:

Nesterboy [21]3 years ago

7 0

I am hundred percent sure yur answer is 10

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375000000 divided by 1570000000

Zielflug [23.3K]

Answer: 0.238853503185

(I obviously used a calculator.)

If you rounded this answer, it would be 0.24. Hope this helps!

8 0

3 years ago

Read 2 more answers

Show that the following functions are probability density functions for some value of k and determine k. Then, determine the mea

lord [1]

Answer:

a) 17.5

b) 15.6

c) 13.3

d) 21.51

Step-by-step explanation:

The given function is equal to:

f(x)=kx^2

where

$\int\limits^y_0 {kx^{2} } \, =1$

where y=23

Clearing k=0.00025

a) $Ex=\int\limits^y_0 {xf(x)} \, dx =\int\limits^y_0 {x*0.00025x^{2} } \, dx =17.5$

b) $Vx=Ex^{2} -(Ex)^{2} =\int\limits^y_0 {x^{2}f(x) } \, dx-17.5^{2} =\int\limits^y_0 {x^{2} *0.00025x^{2} } \, dx -17.5^{2} =321.82-306.25=15.6$

c) The function is equal to:

f(x)=k(1+2x)

$\int\limits^y_0 {k(1+2x)} \, =1$

where y=20

k=0.0024

$Ex=\int\limits^y_0 {xf(x)} \, dx =\int\limits^y_0 {x*0.0024(1+2x)} \, dx =13.3$

d) $Vx=Ex^{2} -(Ex)^{2} =\int\limits^y_0 {x^{2} f(x)} \, dx -13.3^{2}=\int\limits^y_0 {x^{2} *0.0024(1+2x)} \, dx-13.3^{2} =198.4-176.89=21.51$

8 0

3 years ago

6 ( x + 1) - 5 (x + 2)

vagabundo [1.1K]

Answer:

x-4

Step-by-step explanation:

6x+6-5x-10=

x-4

( you have to multiply what is inside the parenthases to get to the first step that i did)

4 0

3 years ago

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I need help ASAP 10 points! And I will mark you Brainly

MrRa [10]

Answer:

its c

Step-by-step explanation:

will you please marke me as bainly

7 0

3 years ago

What is it quadratic, radical, rational?

mamaluj [8]

Answer:

quadratic formula is ur answer for letter B

3 0

3 years ago