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3 years ago

Please answer me this question

Mathematics

1 answer:

In-s [12.5K]3 years ago

7 0

Answer:

x=0.4 and y=0.6

Step-by-step explanation:

Given :

$\frac{x}{2} +y=0.8\\x+2y=1.6.......(1)\\\frac{7}{x+y/2} =10\\\frac{7}{2x+y/2} =10\\\frac{7*2}{2x+y} =10\\\frac{14}{2x+y} =10\\14=10(2x+y)\\14=20x+10y.....(2)$

From solving above equation (1) and (2)

x=0.4

y=0.6

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Factor 7x^3+28x^2+21x

jarptica [38.1K]

Answer:

7x (x + 1 ) ( x + 3 )

Step-by-step explanation:

7x³ +28x² +21x

7x ( x² + 4x + 3 )

7x [ x² + 1x + 3x + 3 ]

7x [ x ( x + 1 ) + 3 ( x + 1 ) ]

7x (x + 1 ) ( x + 3 )

3 0

3 years ago

a daily newspaper has 10225 subscribers when it began publication. six years old later it has 8200 subscribers what is the avera

seraphim [82]

Answer:

The rate of change in number of subscriber for the six years is 3.62%

Step-by-step explanation:

Given as :

The initial subscriber of newspaper = p = 10225

The subscriber of newspaper after 6 years of publish = P = 8200

The time period = t = 6 years

Let The average yearly rate of change = r%

Now, According to question

The subscriber of newspaper after n years = initial subscriber × $(1-\dfrac{\textrm rate}{100})^{\textrm time}$

Or, P = p × $(1-\dfrac{\textrm r}{100})^{\textrm t}$

Or, 8200 = 10225 × $(1-\dfrac{\textrm r}{100})^{\textrm 6}$

Or, $\dfrac{8200}{10225}$ = $(1-\dfrac{\textrm r}{100})^{\textrm 6}$

Or, 0.80195 = $(1-\dfrac{\textrm r}{100})^{\textrm 6}$

Taking power $\dfrac{1}{6}$ both side

So, $(0.80195 )^{\frac{1}{6}}$ = $((1 - \frac{r}{100} )^{6})^{\frac{1}{6}}$

Or, 0.9638 = 1 - $\dfrac{r}{100}$

Or, $\dfrac{r}{100}$ = 1 - 0.9638

Or, $\dfrac{r}{100}$ = 0.0362

Or, r = 0.0362 × 100

i.e r = 3.62

So, The rate of change in subscriber = 3.62%

Hence, The rate of change in number of subscriber for the six years is 3.62% . Answer

4 0

3 years ago

The 10. A jet flies at an altitude of 52,800 feet. What is the height of the jet in miles?

aliya0001 [1]

Answer:

The Answer is 10 Miles.

Step-by-step explanation:

The jet is 52,800 feet high.

There are 5,280 feet in a mile.

Divide 52,800 by 5280 to find miles:

52800 / 5280 = 10 Miles.

Hope this Helps! Have an Awesome Day!! :-)

5 0

3 years ago

Read 2 more answers

X x is the first five consonants of english alphabet

satela [25.4K]

Consonants are letters that are not vowels a e I o u sometimes y
The first 5 consonants are

a.B.C.D.e.F.G

B
C
D
F and
G

4 0

3 years ago

Complete the table of values for y=2x+3

Elena-2011 [213]

$y = - 2047 \\ x = - 10125$

Step-by-step explanation:

$y = 2x + 3 \\ x = - 2 - 10123 \\ x = - 10125 \\ y = 2( - 10125) + 3 \\ y = - 20520 + 3 \\ y = - 20247$

5 0

3 years ago

Please answer me this question ​

Please answer me this question