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VikaD [51]
2 years ago
10

If k = 7 then find the value of 2k²

Mathematics
2 answers:
Ber [7]2 years ago
7 0

Answer:

boy

Step-by-step explanation:

Leya [2.2K]2 years ago
6 0

Answer:

98

Step-by-step explanation:

k = 7

2k^2

do the exponent

7 x 7 = 49

49 x 2 = 98

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Identify the ellipses, represented by equations, whose eccentricities are less than 0.5
ozzi

Answer:

See explanation

Step-by-step explanation:

Hello, we cannot see the ellipse equations.

The eccentric of an ellipse is given by:

e =  \frac{c}{a}

Assuming the equations are:

\frac{ {x}^{2} }{25}  +  \frac{ {y}^{2} }{16}  = 1

Then a²=25 and b²=16

{c}^{2}  =  {a}^{2}  -  {b}^{2}

{c}^{2}  = 25 - 16

{c}^{2}  =  {3}^{2}

c = 3

The eccentricity is:

e =  \frac{3}{5}  = 0.6

If the ellipse has equation,

\frac{ {x}^{2} }{ {5}^{2} }  +  \frac{ {y}^{2} }{ {3}^{2} }  = 1

then the this time, we have a=5 and b=3.

This means that:

{c}^{2}  =  {a}^{2}  -  {b}^{2}

{c}^{2}  =  {5}^{2}  -  {3}^{2}

{c}^{2}  =  {4}^{2}

c = 4

c =  \frac{4}{5}  = 0.8

3 0
3 years ago
Read 2 more answers
3.8=1.9z-3.8 what does z equal
ch4aika [34]
Add 3 to isolate y

3.8 + 3.8 = 1.9z - 3.8 + 3.8

7.6 = 1.9z

Divide by 1.9

4 = z


3 0
3 years ago
Iq scores are known to be normally distributed. the mean iq score is 100 and the standard deviation is 15. what percent of the p
kobusy [5.1K]

The 100%-Norm.Dist(value,mean,sd,true) percent of the population has an iq over 115

According to the statement

we have to find that the what percent of the population has an iq over 115.

And from given information,

the mean iq score is 100 and the standard deviation is 15.

And

Normal distribution, is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

And by use of this formula, we find the percentage of the population has an iq over 115.

Then the result will comes as 100%.

hence, 100%-Norm.Dist(value,mean,sd,true)

So, The 100%-Norm.Dist(value,mean,sd,true) percent of the population has an iq over 115.

Learn more about Normal distribution here

brainly.com/question/4079902

#SPJ4

6 0
1 year ago
_________________<br>√(-√2-(-√2))²+(√3-2√3)²
xz_007 [3.2K]
_________________
√(-√2-(-√2))²+(√3-2√3)²= 3
7 0
2 years ago
5x-2=3x+4 what does x equal
kozerog [31]

Answer:

Step-by-step explanation:

1. 5x-2=3x+4

      +2      +2

2. 5x=3x+6

   -3x -3x

3. 2x=6

    /2   /2

x=3

5 0
3 years ago
Read 2 more answers
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