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3 years ago

Do the ratios 8/ 5 and 11 /6 form a proportion?

Mathematics

1 answer:

nordsb [41]3 years ago

4 0

Answer:

no they don't

hope this helps

have a good day :)

Step-by-step explanation:

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What's is the square root of -1 -i i -1 1

tankabanditka [31]

Answer:

see explanation

Step-by-step explanation:

The $\sqrt{-1}$ = i

7 0

3 years ago

Read 2 more answers

We wish to construct a 90% confidence interval on the mean of a population known to be normally distributed based on a sample of

sergiy2304 [10]

Answer:

Margin of error = 0.773

Step-by-step explanation:

We are given the following information in the question.

Sample size, n = 20

Sample mean = 8

Sample standard deviation = 2

90% Confidence interval

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 19 and}~\alpha_{0.10} = \pm 1.729$

Margin of error:

$t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$1.729(\frac{2}{\sqrt{20}} ) = 0.773$

7 0

3 years ago

The sum of three consecutive even numbers is 54 . find the numbers .

victus00 [196]

<h3>Answer :- </h3>

Let the three consecutive numbers be x -2 , x and x + 2
Their sum = ( x - 2 ) + ( x + 2 ) = 3x
This is the given equal to 54

3x = 54 or x = 54/3
x = 18

Thus , the required numbers are 16 , 18 , 20

5 0

2 years ago

HELP MEEEEEEEEE PLEASEEEEEEEEEEEEEE!!!!!!!!!!!!!!!!!!

Nadya [2.5K]

Answer: 58, 122

Step-by-step explanation:

$x+2x+6=180\\\\3x+6=180\\\\x+2=60\\\\x=58\\\\\therefore 180-x=122$

4 0

1 year ago

Read 2 more answers

F(x)=-9x^2-2x and g(x)=-3x^2+6x-9, find (f-g)(x) and (f-g)(-4)

Alona [7]

Answer:

(f - g)(x)= - 6 {x}^{2} - 8x + 9

(f - g)(-4!)= - 55

Step-by-step explanation:

$f(x) = - 9 {x}^{2} - 2x, \: \: g(x) = - 3 {x}^{2} + 6x - 9 \\ (f - g)(x) = f(x) - g(x) \\ = - 9 {x}^{2} - 2x - (- 3 {x}^{2} + 6x - 9) \\ = - 9 {x}^{2} - 2x + 3 {x}^{2} - 6x + 9 \\ \purple{ \boxed{ \bold{(f - g)(x)= - 6 {x}^{2} - 8x + 9}}} \\ (f - g)( - 4)= - 6 {( -4 )}^{2} - 8( - 4) + 9 \\ = - 6 \times 16 + 32 + 9 \\ = - 96 + 41 \\ \red{ \boxed{ \bold{(f - g)( - 4)= - 55}}}$

6 0

3 years ago