Ask question

Ask question

All categories

2 years ago

9

verron tossed a coin 20 times the results were 8 heads and 12 tails, What is the best comparison between the theoretical and exp

erimental probability of tossing heads?

1 answer:

natta225 [31]2 years ago

6 0

Answer:

exp prob is less than theoret prob

Step-by-step explanation:

experimental 8 out of 20 8/20

theoretical 10 out of 20 10/20

You might be interested in

If α and β are the zeros of the quadratic polynomial f(x) = 3x2–4x + 5, find a polynomialwhose zeros are 2α + 3β and 3α + 2β.

Lelechka [254]

Answer:

$\boxed{\sf \ \ \ 3x^2-20x+37\ \ \ }$

Step-by-step explanation:

Hello,

a and b are the zeros, we can say that

$f(x)=3(x^2-\dfrac{4}{3}x+\dfrac{5}{3}) = 3(x-a)(x-b)=3(x-(a+b)x+ab)$

So we can say that

$a+b=\dfrac{4}{3}\\ab=\dfrac{5}{3}$

Now, we are looking for a polynomial where zeros are 2a+3b and 3a+2b

for instance we can write

$(x-2a-3b)(x-3a-2b)=x^2-(2a+3b+3a+2b)x+(2a+3b)(3a+2b)\\= x^2-5(a+b)x+6a^2+6b^2+9ab+4ab$

and we can notice that

$a^2+b^2=(a+b)^2-2ab$ so

$(x-2a-3b)(x-3a-2b)=x^2-5(a+b)x+6[(a+b)2-2ab]+13ab\\= x^2-5(a+b)x+6(a+b)^2+ab$

it comes

$x^2-5*\dfrac{4}{3}x+6(\dfrac{4}{3})^2+\dfrac{5}{3}$

multiply by 3

$3x^2-20x+2*16+5=3x^2-20x+37$

4 0

3 years ago

Select the correct answer.

charle [14.2K]

Answer: C

Step-by-step explanation:

$4^{-11/3 -(-2/3)=4^{-11/3 + 2/3}=4^{-3}=1/64$

5 0

2 years ago

Carmen is mailing packages. Each small package costs her $2.60 to send. Each large package costs her $3.40. How much will it cos

Fantom [35]

Answer:

By themselves $18.20, $13.60, and together $31.80

Step-by-step explanation:

$2.60 multiplied by 7 equals $18.20

$3.40 multiplied by 4 equals $13.60

Together this equals $31.80

6 0

3 years ago

I need help fast...........

Gennadij [26K]

15x - 5(3x-7) = 14
15x - 15x+ 35 = 14
35 = 14 ...NOT TRUE

answer
NO solution

you got it correct

5 0

3 years ago

What is the answer to -10y+90=80

Elza [17]

Answer:

y=1

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers