All categories

3 years ago

If nine coins are flipped, what is the probability of obtaining at least one head?

Mathematics

1 answer:

Ostrovityanka [42]3 years ago

6 0

Answer:

the chance of getting at least 1 head is 99.8%.

Step-by-step explanation:

Since the chance to head is a %.5 chance, then thats the variable. There is 9 of those , and then mulitply that then subtract from one.

You might be interested in

Solve the equation for all values of x by completing the square.<br> 3x^2+177= -48x

GaryK [48]

Use the formula

(

)

in order to create a new term. Solve for

by using this term to complete the square.

Exact Form:

√

−

Decimal Form:

−

5.76393202

…

−

10.23606797

4 0

3 years ago

Use a matrix to solve the system:

Romashka-Z-Leto [24]

Answer:

(2.83 , 1 , 4)

Step-by-step explanation:

$2x+2y-z=4\\4x-2y-2z=2\\3x+3y-4z=-4\\$

Rewrite these equations in matrix form

$\left[\begin{array}{ccc}2&2&-1\\4&-2&-2\\3&3&-4\end{array}\right] \left[\begin{array}{ccc}x\\y\\z\end{array}\right]=\left[\begin{array}{ccc}4\\2\\-4\end{array}\right] \\$

we can write it like this,

$AX=B\\X=A^{-1}B$

so to solve it we need to take the inverse of the 3 x 3 matrix A then multiply it by B.

We get the inverse of matrix A,

$A^{-1}=\left[\begin{array}{ccc}7/15&1/6&-1/5\\1/3&-1/6&0\\3/5&0&-2/5\end{array}\right] \\$

now multiply the matrix with B

$X=A^{-1}B\\\\\left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}7/15&1/6&-1/5\\1/3&-1/6&0\\3/5&0&-2/5\end{array}\right]\left[\begin{array}{ccc}4\\2\\-4\end{array}\right] \\\\\\\left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}2.83\\1\\4\end{array}\right] \\$

4 0

3 years ago

The slope of the line below is -3. Which of the following is the point-slope

Anna [14]

Given:

The slope of the line is -3.

The line passes through the point (2,-2).

To find:

The point-slope form of the line.

Solution:

Point slope form: If a line passes through the point $(x_1,y_1)$ with slope m, then the point-slope form of the line is:

$y-y_1=m(x-x_1)$

The slope of the line is -3 and it passes through the point (2,-2). So, the point-slope form of the line is:

$y-(-2)=-3(x-2)$

$y+2=-3(x-2)$

Therefore, the required point slope form of the given line is $y+2=-3(x-2)$ .

5 0

3 years ago

I WILL GIVE BRAINLIEST IF CORRECT !!!!

rosijanka [135]

Answer:

C. $3.2\times 10^{1}$

Step-by-step explanation:

$d_r$ = Diameter of a red blood cell = $0.0008\ \text{cm}$

$d_w$ = Diameter of a whooping cough virus = $2.5\times 10^{-5}\ \text{cm}$

Ratio of the diameter of the red blood cell to the diameter of the whooping cough virus

$\dfrac{d_r}{d_w}=\dfrac{0.0008}{2.5\times 10^{-5}}=\dfrac{0.0008}{25\times 10^{-6}}=\dfrac{0.0008\times 10^6}{25}\\\Rightarrow \dfrac{d_r}{d_w}=\dfrac{800}{25}\\\Rightarrow \dfrac{d_r}{d_w}=32=3.2\times 10^{1}$

The required ratio is $3.2\times 10^{1}$ .

4 0

3 years ago

List 13 meters, 15,000 meters, and 1900 centimeters in order from smallest to largest

Paha777 [63]

1 m = 100 cm

13 m is 13 m.

15 000 m is 15 000 m.

1900 cm = 1900/100 = 19m.

So we can see that 1900 cm which is 19 m is bigger than 13 m.

So from the smallest to the largest,

13m, 1900 cm, 15000 m.

Hope this explains it.

4 0

3 years ago

If nine coins are​ flipped, what is the probability of obtaining at least one head​?

If nine coins are flipped, what is the probability of obtaining at least one head?