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3 years ago

Here is the sample space for three tosses of a coin.

Mathematics

2 answers:

Thepotemich [5.8K]3 years ago

8 0

I just finished this test a second ago the answer is 0.125 so it is option A

BARSIC [14]3 years ago

6 0

Assuming the coin is fair, the probability of the coin toss resulting in H is $p=\dfrac12$ . So the probability of getting two Hs, in any order, is

$\dbinom32p^2(1-p)=\dfrac38=0.375$

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Which type of data would be best displayed in a histogram?

Galina-37 [17]

Answer: A graphical display of data using different heights

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2 years ago

What is the quadratic regression equation for the data set? <br><br> PLEASEE HELP ME

Soloha48 [4]

You're trying to find constants $a_0,a_1,a_2$ such that $\hat y=a_0+a_1\hat x+a_2{\hat x}^2$ . Equivalently, you're looking for the least-square solution to the following matrix equation.

$\underbrace{\begin{bmatrix}1&6&6^2\\1&3&3^2\\\vdots&\vdots&\vdots\\1&9&9^2\end{bmatrix}}_{\mathbf A}\underbrace{\begin{bmatrix}a_0\\a_1\\a_2\end{bmatrix}}_{\mathbf x}=\underbrace{\begin{bmatrix}100\\110\\\vdots\\70\end{bmatrix}}_{\mathbf b}$

To solve $\mathbf{Ax}=\mathbf b$ , multiply both sides by the transpose of $\mathbf A$ , which introduces an invertible square matrix on the LHS.

$\mathbf{Ax}=\mathbf b\implies\mathbf A^\top\mathbf{Ax}=\mathbf A^\top\mathbf b\implies\mathbf x=(\mathbf A^\top\mathbf A)^{-1}\mathbf A^\top\mathbf b$

Computing this, you'd find that

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8 0

4 years ago

You surveyed 112 students and found out that 14 went to the movies last week-

Cerrena [4.2K]

Answer:

c) 325

Step-by-step explanation:

The fraction of students that went to the movies is 14/112. To find the number of students who went to the movies from a larger group, you have to find a fraction equal to 14/112, whose denominator is 2600 (the number of students from the larger group).

14/112 = x/2600

You can do cross multiplication here. Cross multiplication is multiplying the denominator of one fraction by the numerator of the fraction equivalent to it. That product will be equal to the numerator of the first fraction * denominator of the second fraction.

112*x = 14*2600

x = 325

Approximately 325 students out of 2600 students would've gone to the movie last weekend.

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3 years ago

What is the product of 1.54 and 2.6?

34kurt

Answer:

the product of 1.54 and 2.6 is 4.004. I think

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3 years ago

Evaluate function expressions <br><br> 3•f(-4)- 3•g(-2)

MAXImum [283]

Answer:3(-4f-g(to the power of -2)

Step-by-step explanation:

3(-fx4-g(to the power of -2) reorder and get solution.

6 0

3 years ago

Read 2 more answers