3 years ago

What adds to get 15 and multiplies to get negative 20

1 answer:

5 0

This is a very hard questions but i tried my best and i tried and even tried decimals! but it was too hard for me! sorry!

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The following data points are the number of games pitched by each of the Greenbury Goblins' starting pitchers last season.

Leviafan [203]

Answer: 1.87 games

Step-by-step explanation:

step 1 ; x= 3+2+4+7 divide 4 = 16/4 = 4 games

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3 years ago

Compare using >, <, or =. 3 miles_5,000 yards

lina2011 [118]

Answer:

3 miles = 5280 yds

5280 yds > 5,000 yds

in this case 3 miles is greater than 5,000 yards

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2 years ago

C is equidistant from A and B. What is the value of x? A. 6 B. 8 C. 12 D. 14

VLD [36.1K]

The correct answer that i came up with is D

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2 years ago

What is the quadratic regression equation for the data set? 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

$\mathbf x=\begin{bmatrix}a_0\\a_1\\a_2\end{bmatrix}\approx\begin{bmatrix}121.119\\-3.786\\-0.175\end{bmatrix}$

which means the first choice is correct.

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3 years ago

One-half cup of black beans provides 12% of the potassium you need daily. You must get the remaining 3,740 milligrams from other

Aleks04 [339]

34 grams
hope this helped!

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2 years ago