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3 years ago

Simplify 10(2x + 3) - 20.

Mathematics

2 answers:

Brut [27]3 years ago

6 0

Answer:

Step-by-step explanation:

Alexeev081 [22]3 years ago

6 0

Answer:

20x + 10

Step-by-step explanation:

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The least squares regression line minimizes the sum of the:

lorasvet [3.4K]

Answer:

d) Squared differences between actual and predicted Y values.

Step-by-step explanation:

Regression is called "least squares" regression line. The line takes the form = a + b*X where a and b are both constants. Value of Y and X is specific value of independent variable.Such formula could be used to generate values of given value X.

For example,

suppose a = 10 and b = 7. If X is 10, then predicted value for Y of 45 (from 10 + 5*7). It turns out that with any two variables X and Y. In other words, there exists one formula that will produce the best, or most accurate predictions for Y given X. Any other equation would not fit as well and would predict Y with more error. That equation is called the least squares regression equation.

It minimize the squared difference between actual and predicted value.

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3 years ago

4x+6-3x=8-2x The answer comes up wrong if I put .6 or .66666 or .6666667

Anettt [7]

The answer would be x=2/3

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3 years ago

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Expand (x+2y)^2 hgghhhhjjjjjjj

Sonbull [250]

Step-by-step explanation:

(x+2y)²=x²+4xy+4y²

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3 years ago

What is the area of the figure? 7in 8in 8in 7in 4in 16 in

Tresset [83]

Answer:

120 inches

Step-by-step explanation:

hope this helps

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3 years ago

Solve the system of equations. 10x+y=−20 y=2x2−4x−16 ( , ) and ( , )

Sladkaya [172]

I will go about solving this using the elimination method.

First, convert the equations.

10x + y = -20
4x + y = -12

Second, find the easiest variable to get rid of and get rid of it! (In this case, y) We will subtract to get rid of y.

6x = -8

Third, you want to solve the equation.

6x = -8 (divide by 6)
x = $-1 \frac{1}{3}$

Fourth, solve for y by inserting the answer for x into one of the equations.

10( $-1 \frac{1}{3}$ ) + y = -20
$-13 \frac{1}{3}$ + y = -20 (subtract $-13 \frac{1}{3}$ )
y = $-6 \frac{2}{3}$

The solution for this system of equations is ( $-1 \frac{1}{3}$ , $-6 \frac{2}{3}$ ).

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3 years ago

Read 2 more answers