X=(1/1+2) (8+6) + -6

Please help me i only have 30 mins to an hour to finish

nadya68 [22]

Answer:

D. 105 students

Step-by-step explantation: 11+10+21+6+2=50. So, 21 times 250 is 5250 and divided by 50 is 105.

4 0

3 years ago

Method of Least Squares, Evaluation of Cost Equation Lassiter Company used the method of least squares to develop a cost equatio

anyanavicka [17]

Answer:

(1) The cost formula is: y = $19,050 + $12·x.

(2) The cost of moving materials if 340 moves are made is $23,130.

(3) 82.81% of the variability in moving cost is explained by the number of moves.

Step-by-step explanation:

The computer output for the regression analysis of 80 data points is as follows:

Intercept: $19,050

Slope: 12

Coefficient of correlation: 0.91

Standard error: $220

(1)

The general formula of regression equation is:

y = a + b·x

Here,

a = intercept

b = slope

The cost formula is:

y = $19,050 + $12·x

(2)

Predict the cost of moving materials if 340 moves are made as follows:

$y = 19050 + 12\cdot x\\=19050+12\times 340\\=19050+4080\\=23130$

Thus, the cost of moving materials if 340 moves are made is $23,130.

(3)

The coefficient of determination R² specifies the percentage of the variance in the dependent variable (Y) that is forecasted or explained by linear regression and the forecaster variable (X, also recognized as the independent-variable).

The coefficient of determination R² can be computed by squaring the correlation coefficient value.

$R^{2}=(r)^{2}=(0.91)^{2}=0.8281$

Thus, 82.81% of the variability in moving cost is explained by the number of moves.

8 0

4 years ago

What is the value of 8(y + 5) / 3(3y + 7) if y = 3

scoray [572]

Short Answer B
Remark
I'm going to interpret this as
$\frac{8(y + 5)}{[3*(3y + 7)]}$

Step One
Before removing the brackets, the easiest way to start is to substitute for y.
$\frac{8(3 + 5)}{[3*(3*3 + 7)]}$

Step Two
Combine what's inside the brackets.
$\frac{8(8)}{[3*(9 + 7)]}$
$\frac{8(8)}{[3*(16)]}$

Step 3
Do the multiplication in both brackets in the top and bottom
$\frac{64}{48}$

Step 4
Reduce by dividing both top and bottom by 16.

$\frac{ \frac{64}{16} }{ \frac{48}{16} }$

The answer should be 4/3

4 0

3 years ago

A line with the slope of 1 passes thorough the point ( 8, 1 ) . What is it’s equation in slope intercept form?

ella [17]

First we need to define this equation using point slope form.

Point slope form is represented by the following (x₁ and y₁ represent the given points, and m represents slope)

$Y-Y_1 = m(X-X_1)$