What does this mean? Test the residuals of two other points to determine how well the line of best fit models the data.

1 answer:

4 0

A residual is a measure of how well a line fits an individual data point. Testing the two other points can really help to see how well the line fits.

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Which is the best definition of a trapezoid? A.a parallelogram that can have 2 equal sides B.a parallelogram with no equal sides

lina2011 [118]

D a quadrilateral with one pair of parallel sides

7 0

2 years ago

Help me with this please

alina1380 [7]

If you assign variables to the problem, it can make things a lot simpler. Lets say chairs are x and tables are y. Therefore you have:
2x+6y=40
5x+3y=25
Now you can isolate the variable of one equation and put it into another (it doesn't matter which. I'm going to manipulate the top equation to plug into the bottom one).
2x=40-6y
x=20-3y
Now I plug into bottom equatioin:
5(20-3y) + 3y=25
100-15y+3y=25
100-12y=25
-12y=-75
y=$6.25
Now you can plug in y in either equation to get x.
2x+6(6.25)=40
37.5+2x=40
2x=2.5
x=1.25
So it costs $6.25 for each table and $1.25 for each chair. If you think about it, it would make sense for the table to cost more for the chair.

6 0

3 years ago

Let f and g be two functions defined as

tia_tia [17]

$a) \: (f \times g)(x) = (2x + 5)( {x}^{2} - 7x + 5) \\ b) \: (f \times g)(4) = (2 \times 4 + 5)( {4}^{2} - 7 \times 4 + 5) = 13( - 7) = - 91$