Make Sense ? In Exercises 113, determine whether each statement makes sense or does not make sense, and explain your reasoning. I used a function to model data from 1990 through 2015. The independent variable in my model represented the number of years after 1990, so the function’s domain was { x | x = 0 , 1 , 2 , 3 , ... , 25 } .
Make Sense ? In Exercises 113, determine whether each statement makes sense or does not make sense, and explain your reasoning. I used a function to model data from 1990 through 2015. The independent variable in my model represented the number of years after 1990, so the function’s domain was { x | x = 0 , 1 , 2 , 3 , ... , 25 } .
Solution Summary: The author explains that a function to model data from 1990 through 2015 that represents the number of years after 1990 has the domain left[x|x=0,1,2,3,mathrm.
Make Sense? In Exercises 113, determine whether each statement makes sense or does not make sense, and explain your reasoning.
I used a function to model data from 1990 through 2015. The independent variable in my model represented the number of years after 1990, so the function’s domain was
{
x
|
x
=
0
,
1
,
2
,
3
,
...
,
25
}
.
The 2x2 linear system of equations -2x+4y = 8 and 4x-3y = 9 was put into the following
-2 4
8
augmented matrix:
4
-3
9
This augmented matrix is then converted to row echelon form. Which of the following matrices is the
appropriate row echelon form for the given augmented matrix?
0
Option 1:
1
11
-2
Option 2:
4
-3 9
Option 3:
10
܂
-2
-4
5
25
1
-2
-4
Option 4:
0 1
5
1 -2
Option 5:
0
0
20
-4
5
○ Option 1 is the appropriate row echelon form.
○ Option 2 is the appropriate row echelon form.
○ Option 3 is the appropriate row echelon form.
○ Option 4 is the appropriate row echelon form.
○ Option 5 is the appropriate row echelon form.
Let matrix A have order (dimension) 2x4 and let matrix B have order (dimension) 4x4.
What results when you compute A+B?
The resulting matrix will have dimensions of 2x4.
○ The resulting matrix will be a single number (scalar).
The resulting matrix will have dimensions of 4x4.
A+B is undefined since matrix A and B do not have the same dimensions.
If
-1
"[a446]-[254]
4b
=
-1
, find the values of a and b.
○ There is no solution for a and b.
○ There are infinite solutions for a and b.
O a=3, b=3
O a=1, b=2
O a=2, b=1
O a=2, b=2
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