Determine whether the matrix is in row-echelon form, reduced row-echelon form or neither.  figure 1.png)
What will be an ideal response?
row-echelon form
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Simplify. Combine like terms if possible.-4y2 - (-7y2)
A. 3y2 B. Not like terms C. -11y2 D. -3y2
In a certain city there is a river running through the middle of the city. There are three islands and nine bridges as shown in the figure below.
Suppose there is a crossing charge of $1.00 every time one crosses a bridge. A tourist wants to start on the South Bank, stroll across each of the bridges at least once, and return to her hotel on the South Bank at the end of the trip. What is the cheapest possible cost of such a trip?
A. $10 B. $9 C. $11 D. $12 E. none of these
The graph of a function is given. Determine whether the function is increasing, decreasing, or constant on the given interval.(- 2, - 1)
A. decreasing B. constant C. increasing
Solve the problem.The linear function f computes the distance y in miles between a car and the city of Vancouver after x hours, where 
The graphs of f and the horizontal lines 
and 
are shown in the figure. (i) When is the car 90 to 180 miles from Vancouver? (ii) when is the car's distance from Vancouver less than 180 miles. 
A. between 3 and 8 hours after departure; after it has traveled 1 hour B. before it has traveled 7 hours; between 7 and 8 hours after departure C. after it has traveled 1 hour; before it has traveled 7 hours D. between 1 and 7 hours after departure; before it has traveled 7 hours