Answer:

Step-by-step explanation:
Given the information, create the following augmented matrix:
The first order was for 1 tray of club sandwiches, at a cost of $9. The second-order, which cost $69, was for 5 trays of club sandwiches and 4 trays of vegetarian sandwiches.

Into an augmented matrix:

Solve.
Let x be the cost of a tray of club sandwiches.
Let y be the cost of a tray of vegetarian sandwiches.
( 0, 8 ) → B
Apply the given rule to the coordinates of point B (2, 5 )
thus B' = ( 2 - 2, 5 + 3 ) = (0, 8 )
Answer:
227 miles
Step-by-step explanation:
2.5 hours(2 hours 30 minutes) at 50mph means she travelled 150 miles during that time. 1.25 hours(1 hour and 25 minutes) at 62mph means she travelled 77 miles. You take the 2 answers, add them, and you have your total, the total is 150+77=227