rorofhs2009
05.06.2020 •
Mathematics
City A is 9 miles due to City B.City C is 12 miles due east to City B.To the nearest mile what is the straight-line distance from City A to city C?
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Ответ:
11 large mowers were sold.
Step-by-step explanation:
Let x represent the number of small mowers sold.
Let y represent the number of large mowers sold.
The total number of mowers sold was 30. This means that
x + y = 30
The small mower costs $249.99. The large mower costs $329.99. Total sales of mowers for the year were $8379.79. This means that
249.99x + 329.99y = 8379.79 - - - -1
Substituting x = 30 - y into equation 1, it becomes
249.99(30 - y) + 329.99y = 8379.79
7499.7 - 249.99y + 329.99y = 8379.79
- 249.99y + 329.99y = 8379.79 - 7499.7
80y = 880.09
y = 880.09/80
y = 11
x = 30 - y = 30 - 11
x = 19