A garden supply store sells two types of lawn mowers. Total sales of mowers for the year were $8379.79. The total number of mowers sold was 30. The small mower costs $249.99. The large mower costs $329.99. Find the number of large mowers sold. a. 11 c. 17 b. 19 d. 9

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

10 * 563.67 = 5636.7

6, 10

9, -13

12, -21

18, -23

step-by-step explanation:

you just add 6 to the x-coordinate and subtract 10 from the y-coordinate.