Answer:
Step-by-step explanation:
Michael works for 25 hours
(_ , _) means (X , Y)
(25 , ) means
X = 25 then you need find the value of Y from the equation .

so the first answer is (25,-3)
..............
( , -8) means
Y = -8 then you need to find the value of X from the equation .

so the second answer is ( 0 , -8 )
hope this would help you
A common multiple of 60,84,and 24 is 12
60/12 = 5
84/12 = 7
24/12 = 2
so u will have 12 bouquets, each one containing 5 roses, 7 daisies, and 2 lillies