Answer:
3 adult tickets and 4 child tickets
Step-by-step explanation:
a + k = 7
a = 7 - k
12a + 9k = 72
12a + 9k = 72
12(7 - k) + 9k = 72
84 - 3k = 72
84 - 3k = 72
3k = 12
k = 4
a = 3
-2x + 3a - 6 - 5x - 7a....combine like terms
-7x - 4a - 6 <==
110/154 = x/126
154x/13860
x = 13860 /154 = 90
90 milligrams of medicine A
Where are the other answers?
V=ca times height
1040=40 times h
H=1040 divide by 40
Height=26