Answer:
3
Step-by-step explanation:
First we must find the total boxes of pens
15 + 9 = 24
Then we can divide the total cost by the total number of boxes of pens
$72 / 24 boxes = 3
Given functions are


The total number of ducks and swans in the lake after n months can be determined by adding the functions s(n) and d(n).





Taking 2 as common, we get

Hence The total number of ducks and swans in the lake after n months is
Answer:
y= 1
Step-by-step explanation:
primero tienes que subtituir 3 en la x 2×3+y=7
6+y=7
-6. -6
y=1
Answer:
67 degrees
Step-by-step explanation:
46 + 67 + x = 180
x = 67