1 = 1, 2, 3, 4, 5
4= 4, 8, 12, 16, 20
5= 5, 10, 15, 20, 25
Answer:
a+c+d=180
Step-by-step explanation:
#7 is the easiest one.
a + bi = -9 + 4i
see the expression on either side matches up so..
a = -9 and b = 4
First generation: 3
Second generation:

Third generation:

Fourth generation:

And so on. The general formula for the

th generation is

. So by the 15th generation, you should expect around

geese.