If 12 hawks in 72 are buildings nests, we can say that the portion of hawks building nests is 12/72, or 1/6. Multiply 1/6 by 10800, which gives 1800 hawks building nests
Given are several terms in a quadratic pattern:
a1 = ?
a2 = 1
a3 = -16
a4 = ?
a5 = -14
let:
x y
1 ?
2 1
3 -16
4 ?
5 -14
considering the 2nd term and 3rd term, we can determine a quadratic function:
y = -17x + 35
therefore,
a1 = 18
a4 = -33
5(3 + 6) - 3(12 - 9)
5(9) - 3(3)
45 - 9
36