Answer:
4
Step-by-step explanation:
n represents the number
n = -12 + n2 reorder terms
n = n2 - 12 subtract n from both sides
0 = n2 - n - 12 FOIL
0 = (n - 4)(n + 3)
(-3,4)
So the only 2 numbers that could be 12 less than its square are -3 and 4, but I am pretty sure that they want positive numbers, so I would go with 4.
I really don't know
they formed 11 groups
S = 40w + 450
439.6 inches
The distance apart cna be obtained using the formular :
Number of revolutions = 7
Diameter, d = 20 inches
π * number of revolutions * diameter
3.14 * 7 * 20
= 439.6 inches
Ummm -6 and -4
Duh