Answer:
a

b

c

Step-by-step explanation:
Generally the size of the sample sample space is mathematically represented as

Where N is the total number of objects available and r is the number of objects to be selected
So for a, where N = 19 and r = 8



For b Where N = 25 and r = 3



For c Where N = 23 and r = 2



Answer:
A
Step-by-step explanation:
Use the pythagorean theorm
16^2 + 12^2 = c^2
256 + 144 = c^2
400 = c^2
c = 20 feet or a
7/13 = about 0.54
-1 1/2 = -1.5
The answer is
-1.7, -1 1/2, 0.04, 0.1, 7/13
Answer:(A²-B²) = (A-B)² + 2AB
Step-by-step explanation: