Answer:
ways.
Step-by-step explanation:
is the number of ways in which 
distinct objects are selected from a pile of 
distinct objects.
In our question,there are a total of 
people.
So,
.
Given that three are selected at random.
So,
.
So,the answer is ways.
Depends on how much people want there too be cooking books
Answer:
4 sisters
Step-by-step explanation:
-This is a logic question.
-Given that she has 3 sisters, it only means that the 4 are siblings of the same family.
-As such, eaxh sister can correctly claim to have 3 sisters.
Hence, there is a total of 4 sisters.
Answer:
70.4 meters
Step-by-step explanation:
A to B: 40²+10²=c² = 1600+100=c² = 1700=c² = c=√1700 = 41.23
B to C: 25²+15²=c² = 625+225=c² = 850=c² = c=√850 = 29.15
41.23+29.15=70.38
Answer: 11.18
Step-by-step explanation:
You’re substituting 5 for x in the equations...
Sqrt[x^2+4x^2]
Sqrt[5^2+4(5)^2]
Sqrt[25+4(25)]
Sqrt[25+100]
Sqrt[125]
