Answer:
64 builders must be employed to build a house in 16 days
Answer:

Step-by-step explanation:
AC = AB + BC



Add 7 to both sides:


Subtract 7x from both sides:

Divide both sides by 11:


Answer: 72 9 times 8 is 72
Step-by-step explanation:
Answer:
Step-by-step explanation:
#1 Number of ways picking 2 from 6 = 6C2 = 15
#2 Arranging them in a circle (consider 1 pair AB)
can be done
1,5 (ABBBBB) or (5,1)
2,4 ( AABBBB) or (4,2)
3,3
1,1 (ABABAB)
all up = 7 ways
#3 = product of #1 and #2 = 15x7 = 105
if you add a negitive to a positive its like subtracting like 20 - (-30) (that would be -10) for your question its 0.6