Answer:
15=-6c-3d
Step-by-step explanation:
If 15=-3(2c+d)
=15=(-3×2c) - (-3×d)
=15=-6c-3d
Mean=total/the number of values =>total=mean*the number of values
the total of the first set of 8 numbers is : total=8*8=64
the total of the second set of 12 numbers is: 12m
the total of the 20 numbers is: 64+12m
the mean of the 20 number is: (64+12m)/20=5
solve for m: 64+12m=100
12m=36
m=3
Step-by-step explanation:
Answer:
The answer is: 181.5 square centimeters.
Step-by-step explanation:
The cube has six faces, and each face is a square with sides of length 5.5, so the area of one of this faces is , adding the six faces, we get the answer:
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