Answer:
HN congruent to NL
Step-by-step explanation:
They have a line crossing both of them, signifiying congruence.
x+142 =3x+64
subtract x from each side
142 = 2x+64
subtract 64 from each side
142-64 = 2x
78=2x
divide by 2
78/2 = x
x=39
The number is 39
Answer:
3
Step-by-step explanation:
Average = total sum of all numbers/number of items in set
Average = 18/6
Average = 3
Answer:
G. 66 feet
Step-by-step explanation:
Radius = 21/2 = 10.5
Circumference
2 × 3.14 × 10.5
65.94 feet
The formula for finding the volume of a sphere is 
If 40mm is the radius of the sphere, the volume will be about
mm.