Answer: There are 69 adults and 72 children went to the concert.
Step-by-step explanation:
Let x be the number of adults, and y be the number of children.
x + y = 141
3.5x + 2.5y = 421.5
x + y =141
x = 141 - y
3.5(141 - y) + 2.5y = 421.5
493.5 - 3.5y + 2.5y = 421.5
493.5 - y = 421.5
-y = -72
y = 72
x + y = 141
x + 72 = 141
x = 69
Answer:
C
Step-by-step explanation:
B is the answer
the formula is :

which r stands for radius
and h stands for height
the diameter is 16
so the radius is

hope you understand it
Answer:
B is correct
Step-by-step explanation:
-(-x) = x, because a double negative like this equals a positive.
Therefore, you are actually saying -x+x= 0 which is true.
f(x) = 4^(x − 1) + 2
f (1)=3 f (2)=6
avarage rate=[ f (1) - f (2)]/(2-1)
=(6-3)/1
=3//