Answer:
R = 20
Step-by-step explanation:
mean age = sum of ages/no. of men
sum of ages of the men that left = 55 + 63 = 188
remaining sum = 50R - 118
remaining no. of men = R - 2
now mean age = 50 - 1 = 49 years
49 = 50R-118/R-2
49(R - 2) = 50R - 118
49R - 50R = -188 - 98
-R = -20
R = 20
Answer:
d
Step-by-step explanation:
Answer:
2x(4x-8)=o
0Step-by-step explanation:
but i know this 3x^2-4x-8=-6
800+16x=720+21x
80+16x=21x
80=5x
X=16
So 16 hours :)
1/2(8x -2) + ( -2x + 1/4)
(4x -1) + (-2x + 1/4)
=
(2x - 3/4) or (2x - 0.75)