F(8)=4(8)-2+7(8)
f(8)=32-2+56
f(8)=86
f(-5)=4(-5)-2+7(-5)
f(-5)=-20-2+2
f(-5)=20
f(0)=4(0)-2+7(0)
f(0)=0-2+0
f(0)=-2
Answer:
Expected number of guests is 100.4.
Step-by-step explanation:
It is given that there are 161 guest if there is a heavy snow fall.
Also, the probability for a heavy snow fall is 0.40.
Therefore, P(X = 161) =0.4.
It is also given that there are 60 guests if there is a light snow fall.
The probability for a light snow fall is 1 - 0.4 = 0.6.
Therefore, P(X = 60) = 0.6.
Expected number of guests = (161)P(X = 161) + (60)P(X = 60)
= 161(0.4) + 60(0.6)
= 64.4 + 36
= 100.4
Answer:
18
Step-by-step explanation:
6×4 +2 :2 - 7
24 +1 - 7
25 - 7
18
1 step 6×4
2step 2:2
3step 24 +1
4step 25 - 7
Step-by-step explanation:
3/8x-1/3x+6=x
(3(3x)-1(8x))/24=x-6
(9x-8x)=24(x-6)
x=24x-24×6
x=24x-144
144=24x-x
23x=144
x=144/23
