Answer:
E) 29.0
Step-by-step explanation:
The value of the sum is obtained from 2 independent experiments: the value of the number of the first box X₁ and the value of the number of the second box X₂.
The expected value of a draw is the average of all its values, so E(X₁) = (1+2+3+4+5+6+7+8+9+10)/10 = 5.5 and E(X₂) = (20+21+22+23+24+25+26+27)/8 = 23.5
Hence, E(X₁+X₂) = E(X₁)+E(X₂) = 5.5+23.5=29
Answer:
9.5
Step-by-step explanation:
If c to a is 19 then you divide the distance by 2 and you get 9.5 for the two distances.
Answer:
3x - 4y
Step-by-step explanation:
This results in the algebraic expression 3x - 4y. Nothing more can be done here.
Answer:
C, (12, -1)
Step-by-step explanation:
x - 2y = 14
x + 3y =9
Add 2y to both sides
x = 14 +2y
Substitute this into the second equation and solve
14 + 2y + 3y = 9
5y = 9 - 14 = -5
5y = -5
y = - 1
(you don't need to do this step because there is only one equation with y=-1, but just in case...)
Plug y into the first equation:
x - 2(-1) = 14
x - (-2)= x+2
x + 2 =14
x =12
Therefore, the answer is (12, -1)
The answer is C
