Answer:
D
Step-by-step explanation:
Since 2 variables are inter-dependent (there is correlation between them given as 0.64), we need to use the formula shown below:
Var(x+y) = Var(x) + Var(y) + 2 * correlation coefficient * *
<em><u>Given Var(m) = 1600, Var(n) = 900 and correlation coefficient 0.64, we plug them into the formula and solve:</u></em>
Var (m+n) = Var(m) + Var(n) + 2 * correlation coefficient * *
= 1600 + 900 + 2(0.64)*Sqrt(1600)*Sqrt(900)
= 4036
correct answer d
Answer:
The coordinates of point E are (-19/4,8)
Step-by-step explanation:
To find this, we use the internal division formula;
The formula is as follows;
(x ,y) = mx2 + nx1/(m + n) , my2 + ny1/(m + n)
From the question;
m = 5 n = 3
x1 = -1 , y1 = -5
x2 = -7 , y2 = 11
Substitute these values;
(x ,y) = 5(-7) + 3(-1)/(3 + 5) , 5(11) + 3(-5)/(5 + 3)
(x , y) = (-35-3)/8, (55-15)/8
(x,y ) = -38/8, 40/8
(x,y) = -19/4, 5
1. ok so 84÷5=16.8 this equals 1/5 of Fiona's saving. to find out 1/8 of the of 3/8 you would divide 16.8 by 3 which equals 5.6. to find out how much money Fiona had you would times that by 8 which equals 44$ to find out how much both of them had you would add 44+84=$128
Answer:
The experimental probability of rolling a 2 is .
Step-by-step explanation:
Since you didn't give any statements, I'll make one myself.
P of rolling a 2 (experimental):
The experimental probability of rolling a 2 is .
If you graph 4 separate triangles with the four different points, (2,3) and (1,5) form a right triangle.