I don’t understand when it says first across the y-axis and then across the x-axis.?
2 answers:
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Answer:
The solution of the system is at point (1,6) and (7,0).
Step-by-step explanation:
Given : System of equation and
To find : Solve the system of equation?
Solution :
We solve the equation graphically as the intersection points give you the solution of the system.
The equation given is one linear and one parabolic.
(1) is a linear equation in red line passes through (0,7) and (7,0).
(2) is a parabolic equation in blue line passes through (-1,0) and (7,0)
The intersection point of the equations are (1,6) and (7,0).
<u>Refer the attached figure below.</u>
Therefore, The solution of the system is at point (1,6) and (7,0).
Answer:
The value of E(X) is 1.56
Step-by-step explanation:
Number of Boxes=4
Number of Balls =3
If X is the number of box in which the balls are than the number of balls in the box are given as ((4-X)+1)^3
Number of ways such that all the balls are in the box number 4, no balls in the first three boxes is given as n(x=4)=1^3=1
Number of ways such that all the balls are in the box number 3, is given as n(x=3)=n(x=2)-n(x=4)=2^3-1^3=7
Number of ways such that all the balls are in the box number 2, is given as n(x=2)=n(x=1)-n(x=3)=3^3-2^3=19
Number of ways such that all the balls are in the box number 1, is given as n(x=1)=n(x=4)-n(x=3)=4^3-3^3=37
So the total number of ways are
n(total)=n(x=4)+n(x=3)+n(x=2)+n(x=1)
n(total)=1+7+19+37=64
So Probabilities are given as
p(x=1)=n(x=1)/n(total)=37/64
p(x=2)=n(x=2)/n(total)=19/64
p(x=3)=n(x=3)/n(total)=7/64
p(x=4)=n(x=4)/n(total)=1/64
So the E(x) is given as
So the value of E(X) is 1.56