Answer:
A. The standard deviation is np(1 - p).
Step-by-step explanation:
The variance of the number of successes/failures is measured by (σ2x) is n * P * ( 1 - P ).
The standard deviation (σx) is square root of [ n * P * ( 1 - P ) ]
The mean is np.
Answer:
d = 3 c= 1/4
Step-by-step explanation:
Eq. 1) -4c + 5d = 14
Eq. 2) -4c + 3d = 8 ( the written Eq. says 40 but I am guessing it's 4c )
subtract Eq. 1 and Eq. 2
2d=6
d=3
plug 3 in for d in Eq. 1
-4c + 5(3) = 14
-4c + 15 = 14
-4c = -1
c = 1/4
Answer:
Step-by-step explanation:
The speed is 212 miles per hour. The velocity is the same, but it has direction. So if up is positive and down is negative, then the velocity is -212 miles per hour.
Answer:
a.
cm or 7.21cm
b.
cm or 13.04cm
c. x= 
cm or 11.66cm, y=
cm or 13.82cm
Step-by-step explanation:
a. You have to find the length of the other two sides of the triangle using the information already given. The first side is 6cm and the other is 12-9=4cm. Because it's a right-angled triangle you can use pythagoras
b. You can use pythagoras again because it's a right-angle triangle
c. In this question you have to find x and y. We need to find x first using pythagoras
Now that we've found x we can find y using pythagoras but instead of find c, we will find another side
Hope this helps :)
