Answer:
D is actually the correct answer.
Step-by-step explanation:
Answer:
Since , these events are not independent.
Step-by-step explanation:
Independent events:
Two events, A and B are independent, if:
In this question, we have that:
However
Since , these events are not independent.
Answer:
2
Step-by-step explanation:
Number 2 was written wrong because it should have been 1 inch / 2.54 centimeters, not the other way around.
This is because the units of the number on the top of the previous one (in this case, centimeters) has to be the same as the units on the bottom of the fraction. This means that if you have cm on top of one, the next one has to have cm on the bottom of the fraction.
Answer:
70/100 (58)
0.70 (58)
Step-by-step explanation:
Answer:
Length = 3
Width = 7
Step-by-step explanation:
The perimeter is 20 feet
The area is 21 feet
Let x represent the length
Let y represent the width
20 = 2(x+y)
x+y= 20/2
x+y = 10.........equation 1
x × y= 21......equation 2
From equation 1
x= 10-y
Substitute 10-y for x in equation 2
(10-y)y= 21
10y - y^2 = 21
y^2 -10y + 21= 0
After factorization the result will be
(x-3)(y-7)
x-3= 0
x= 0+3
x= 3
y-7= 0
y= 0+7
y= 7
Hence the length is 3 and the width is 7