Answer:
And if we want to find 
we can use this formula from the definition of independent events :
And the best option would be:
Step-by-step explanation:
For this case we have the following events A and B and we also have the probabilities for each one given:
And if we want to find we can use this formula from the definition of independent events :
And the best option would be:
Answer:
y = 11/20
Step-by-step explanation:
-4/5 + y = -1/4
Add 4/5 to each side
-4/5 +4/5 + y = -1/4+4/5
y = -1/4 + 4/5
Get a common denominator
y = -1/4 *5/5 + 4/5 *4/4
y = -5/20 + 16/20
y = 11/20
Check
-4/5 +11/20 = -1/4
Get a common denominator
-4/5*4/4 + 11/20 = -1/4*5/5
-16/20 +11/20 = -5/20
-5/20 = - 5/20
Check
Y=x+3 (I did this in my head so I'm not sure)
Answer:
B= 13
Step-by-step explanation:
10x-5= 180-(4x+3)
10x-5=180-4x-3
10x-5+3=180-4x
14x-2=180
14x= 180+2
14x= 182
x=182/14
x=13
Answer: w = 4
Step-by-step explanation:
Let the unknown number be w , then
the product of w and 3 = 3w
Nine less than the product of 3 and the number = 3w - 9
completing the equation , we have
3w - 9 = 4
add 9 to both sides
3w = 13
w = 13/3
w = 4
