Answer:
The answer is
Step-by-step explanation:
The slope of a line given two points can be found by using the formula
where
(x1 , y1) and (x2 , y2) are the points
From the question the points are
A(4, 5) and B(9, 7).
The slope is
We have the final answer as
Hope this helps you
Two and two hundred fifty one thousandths
P= 7w-10/60 (I'm assuming the whole thing is over 60)
x60
60p = 7w-10
+10
60p+10 = 7w
/7
60p+10/7 =w ( it's all over 7l
Answer:
7+(5n)=45
n= 7.6
Step-by-step explanation:
Answer:
The mean life time of the bulbs is approximately 739 hours
Step-by-step explanation:
Here, we want to calculate the mean life time
From the question, 95% of the bulbs die before 920 hours
What this mean is that the probability that a bulb will die before 920 hours is 95% = 95/100 = 0.95
Now, we need the z-score that is exactly equal to this value
Using the standard normal distribution table, the z-score corresponding to this probability value is 1.645
Mathematically;
z-score = (x-mean)/SD
In this case, x is 920, SD is standard deviation which is 920 hours
thus, we have it that;
1.645 = (920-mean)/110
110(1.645) = 920 - mean
180.95 = 920 - mean
mean = 920- 180.95
mean = 739.05
