Answer:
y=3x-21
Step-by-step explanation:
y=mx+c
y=3x+c
3=24+c
c=-21
y=3x-21
Answer:
y =-x+ 5
y = -2/3x + 5/3
Step-by-step explanation:
Answer: 19.5÷70.59= 0.276
0.276×100=27.6%
Y is output and x is input
So if x=3, then 3+4=7
Answer: 7881
Step-by-step explanation:
Given : A certain type of light bulb has an average life of 900 hours, with a standard deviation of 100 hours.
i.e.
Let x be the random variable that represents the length of life of the bulb .
Now , we find the z-score for this :
For x=820
Now, the probability that the length of life of the bulb is more than 820 hours is given by :-
Now, the number of bulbs installed in amusement park =10,000
Then , the number that can be expected to last more than 820 hours :-