The life of a Radio Shack record player is normally distributed with a mean of 3 years and a standard deviation of 1 years. Radio Shack guarantees its record players for 2 years.
Find the probability that a record player will last less than 2 years?
Answer:
the probability that a record player will last less than 2 years is 0.1586
Step-by-step explanation:
Given that:
A mean which is normally distributed = 3
and a standard deviation = 1
The objective is to find that a record player will last less than 2 years
Let X be the random variable
i.e
From the standard normal tables :
P(X < 2) = 0.1586
Therefore; the probability that a record player will last less than 2 years is 0.1586
5(2z + 4) = 0
10z + 20 = 0
10z = -20
z = -20/10
z = -2
Answer:
d.
Step-by-step explanation:
The y-intercept value in a given equation in the slope-intercept form, y = mx + b sis represented by b.
Thus, given the line , the value of b (y-intercept) is represented as .
It is the value of y when x = 0.
Therefore, the y-intercept of the line is .
3(x-4)-4x+5
Use distributive property
3x-12-4x+5
Simplify like terms
-1x-7
Answer can be
-x-7 or -1x-7 you can choose either one they are both correct i prefer -x-7