Answer:
y = 3 - 4x
To find the y intercept let x = 0
y = 3 - 4(0)
y = 3 or ( 0 ,3)
Hope this helps.
Answer:
The probability that the sample mean would be greater than 77.21 WPM = 0.9945
Step-by-step explanation:
Mean number of Words per Minute = u = 81
Standard Deviation = s = 17
sample size = n = 130
Target value = x = 77.21
we can find the probability by converting <u>x</u> to z-score.
The formula for z-score =
using given values, z-score =
=> -2.54
using the z table, we can find the find the probability of -2.54, that is 0.9945.
Therefore, the probability that the sample mean would be greater than 77.21 WPM = 0.9945
Answer:
The slope of line t is -4/5.
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
m=(14-10)/(2-7)
m=4/-5
Parallel lines have same slopes.
25
Square root of 25 is 5
Andy's Salary decreases by 40% in the week he was ill.
Step-by-step explanation:
Step 1;To find the percent by which Andy's salary decreases we must find the difference between the maximum salary and the obtained salary. The maximum salary is the amount of money he would have gotten if he went all days. The maximum salary is $200 a week. The salary that Andy got for working the previous week was $120.
Difference in salaries = Maximum salary -Obtained Salary = $200 - $120 = $80
Step 2; To find the percent decrease in salary in terms of maximum salary, we divide the difference in salaries by the maximum salary. We multiply this value by 100 to get it in terms of percentage.
Percent decrease in Andy's salary =Difference in salaries/Maximum salary*100
= $80/$200 * 100 = 0.40 * 100 = 40%
So Andy's salary decreases by 40% in the week he was ill.