Answer:
ans: a) x/3 + y/2 = 1
b) y = (1/3)x + 11
Step-by-step explanation:
equation of line in double intercept form is
x/a + y/b = 1
and equate given equation with y = mx + c
so m= -3
so new slope perpendicular to given line is
M = -1/m = 1/3
C in equation denotes y intercepts
The z score for a confidence level of 99% is 2.575.. You need to know this to complete this type of problem.. the other two commonly used confidence levels are 90% and 95% having z scores of 1.645 and 1.96 respectively. You need to memorize this!
To find the confidence interval, it will be defined as the sample mean plus/minus the margin of error.. Now to find the margin of error, divide the standard deviation of 12 by the square root of the number of elements in your sample(√250). Then take that result and multiply it by the Z score I mentioned above for a 99% confidence level.
In this case: the sample mean is 70 and the margin of error is approximately 1.95
So to calculate the confidence interval, do the following:
70 - 1.95 = 68.05 rounded to the nearest whole number is 68
70 + 1.95 = 71.95 rounded to the nearest whole number is 72
Looks like that would be the last choice. hope this helps.. it's been awhile since my work with statistics :-)
Answer:
non linear
Step-by-step explanation:
you can see it doesnt go up a specific number each time, aka changes each time, therefor its non linear
2^3x = 172
3x log 2 = log 172
3x = 7.4263
x = 2.475
i am a mathematics teacher. if anything to ask please pm me
1/5, 0.14, 13%, 1/8, it requires me to have more characters in the answer...
