Answer:
B. 1
Step-by-step explanation:
plz give me brainliest I PROMISE YOU THIS IS CORRECT
Answer:
4x+6y^3
Step-by-step explanation:
2x+x+x+2y*3y*y
4x+6y^3
Answer:
83
Step-by-step explanation:
So there us 4 tests 3 of them are 90 to bring down the average to 88 you need to get a low mark. To get to that mark you plus all the 90s together and you add 82 then divide by 400 and times by 100 and that's how to get the answer
Answer:
A sample size of 285 is needed.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
That is z with a pvalue of , so Z = 1.96.
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
Standard deviation is $4300
This means that
What sample size do you need to have a margin of error equal to $500 with 95% confidence?
A sample size of n is needed. n is found when M = 500. So
Rounding up
A sample size of 285 is needed.
The student should have distributed the -3 to both terms in the parenthesis in the first step. so it should’ve been 9x= -6-9y