I just took the test yesterday and passed
1. First one is False second one is true
2. the points are -2,-3 1,6 2,9
3. -3
4. 1
12.3 or 12 3/10
4.5 + 7.8 = 12.3
or
4 10/20 + 7 16/20 = 11 26/20
11 26/20 can be simplified to 12 6/20 and further simplified to 12 3/10
Answer:
50%
Step-by-step explanation:
x%28miles = 14
x/100 × 28miles = 14
x = 1/2 × 100
=50%
Answer:
391
Step-by-step explanation:
(23 x 10) + (23 x 7) =
230 + 161 =
391
Hope this helps! Please mark as brainliest.
Answer:
The researcher should use a sample size of at least 140 children to get a margin of error to be within 2%.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of 
, and a confidence interval 
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of 
.
is the margin of error.
95% confidence interval
So 
, z is the value of Z that has a pvalue of 
, so 
.
We have that:
So
The researcher should use a sample size of at least 140 children to get a margin of error to be within 2%.
