Answer:
x = 6(x - 2)
Step-by-step explanation:
His age now is x.
His age 2 years ago was x - 2.
x = 6(x - 2)
distance = rate * time
2.56 meters = 2meter/min * t
divide by 2 on each side
2.56/2 =t
1.28 minutes =t
The answer would be X =90
Answer:
5/6
Step-by-step explanation:
brainliest please
Answer:
At least 547 records need to be studied.
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
.
And the margin of error is:

95% confidence interval
So
, z is the value of Z that has a pvalue of
, so
.
In this problem, we have that:






At least 547 records need to be studied.