Answer:
40.25
Explanation:
2(2x - 5 - 4) = 160 -17
first we do the first half on the left
2 × 2x = 4x
2 × -5 = -10
2 × -4 = -8
then the right
160 - 17 = 143
next is
4x - 10 - 8 = 143
we add 10 and 8, which equals - 18
4x - 18 = 143
after that we transfer the -18 to the other side to 143
4x - 18 = 143
+ 18 = +18
4x = 161
then we divide 4 on both sides
4x/4 = 161/4
x = 40.25 or 40.3 if you have to round up
Answer:
2.99
Explanation:
99.99-97 this is the reason
Answer:
1 1/2 hours
Explanation:
1/3 of an hour is 20mins
multiply 1/2mile*2
and 20mins*2
1mile in 40mins.
1*2.25
40*2.25=90mins
2 1/4 miles in 90mins or an hour and a half
That could also be written as
2 1/4 miles in 3/2 hours or 1 1/2 hours
Using the information given and the z-distribution, it is found that:
a) The point estimate of the population proportion is 0.5544.
b) The margin of error is: 0.0320.
c) The interval is: (0.5224, 0.5864).
d) The interpretation of the interval is: we are 95% sure that the true population proportion is between 0.5224 and 0.5864.
<h3>What is a confidence interval of proportions?</h3>
A confidence interval of proportions has the bounds given by the rule presented as follows:

In which the variables used to calculated these bounds are listed as follows:
is the point estimate of the population proportion.
The confidence level is of 95%, hence the critical value z is the value of Z that has a p-value of
, so the critical value is z = 1.96.
From the sample, the sample size and the point estimate are given as follows:

The margin of error is given by:


M = 0.0320.
The interval is the point estimate plus/minus the margin of error, hence:
- Lower bound: 0.5544 - 0.0320 = 0.5224.
- Upper bound: 0.5544 + 0.0320 = 0.5864.
More can be learned about the z-distribution at brainly.com/question/25890103
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