Hey there!
“(5z – 4) – 5(–3z – 6)”
DISTRIBUTE the RIGHT side of your equation
5z – 4 –5(–3z) + (–5)(–6)
–5(–3) = 15z
(–5)(–6) = 30
NEW EQUATION: 5z – 4 + 15z + 30
COMBINE your LIKE TERMS
(5z + 15z) + (4 + 30)
5z + 15z = 20z
4 + 30 = 34
ANSWER: 20z + 34 ☑️
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Answer:
The 85% confidence interval for the true mean number of reproductions per hour for the virus is between 10.1 and 10.3.
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 
.
So it is z with a pvalue of 
, so 
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.
The lower end of the interval is the sample mean subtracted by M. So it is 10.2 - 0.1 = 10.1 reproductions per hour.
The upper end of the interval is the sample mean added to M. So it is 10.2 + 0.1 = 10.3 reproductions per hour.
The 85% confidence interval for the true mean number of reproductions per hour for the virus is between 10.1 and 10.3.
First you have to change them to improper fractions
<span>You get 11/3 times 72/5 </span>
<span>Then cross out the thirds.</span>
<span>you'll get 11 times 24/5, </span><span>11 times 24 = 264
then divide it by five </span>
<span>you get 52 4/5</span>
your final answer is 52 4/5
Answer:
A. 5/3 is correct 3:5 1:n
120/10 = 12*6=72
120-72=48 answer = 48
