Answer:
z + 7
Step-by-step explanation:
<u>Step 1: Convert words into an expression</u>
The sum of z and 7
<em>z + 7</em>
<em />
Answer: z + 7
<u>If needed solve:</u>
z + 7 - 7 = 0 - 7
<em>z = -7</em>
Answer:
If I was able to see the message I would have definitely helped. I am so sorry I can not be of help
Step-by-step explanation:
Answer:



And in the figure attached we see the limits with the percentages associated.
Step-by-step explanation:
For this case we know that the random variable of interest is the scores on a test given to all juniors in a school district follows a normal distribution with the following parameters:

For this case we know from the empirical rule that within one deviation from the mean we have approximately 68.2% of the data, within 2 deviations from the mean we have 95% and within 3 deviation 99.7%
We can find the limits and we got:



And in the figure attached we see the limits with the percentages associated.
the gender of the kids does not matter so it can be discarded.
you add up how many boys and girls in the class to make a total of 50 kids
your 100% is 50
meaning 40% of 50 is 20
so if 20 kids took the bus to school then 30 did not take the bus.
It is D because you would do x+6 and would get y so it represents direct proportion