Answer:
Mr. Marcum bought 5 child tickets and 2 adult tickets.
Step-by-step explanation:
First, assume that Mr. Marcum bought either 7 tickets of child tickets or 7 tickets of adult tickets. I'm using 7 child tickets for this working.
If Mr. Marcum bought 7 child tickets,
total money spent = $4 * 7 = $28
This is not equal to $40 and there has to be more money spent.
We should also calculate the price difference between the adult ticket and the child ticket.
Price difference per ticket = $10 - $4 = $6
This means that if Mr. Marcum bought an adult instead of a child ticket, he would spend $6 more.
In this case, Mr. Marcum has to spend $40- $28 = $12 more.
Hence, the number of adult tickets replacing the child tickets is $12/$6 = 2.
The number of child tickets = 7 - 2 = 5
Answer:
1. First choice, 1/2
2. First choice, 1/2
Step-by-step explanation:
3 odd numbers on a dice, so 3/6 = 1/2
12 numbers, 1- 12, the even numbers are 2, 4, 6, 8, 1-, and 12. 6 out of 12 = 6/12 = 1/2
Answer:
The 95% confidence interval for the population mean height of males of this country is between 67.136 inches and 74.864 inches.
Step-by-step explanation:
For the country, we only have the standard deviation of the sample, so we use the t distribution to build the confidence interval.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 45 - 1 = 44
Now, we have to find a value of T, which is found looking at the t table, with 44 degrees of freedom(y-axis) and a confidence level of 0.95(). So we have T = 1.68
The margin of error is:
M = T*s = 1.68*2.3 = 3.864
In which s is the standard deviation of the sample. So
The lower end of the interval is the sample mean subtracted by M. So it is 71 - 3.864 = 67.136 inches
The upper end of the interval is the sample mean added to M. So it is 71 + 3.864 = 74.864 inches
The 95% confidence interval for the population mean height of males of this country is between 67.136 inches and 74.864 inches.
Correct answer is d y=1/2x-1/2
Answer:
You didn't provide the lines but I graphed it for you so you can match it up
Step-by-step explanation: