1. bayside high school orchestra performed two concerts to raise money for a
field trip. tickets were $8 for adults and $5 for students and teachers. in
total, 423 people attended both concerts, and the orchestra raised $2616
the number of teachers who came was a third of the number of students.
which of the following systems can be used to represent this situation?
a. 8a +55 +5t= 423
a+s+t= 2616
t = 3s
b. sa +55 +56= 2616
a+s+t= 423
1= 4's
c. 5a +55 +8t= 2616
a+s+t= 423
t= 3 +
d. 8a +55 +50= 2616
a+s+t= 423

Acell phone company offers two plans to its subscribers. at the time new subscribers sign up, they are asked to provide some demographic information. the mean yearly income for a sample of 40 subscribers to plan a is $45,000 with a standard deviation of $9,200. for a sample of 25 subscribers to plan b, the mean income is $64,300 with a standard deviation of $7,100. at the 0.025 significance level, is it reasonable to conclude the mean income of those selecting plan b is larger? assume unequal population standard deviations. hint: for the calculations, assume the plan a as the first sample. what is the decision rule? (negative amount should be indicated by a minus sign. round your answer to 3 decimal places.) compute the value of the test statistic. (negative amount should be indicated by a minus sign. round your answer to 2 decimal places.) what is your decision regarding h0 ? reject h0 fail to reject h0 compute the p-value. less than 0.01 between 0.01 and 0.025 between 0.025 and 0.05 between 0.05 and 0.10 greater than 0.10