A sequence of transformations is described below.
A reflection over a line \overleftrightarrow{PQ}
PQ

P, Q, with, \overleftrightarrow, on top
A translation
A reflection over another line \overleftrightarrow{RS}
RS
R, S, with, \overleftrightarrow, on top
A dilation about a point TTT
Which of the following must be preserved under this sequence of transformations?

One integer is 5 more than another. their product is 104. find the integers

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)