D. because PQR and XYZ are not congruent
Change everything into 10ths as follows:
1/10 + 2.5/10 = 3.5/10 of an hour to make one bracelet. Then change to 20ths so the numerator is a whole number.
Divide your time available by the time it takes to make one.
21
4 = 420= 15 bracelets
7 28
20
(as a whole number there was no fraction or remainder to round off)
#2 or B is not a function because it has 3 as X twice
13 to the second power is 169.
Hope this helps!
