You would round up from the tenth place and it would go up because 6 is higher than a 5 it would round the number up to 15...
I think that's what ur asking I'm kinda confused
Answer:
The negative three times negative five
QR = QU - RU
QR = 24 -19 = 5
QR = RS = ST = 5
QR + RS + ST = 5 + 5 + 5 = 15
TU = 24-15 = 9
SU = 5 + 9 = 14