|PR| = |PQ| + |QR|; |PQ| = |QR| conclusion |PR| = 2|PQ|
|PQ| = 3y; |PR| = 42; |QR|=?
subtitute
42 = 2(3y)
6y = 42 |divide both sides by 6
y = 7
|QR| = 3(7) = 21
Answer:

Step-by-step explanation:
You should add -77 to 77 because it will cancel out.
Answer: Interphase
Step-by-step explanation: That’s where they spend of their life