Answer:
2
-1
-2
Step-by-step explanation:
3.1 hrs painting together
Lucia rate = 1 room/ 5 hr
Marie rate = 1 room/8hr
now combine the rates
1 room / ( 1/5 + 1/8) = 3.077 hrs
3ab + 3a + 2b + 2
3a(b+1)+2(b+1)
(b+1)(3a+2)
