I am replacing my Whirlpool Duet dryer's vent hose with a rigid aluminum 4" duct. I live in a mobile home so the dryer is vented through the floor and out through the underpenning at the back of the house. The hole through the floor is off-center from the vent on the back of the dryer. Can I use two 90-degree elbows set perpendicular to each other to connect to my duct under the house? If not, what method/parts should I use? Once I connect to the duct through the hole in the floor, I will need to use at least one more 90-degree elbow. Is this okay? I will be using about 10' of duct.

Is this okay?

Yes.

Thank you!
Shannon