Well, their speeds are (

is Jack's speed, and

is Richard's.

They, together, can paint 12 houses in 35 days. To get a single house, we only have to calculate

which is very close to 3 (a bit below)
They are not equivalent because
4:5
x2 x2
=8:10
it does not equal 8:12
your welcome:)
Answer:
+89
Step-by-step explanation:
Answer:
45
Step-by-step explanation:
I think so i dont know