No she's not correct,,,
If the teas are $50 to start with 20% up from $50 is $62.50
if she counts down 20% down from that it wouldn't be $50 but be $40.
So she would not break even.
500=140+40h
minus 140 both sides
360=40h
divide y 40
9=h
9 hours
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 all supplementary to each other because supplementary means that they all add up to 180
Answer: it’s b
Step-by-step explanation:
60+95=155. 50+70=120. 155-35=120