Betty's height to jinlan's height

Hey free points ! people i have a few math questions on my profile consider looking at them i have to get done in 30 mins!

What is the solution to the system of equations? y=1.5-3 y=-x

Paco orders an ice cream for $1, but realizes his wallet is at home and he only has 3/20 of $1 with him. if his mom pays the remaining 7/20 of the dollar, how much will she pay? $0.05 $0.15 $0.85 $0.95