Im really bad at word problems can anyone tryna graduate

Let Hong lives at a distance of d miles from mountains .

We have to use the formula of speed, distance and time, which is

On droving to the mountain,

On droving back to home,

The difference between the two speeds = 18miles per hour, that is

she would want to sell 10 full-year subscriptions and at least 9 half-year subscriptions to get a total of at least $300. 

i hope this answer you! if you have any further questions or concerns, feel free to ask! : )

step-by-step explanation:

mark brainliest!