13. rich is driving from philadelphia to pittsburgh at 70 mph and michelle is driving from pittsburgh to philadelphia at 65 mph. if philadelphia and pittsburgh are 305 miles apart how long will it take rich and michelle to meet?

2.26 hours

Step-by-step explanation:

Given

Rich is driving from Philadelphia to Pittsburgh at 70 mph

and Michelle speed is 65 mph

If Philadelphia and  Pittsburgh is 305 miles apart

Let Rich travels x miles in t time

therefore

Michelle travels 305 -x

27x=4270

time taken t 2.26 hours

step-by-step explanation:

this is not possible to solve with the info given.   you need at least an one angle somewhere.

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950