Answer:
I think the answer is y=23x+3....
Sorry if I get it wrong! Have a nice day! (:
The sister catches up Jeff after 2 hours
Step-by-step explanation:
We can write Jeff's position and his sister position at time t using the following expressions:
- Jeff position:

where:
7 is the initial position of Jeff when his sister sarts chasing him
2.5 is Jeff's velocity (in miles/hour), so its position increases by 2.5 miles for each hour
t is the time measured in hours
- Sister position:

where
6 is the sister velocity (her position increases by 6 miles for every hour)
t is the time measured in hours
The sister catches up Jeff when the two positions are equal, so

And solving for t,

So, the sister catches Jeff after 2 hours.
Learn more about speed:
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Answer:143
Step-by-step explanation:5 goes into 715 143 times
Answer:
$25.60
Step-by-step explanation:
To find how much money will be donated, we find how many 0.25's there are in 16 and multiply that by $0.40.
16/0.25=64
64*0.4=25.6
$25.60