Answer:
It will be 4 hours until the temperatures are the same
Step-by-step explanation:
Let 
represent the temperature in Coldspot in 
hours and
represent the temperature in Frostberg in hours.
From the question,
The temperature in Coldspot is -7° and is increasing 2.5° per hour, then we can write that
Also, from the question,
The temperature in Frostberg is 19° and is decreasing 4° per hour, then we can write that
To determine how long it will be until the temperatures are the same, that is when will be equal to , we will equate the two equations and determine .
will give the number of hours until the temperatures are the same.
Then,
∴ 
Hence, it will be 4 hours until the temperatures are the same.
The slope is -3/4
Slope formula (y2-y1)/(x2-x1)
Move the decimal once to the right . Sorry my phone giving problem putting the division to show step by step but I put it in words. 4÷14.4
4×3=12
Put the 3 on top of the 4 where 14.4 is then put the decimal .
Now your answer is 12underneatg 14 then subtract .
You get 2 bring down 4 Now 4 × what equals 24 4×6=24
So put the 6 in top of second 4 where you have 14.4 Your answer is 3.6
Answer:
Step-by-step explanation:
A phone company offers two monthly plans. Plan A costs $10 plus an additional $0.15 for each minute of calls. Plan B costs $19 plus and additional $0.10 for each minute of calls.
For what amount of calling do the two plants cost the same?
