jose and two of his friends are collecting baseball cards. Their goal is for the three of them to collect at least 100 cards in
total. At the moment they have 43 cards. If they all plan to now collect the same number of cards,Which inequality can jose use to determine the minimum number of cards each person needs to collect to reach their goal?
2 answers:
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We will use distance formula which states:
where 'd' is the distance, 'r' is rate or speed and 't' is time taken.
So,
Let 'u' be the speed of boat in still water.
A person rows 14 miles downstream to the fishing spot.
So, the speed of boat downstream = (u+6) mph
Time taken by boat to go downstream = hr
He rows 2 miles upstream from the fishing spot.
So, the speed of boat upstream = (u-6) mph
Time taken by boat to go upstream = hr
Since, The person took same amount of time in going downstream and then going upstream.
So,
Cross multiplying, we get
u = 8
So, speed of boat in still water is 8mph.
Now, Time taken in going downstream =
=
= 1 hr
Now, Time taken in going upstream =
=
= 1 hr
So, total time taken to cover 16 miles is 2 hours.
Answer:
See below:
Step-by-step explanation:
So, we start off with the equation:
If we simplify, we can use the distrubutive property to simplify the equation:
Here is how it goes:
So upon simplification of that, we get here:
Hm, somethings off, do you see that they are the same thing...
So, that means that there would be infinately many solutions.
You can plugin any number and you would get the same result!