Praedup uses the inequality r+2≥25 to represent his rock and shell collection, where r is the number of rocks in his collection.
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The Ostrich will take 64 minutes to cover 40 miles.
Data;
- rate = 25 miles in 40 minute
To calculate the time it will take the ostrich to cover 40 miles, we have to compare it with the rate (speed).
Cross multiply both sides
simplify the value
divide both sides by the coefficient of x
From the calculations above, it would take the ostrich 64 minutes to cover 40 miles.
Learn more on rates here;